From patchwork Fri Sep 18 12:45:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784793 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 003AB618 for ; Fri, 18 Sep 2020 12:45:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A715E21D24 for ; Fri, 18 Sep 2020 12:45:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="s9ZOEgea" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726635AbgIRMpr (ORCPT ); Fri, 18 Sep 2020 08:45:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726126AbgIRMpr (ORCPT ); Fri, 18 Sep 2020 08:45:47 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 341F5C06174A; Fri, 18 Sep 2020 05:45:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=9yRRDQwct1JF6ZjH1ZNHGCkZ32QJgvqPcvKB0dar+RA=; b=s9ZOEgeausCRzTAIKECqvkUxtU mBy6UNf6RRm6AlyFjmIkQ3cVDdDYzfwSdhLijuDrQUI+A78+ZqGwh62ALTJTxP+Hb8b83fxY6Qyi6 isvS5QdYE1J4kBdCQWs+MMQ4aSFmky4TbtL3CMmkNu1/mGKdA0TuWf6yx7Uk0Ps1g7r1gKN2xuwhK HRHNr25lHpABcK0AvSVrpaODyp1+JRO4exW0ZmPuLFmNoS3AjrOgbDe3M4ZooZEY0dg3iws/po7YP mnoC1b0zsP8OSDeJX3yk3JwikUwzt2CQzpFw1N1+BKD+glSDIGYYTqxd9FdthshAjsDRO8EDuc8gB 68Zuo9Zg==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFlh-0008Sq-JK; Fri, 18 Sep 2020 12:45:37 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Date: Fri, 18 Sep 2020 14:45:25 +0200 Message-Id: <20200918124533.3487701-2-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Add a flag to force processing a syscall as a compat syscall. This is required so that in_compat_syscall() works for I/O submitted by io_uring helper threads on behalf of compat syscalls. Signed-off-by: Christoph Hellwig --- arch/sparc/include/asm/compat.h | 3 ++- arch/x86/include/asm/compat.h | 2 +- fs/io_uring.c | 9 +++++++++ include/linux/compat.h | 5 ++++- include/linux/sched.h | 1 + 5 files changed, 17 insertions(+), 3 deletions(-) diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h index 40a267b3bd5208..fee6c51d36e869 100644 --- a/arch/sparc/include/asm/compat.h +++ b/arch/sparc/include/asm/compat.h @@ -211,7 +211,8 @@ static inline int is_compat_task(void) static inline bool in_compat_syscall(void) { /* Vector 0x110 is LINUX_32BIT_SYSCALL_TRAP */ - return pt_regs_trap_type(current_pt_regs()) == 0x110; + return pt_regs_trap_type(current_pt_regs()) == 0x110 || + (current->flags & PF_FORCE_COMPAT); } #define in_compat_syscall in_compat_syscall #endif diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h index d4edf281fff49d..fbab072d4e5b31 100644 --- a/arch/x86/include/asm/compat.h +++ b/arch/x86/include/asm/compat.h @@ -208,7 +208,7 @@ static inline bool in_32bit_syscall(void) #ifdef CONFIG_COMPAT static inline bool in_compat_syscall(void) { - return in_32bit_syscall(); + return in_32bit_syscall() || (current->flags & PF_FORCE_COMPAT); } #define in_compat_syscall in_compat_syscall /* override the generic impl */ #endif diff --git a/fs/io_uring.c b/fs/io_uring.c index 3790c7fe9fee22..5755d557c3f7bc 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5449,6 +5449,9 @@ static int io_req_defer_prep(struct io_kiocb *req, if (unlikely(ret)) return ret; + if (req->ctx->compat) + current->flags |= PF_FORCE_COMPAT; + switch (req->opcode) { case IORING_OP_NOP: break; @@ -5546,6 +5549,7 @@ static int io_req_defer_prep(struct io_kiocb *req, break; } + current->flags &= ~PF_FORCE_COMPAT; return ret; } @@ -5669,6 +5673,9 @@ static int io_issue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe, struct io_ring_ctx *ctx = req->ctx; int ret; + if (ctx->compat) + current->flags |= PF_FORCE_COMPAT; + switch (req->opcode) { case IORING_OP_NOP: ret = io_nop(req, cs); @@ -5898,6 +5905,8 @@ static int io_issue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe, break; } + current->flags &= ~PF_FORCE_COMPAT; + if (ret) return ret; diff --git a/include/linux/compat.h b/include/linux/compat.h index b354ce58966e2d..685066f7ad325f 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -891,7 +891,10 @@ asmlinkage long compat_sys_socketcall(int call, u32 __user *args); */ #ifndef in_compat_syscall -static inline bool in_compat_syscall(void) { return is_compat_task(); } +static inline bool in_compat_syscall(void) +{ + return is_compat_task() || (current->flags & PF_FORCE_COMPAT); +} #endif /** diff --git a/include/linux/sched.h b/include/linux/sched.h index afe01e232935fa..c8b183b5655a1e 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1491,6 +1491,7 @@ extern struct pid *cad_pid; */ #define PF_IDLE 0x00000002 /* I am an IDLE thread */ #define PF_EXITING 0x00000004 /* Getting shut down */ +#define PF_FORCE_COMPAT 0x00000008 /* acting as compat task */ #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ #define PF_WQ_WORKER 0x00000020 /* I'm a workqueue worker */ #define PF_FORKNOEXEC 0x00000040 /* Forked but didn't exec */ From patchwork Fri Sep 18 12:45:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784945 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E660C618 for ; Fri, 18 Sep 2020 12:47:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB3D5208B8 for ; Fri, 18 Sep 2020 12:47:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="qsANdrRg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726826AbgIRMr4 (ORCPT ); Fri, 18 Sep 2020 08:47:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726656AbgIRMps (ORCPT ); Fri, 18 Sep 2020 08:45:48 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0109CC06174A; Fri, 18 Sep 2020 05:45:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=H4vmpg6xgkoXCLn5I2mItRATcwVmk1ozujrnZCuEUx0=; b=qsANdrRgc9TU4G6kpHm4Xqcx0V cJ0JkyB7pFhKmxoghOAG+WhyELXw1o/GY9iOVdX3hadeGylJZuF+BeIYztvCSOfarnNoBQoubpbBb yZtnSRzgHNzhu8n0Jp+M/2Ip6/rNa9BxUNaI1FN4nj9tmnOVUxMF0gAcvqzy+QpI54MPnybUSozTH unZ7QUE8cHXgMuxpPH8ygbvyWRmCgn0s/qzJCOnrTbeK31mRWOEKiqU5vR7NbsioVGKSaUtJnOWkt EcYT0DE8HLVxP7r5H4OGqMrGZ/gLJc+nbY61bFt1DN2QXl1wwKZpkjSFBkS+CVlnhlfzX+V+up3RT +0m/YcRA==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFli-0008St-Ns; Fri, 18 Sep 2020 12:45:39 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 2/9] compat.h: fix a spelling error in Date: Fri, 18 Sep 2020 14:45:26 +0200 Message-Id: <20200918124533.3487701-3-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org We only have not compat_sys_readv64v2 syscall, only a compat_sys_preadv64v2 syscall one. This probably worked given that the syscall was not referenced from anywhere but the x86 syscall table. Signed-off-by: Christoph Hellwig --- include/linux/compat.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/compat.h b/include/linux/compat.h index 685066f7ad325f..69968c124b3cad 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -812,7 +812,7 @@ asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, const struct compat_iovec __user *vec, compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 -asmlinkage long compat_sys_readv64v2(unsigned long fd, +asmlinkage long compat_sys_preadv64v2(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen, loff_t pos, rwf_t flags); #endif From patchwork Fri Sep 18 12:45:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784817 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BBD2E618 for ; Fri, 18 Sep 2020 12:46:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F3B520717 for ; Fri, 18 Sep 2020 12:46:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="sY+q9nG0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726803AbgIRMqC (ORCPT ); Fri, 18 Sep 2020 08:46:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726714AbgIRMpt (ORCPT ); Fri, 18 Sep 2020 08:45:49 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C586C061756; Fri, 18 Sep 2020 05:45:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=JS63/rqkwUNTXwLowQfzdacfYjAtRcLXlr++78o/BT4=; b=sY+q9nG0cOiCMUx60dsbMGVPCz LVrYVhlOm2U0rDRkmCim2mpUjwSFA6xVzz7XwcQDo4SGRAVwynXQreWP6XBiVGi0g8W953f/N5oAl fMg12npyy16DCpLmH5VyXk669QwmnN85j6R0RkgK4f6gMcC3WoQ2pca3RMQOVsobTRfwuN1EThzdb jmGzqX9W6pU1MU4WfYmm+VGPkudgq8nJGWoYHdACNbyNatdhwXgx392LSabw4WcTao2KVrdLM7tlC iBsImmimlsk8J7PE28Q6ManmOx7kcJttWHAavkEleNAMRyHiwRuRenktDL1zD4kI4xDUsqKE4hm8M JLB9Xxjg==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFlk-0008T4-DQ; Fri, 18 Sep 2020 12:45:40 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 3/9] fs: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector Date: Fri, 18 Sep 2020 14:45:27 +0200 Message-Id: <20200918124533.3487701-4-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Explicitly check for the magic value insted of implicitly relying on its number representation. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn --- fs/read_write.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index 5db58b8c78d0dd..f153116bc5399b 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -840,8 +840,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, ret = -EINVAL; goto out; } - if (type >= 0 - && unlikely(!access_ok(buf, len))) { + if (type != CHECK_IOVEC_ONLY && unlikely(!access_ok(buf, len))) { ret = -EFAULT; goto out; } @@ -911,7 +910,7 @@ ssize_t compat_rw_copy_check_uvector(int type, } if (len < 0) /* size_t not fitting in compat_ssize_t .. */ goto out; - if (type >= 0 && + if (type != CHECK_IOVEC_ONLY && !access_ok(compat_ptr(buf), len)) { ret = -EFAULT; goto out; From patchwork Fri Sep 18 12:45:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784839 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72E806CB for ; Fri, 18 Sep 2020 12:46:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B62D2311A for ; Fri, 18 Sep 2020 12:46:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="W/Cc86rP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726759AbgIRMp7 (ORCPT ); Fri, 18 Sep 2020 08:45:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726711AbgIRMpt (ORCPT ); Fri, 18 Sep 2020 08:45:49 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02944C06174A; Fri, 18 Sep 2020 05:45:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=KK7IgR2CMF5YRRGUzRRMNzfvcQVoZOlIu5tIkEcJClw=; b=W/Cc86rPhELys3E2tpcxd0WzM4 SfMythDWxNIKXXEKlC2dycuQNsVQBCguS2qgBdAlMDKaj2AQmjnp0bL7R3/V83Bs65oleR+aOEZts tECo6IxMLI9KUyO9hFjs8OHVDZBHQQ7dTVGmzxlrUyLBa3PylGVrMsGbV0wkVnPdTBpwQAuRWPz5o PPLGP7q5lOHdEVjYa/49ZedCIkpFTvabo5RCWRS/bKcSmEZsSpAjGsKMU6o7FYrpK7bSLRcFTBhOs TKEvXyuLdziCkakH7l1jobNbQ854evUOJbrKnqIXvEtOCgFhSOZ2RYc/i9W4hnn0NESnFhZbtayjN r4Ep667g==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFll-0008TH-G9; Fri, 18 Sep 2020 12:45:41 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 4/9] fs: handle the compat case in import_iovec Date: Fri, 18 Sep 2020 14:45:28 +0200 Message-Id: <20200918124533.3487701-5-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Use in compat_syscall to import either native or the compat iovecs, and remove the now superflous compat_import_iovec. Signed-off-by: Christoph Hellwig --- block/scsi_ioctl.c | 12 +--- drivers/scsi/sg.c | 9 +-- fs/aio.c | 38 +++++------- fs/io_uring.c | 12 +--- fs/read_write.c | 127 +++++++++++++++-------------------------- fs/splice.c | 2 +- include/linux/compat.h | 6 -- include/linux/fs.h | 7 +-- include/linux/uio.h | 7 --- lib/iov_iter.c | 30 +--------- mm/process_vm_access.c | 9 +-- net/compat.c | 4 +- security/keys/compat.c | 5 +- 13 files changed, 83 insertions(+), 185 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index ef722f04f88a93..e08df86866ee5d 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -333,16 +333,8 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk, struct iov_iter i; struct iovec *iov = NULL; -#ifdef CONFIG_COMPAT - if (in_compat_syscall()) - ret = compat_import_iovec(rq_data_dir(rq), - hdr->dxferp, hdr->iovec_count, - 0, &iov, &i); - else -#endif - ret = import_iovec(rq_data_dir(rq), - hdr->dxferp, hdr->iovec_count, - 0, &iov, &i); + ret = import_iovec(rq_data_dir(rq), hdr->dxferp, + hdr->iovec_count, 0, &iov, &i); if (ret < 0) goto out_free_cdb; diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 20472aaaf630a4..bfa8d77322d732 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1820,14 +1820,7 @@ sg_start_req(Sg_request *srp, unsigned char *cmd) struct iovec *iov = NULL; struct iov_iter i; -#ifdef CONFIG_COMPAT - if (in_compat_syscall()) - res = compat_import_iovec(rw, hp->dxferp, iov_count, - 0, &iov, &i); - else -#endif - res = import_iovec(rw, hp->dxferp, iov_count, - 0, &iov, &i); + res = import_iovec(rw, hp->dxferp, iov_count, 0, &iov, &i); if (res < 0) return res; diff --git a/fs/aio.c b/fs/aio.c index d5ec303855669d..b377f5c2048e18 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1478,8 +1478,7 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb) } static ssize_t aio_setup_rw(int rw, const struct iocb *iocb, - struct iovec **iovec, bool vectored, bool compat, - struct iov_iter *iter) + struct iovec **iovec, bool vectored, struct iov_iter *iter) { void __user *buf = (void __user *)(uintptr_t)iocb->aio_buf; size_t len = iocb->aio_nbytes; @@ -1489,11 +1488,6 @@ static ssize_t aio_setup_rw(int rw, const struct iocb *iocb, *iovec = NULL; return ret; } -#ifdef CONFIG_COMPAT - if (compat) - return compat_import_iovec(rw, buf, len, UIO_FASTIOV, iovec, - iter); -#endif return import_iovec(rw, buf, len, UIO_FASTIOV, iovec, iter); } @@ -1517,8 +1511,7 @@ static inline void aio_rw_done(struct kiocb *req, ssize_t ret) } } -static int aio_read(struct kiocb *req, const struct iocb *iocb, - bool vectored, bool compat) +static int aio_read(struct kiocb *req, const struct iocb *iocb, bool vectored) { struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs; struct iov_iter iter; @@ -1535,7 +1528,7 @@ static int aio_read(struct kiocb *req, const struct iocb *iocb, if (unlikely(!file->f_op->read_iter)) return -EINVAL; - ret = aio_setup_rw(READ, iocb, &iovec, vectored, compat, &iter); + ret = aio_setup_rw(READ, iocb, &iovec, vectored, &iter); if (ret < 0) return ret; ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter)); @@ -1545,8 +1538,7 @@ static int aio_read(struct kiocb *req, const struct iocb *iocb, return ret; } -static int aio_write(struct kiocb *req, const struct iocb *iocb, - bool vectored, bool compat) +static int aio_write(struct kiocb *req, const struct iocb *iocb, bool vectored) { struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs; struct iov_iter iter; @@ -1563,7 +1555,7 @@ static int aio_write(struct kiocb *req, const struct iocb *iocb, if (unlikely(!file->f_op->write_iter)) return -EINVAL; - ret = aio_setup_rw(WRITE, iocb, &iovec, vectored, compat, &iter); + ret = aio_setup_rw(WRITE, iocb, &iovec, vectored, &iter); if (ret < 0) return ret; ret = rw_verify_area(WRITE, file, &req->ki_pos, iov_iter_count(&iter)); @@ -1799,8 +1791,7 @@ static int aio_poll(struct aio_kiocb *aiocb, const struct iocb *iocb) } static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb, - struct iocb __user *user_iocb, struct aio_kiocb *req, - bool compat) + struct iocb __user *user_iocb, struct aio_kiocb *req) { req->ki_filp = fget(iocb->aio_fildes); if (unlikely(!req->ki_filp)) @@ -1833,13 +1824,13 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb, switch (iocb->aio_lio_opcode) { case IOCB_CMD_PREAD: - return aio_read(&req->rw, iocb, false, compat); + return aio_read(&req->rw, iocb, false); case IOCB_CMD_PWRITE: - return aio_write(&req->rw, iocb, false, compat); + return aio_write(&req->rw, iocb, false); case IOCB_CMD_PREADV: - return aio_read(&req->rw, iocb, true, compat); + return aio_read(&req->rw, iocb, true); case IOCB_CMD_PWRITEV: - return aio_write(&req->rw, iocb, true, compat); + return aio_write(&req->rw, iocb, true); case IOCB_CMD_FSYNC: return aio_fsync(&req->fsync, iocb, false); case IOCB_CMD_FDSYNC: @@ -1852,8 +1843,7 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb, } } -static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, - bool compat) +static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb) { struct aio_kiocb *req; struct iocb iocb; @@ -1882,7 +1872,7 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, if (unlikely(!req)) return -EAGAIN; - err = __io_submit_one(ctx, &iocb, user_iocb, req, compat); + err = __io_submit_one(ctx, &iocb, user_iocb, req); /* Done with the synchronous reference */ iocb_put(req); @@ -1941,7 +1931,7 @@ SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr, break; } - ret = io_submit_one(ctx, user_iocb, false); + ret = io_submit_one(ctx, user_iocb); if (ret) break; } @@ -1983,7 +1973,7 @@ COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id, break; } - ret = io_submit_one(ctx, compat_ptr(user_iocb), true); + ret = io_submit_one(ctx, compat_ptr(user_iocb)); if (ret) break; } diff --git a/fs/io_uring.c b/fs/io_uring.c index 5755d557c3f7bc..dc888f911f04b4 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2837,12 +2837,6 @@ static ssize_t __io_import_iovec(int rw, struct io_kiocb *req, return ret; } -#ifdef CONFIG_COMPAT - if (req->ctx->compat) - return compat_import_iovec(rw, buf, sqe_len, UIO_FASTIOV, - iovec, iter); -#endif - return import_iovec(rw, buf, sqe_len, UIO_FASTIOV, iovec, iter); } @@ -4220,9 +4214,9 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, sr->len = iomsg->iov[0].iov_len; iomsg->iov = NULL; } else { - ret = compat_import_iovec(READ, uiov, len, UIO_FASTIOV, - &iomsg->iov, - &iomsg->msg.msg_iter); + ret = import_iovec(READ, (struct iovec __user *)uiov, len, + UIO_FASTIOV, &iomsg->iov, + &iomsg->msg.msg_iter); if (ret < 0) return ret; } diff --git a/fs/read_write.c b/fs/read_write.c index f153116bc5399b..2f961c653ce561 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -752,6 +752,38 @@ static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter, return ret; } +static int compat_copy_iovecs_from_user(struct iovec *iov, + const struct iovec __user *uvector, unsigned long nr_segs) +{ + const struct compat_iovec __user *uiov = + (const struct compat_iovec __user *)uvector; + unsigned long i; + int ret = -EFAULT; + + if (!user_access_begin(uvector, nr_segs * sizeof(*uvector))) + return -EFAULT; + + for (i = 0; i < nr_segs; i++) { + compat_uptr_t buf; + compat_ssize_t len; + + unsafe_get_user(len, &uiov[i].iov_len, out); + unsafe_get_user(buf, &uiov[i].iov_base, out); + + /* check for compat_size_t not fitting in compat_ssize_t .. */ + if (len < 0) { + ret = -EINVAL; + goto out; + } + iov[i].iov_base = compat_ptr(buf); + iov[i].iov_len = len; + } + ret = 0; +out: + user_access_end(); + return ret; +} + /** * rw_copy_check_uvector() - Copy an array of &struct iovec from userspace * into the kernel and check that it is valid. @@ -808,6 +840,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, ret = -EINVAL; goto out; } + if (nr_segs > fast_segs) { iov = kmalloc_array(nr_segs, sizeof(struct iovec), GFP_KERNEL); if (iov == NULL) { @@ -815,9 +848,16 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, goto out; } } - if (copy_from_user(iov, uvector, nr_segs*sizeof(*uvector))) { - ret = -EFAULT; - goto out; + + if (in_compat_syscall()) { + ret = compat_copy_iovecs_from_user(iov, uvector, nr_segs); + if (ret) + goto out; + } else { + if (copy_from_user(iov, uvector, nr_segs * sizeof(*uvector))) { + ret = -EFAULT; + goto out; + } } /* @@ -855,81 +895,6 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, return ret; } -#ifdef CONFIG_COMPAT -ssize_t compat_rw_copy_check_uvector(int type, - const struct compat_iovec __user *uvector, unsigned long nr_segs, - unsigned long fast_segs, struct iovec *fast_pointer, - struct iovec **ret_pointer) -{ - compat_ssize_t tot_len; - struct iovec *iov = *ret_pointer = fast_pointer; - ssize_t ret = 0; - int seg; - - /* - * SuS says "The readv() function *may* fail if the iovcnt argument - * was less than or equal to 0, or greater than {IOV_MAX}. Linux has - * traditionally returned zero for zero segments, so... - */ - if (nr_segs == 0) - goto out; - - ret = -EINVAL; - if (nr_segs > UIO_MAXIOV) - goto out; - if (nr_segs > fast_segs) { - ret = -ENOMEM; - iov = kmalloc_array(nr_segs, sizeof(struct iovec), GFP_KERNEL); - if (iov == NULL) - goto out; - } - *ret_pointer = iov; - - ret = -EFAULT; - if (!access_ok(uvector, nr_segs*sizeof(*uvector))) - goto out; - - /* - * Single unix specification: - * We should -EINVAL if an element length is not >= 0 and fitting an - * ssize_t. - * - * In Linux, the total length is limited to MAX_RW_COUNT, there is - * no overflow possibility. - */ - tot_len = 0; - ret = -EINVAL; - for (seg = 0; seg < nr_segs; seg++) { - compat_uptr_t buf; - compat_ssize_t len; - - if (__get_user(len, &uvector->iov_len) || - __get_user(buf, &uvector->iov_base)) { - ret = -EFAULT; - goto out; - } - if (len < 0) /* size_t not fitting in compat_ssize_t .. */ - goto out; - if (type != CHECK_IOVEC_ONLY && - !access_ok(compat_ptr(buf), len)) { - ret = -EFAULT; - goto out; - } - if (len > MAX_RW_COUNT - tot_len) - len = MAX_RW_COUNT - tot_len; - tot_len += len; - iov->iov_base = compat_ptr(buf); - iov->iov_len = (compat_size_t) len; - uvector++; - iov++; - } - ret = tot_len; - -out: - return ret; -} -#endif - static ssize_t do_iter_read(struct file *file, struct iov_iter *iter, loff_t *pos, rwf_t flags) { @@ -1256,7 +1221,8 @@ static size_t compat_readv(struct file *file, struct iov_iter iter; ssize_t ret; - ret = compat_import_iovec(READ, vec, vlen, UIO_FASTIOV, &iov, &iter); + ret = import_iovec(READ, (const struct iovec __user *)vec, vlen, + UIO_FASTIOV, &iov, &iter); if (ret >= 0) { ret = do_iter_read(file, &iter, pos, flags); kfree(iov); @@ -1364,7 +1330,8 @@ static size_t compat_writev(struct file *file, struct iov_iter iter; ssize_t ret; - ret = compat_import_iovec(WRITE, vec, vlen, UIO_FASTIOV, &iov, &iter); + ret = import_iovec(WRITE, (const struct iovec __user *)vec, vlen, + UIO_FASTIOV, &iov, &iter); if (ret >= 0) { file_start_write(file); ret = do_iter_write(file, &iter, pos, flags); diff --git a/fs/splice.c b/fs/splice.c index d7c8a7c4db07ff..132d42b9871f9b 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1387,7 +1387,7 @@ COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, io if (error) return error; - error = compat_import_iovec(type, iov32, nr_segs, + error = import_iovec(type, (struct iovec __user *)iov32, nr_segs, ARRAY_SIZE(iovstack), &iov, &iter); if (error >= 0) { error = do_vmsplice(f.file, &iter, flags); diff --git a/include/linux/compat.h b/include/linux/compat.h index 69968c124b3cad..ad6dc56e8828d6 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -451,12 +451,6 @@ extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, struct epoll_event; /* fortunately, this one is fixed-layout */ -extern ssize_t compat_rw_copy_check_uvector(int type, - const struct compat_iovec __user *uvector, - unsigned long nr_segs, - unsigned long fast_segs, struct iovec *fast_pointer, - struct iovec **ret_pointer); - extern void __user *compat_alloc_user_space(unsigned long len); int compat_restore_altstack(const compat_stack_t __user *uss); diff --git a/include/linux/fs.h b/include/linux/fs.h index 7519ae003a082c..3cc0ee0de45648 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -179,10 +179,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset, #define FMODE_BUF_RASYNC ((__force fmode_t)0x40000000) /* - * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector - * that indicates that they should check the contents of the iovec are - * valid, but not check the memory that the iovec elements - * points too. + * Flag for rw_copy_check_uvector that indicates that they should check the + * contents of the iovec are valid, but not check the memory that the iovec + * elements points too. */ #define CHECK_IOVEC_ONLY -1 diff --git a/include/linux/uio.h b/include/linux/uio.h index 3835a8a8e9eae0..2c14e55687fec6 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -270,13 +270,6 @@ ssize_t import_iovec(int type, const struct iovec __user * uvector, unsigned nr_segs, unsigned fast_segs, struct iovec **iov, struct iov_iter *i); -#ifdef CONFIG_COMPAT -struct compat_iovec; -ssize_t compat_import_iovec(int type, const struct compat_iovec __user * uvector, - unsigned nr_segs, unsigned fast_segs, - struct iovec **iov, struct iov_iter *i); -#endif - int import_single_range(int type, void __user *buf, size_t len, struct iovec *iov, struct iov_iter *i); diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 5e40786c8f1232..792f31c1cd96ba 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -10,6 +10,7 @@ #include #include #include +#include #define PIPE_PARANOIA /* for now */ @@ -1678,32 +1679,8 @@ ssize_t import_iovec(int type, const struct iovec __user * uvector, { ssize_t n; struct iovec *p; - n = rw_copy_check_uvector(type, uvector, nr_segs, fast_segs, - *iov, &p); - if (n < 0) { - if (p != *iov) - kfree(p); - *iov = NULL; - return n; - } - iov_iter_init(i, type, p, nr_segs, n); - *iov = p == *iov ? NULL : p; - return n; -} -EXPORT_SYMBOL(import_iovec); -#ifdef CONFIG_COMPAT -#include - -ssize_t compat_import_iovec(int type, - const struct compat_iovec __user * uvector, - unsigned nr_segs, unsigned fast_segs, - struct iovec **iov, struct iov_iter *i) -{ - ssize_t n; - struct iovec *p; - n = compat_rw_copy_check_uvector(type, uvector, nr_segs, fast_segs, - *iov, &p); + n = rw_copy_check_uvector(type, uvector, nr_segs, fast_segs, *iov, &p); if (n < 0) { if (p != *iov) kfree(p); @@ -1714,8 +1691,7 @@ ssize_t compat_import_iovec(int type, *iov = p == *iov ? NULL : p; return n; } -EXPORT_SYMBOL(compat_import_iovec); -#endif +EXPORT_SYMBOL(import_iovec); int import_single_range(int rw, void __user *buf, size_t len, struct iovec *iov, struct iov_iter *i) diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 29c052099affdc..f21feebbd48f39 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -329,14 +329,15 @@ compat_process_vm_rw(compat_pid_t pid, if (flags != 0) return -EINVAL; - rc = compat_import_iovec(dir, lvec, liovcnt, UIO_FASTIOV, &iov_l, &iter); + rc = import_iovec(dir, (const struct iovec __user *)lvec, liovcnt, + UIO_FASTIOV, &iov_l, &iter); if (rc < 0) return rc; if (!iov_iter_count(&iter)) goto free_iovecs; - rc = compat_rw_copy_check_uvector(CHECK_IOVEC_ONLY, rvec, riovcnt, - UIO_FASTIOV, iovstack_r, - &iov_r); + rc = rw_copy_check_uvector(CHECK_IOVEC_ONLY, + (const struct iovec __user *)rvec, riovcnt, + UIO_FASTIOV, iovstack_r, &iov_r); if (rc <= 0) goto free_iovecs; diff --git a/net/compat.c b/net/compat.c index 95ce707a30a31d..ddd15af3a2837b 100644 --- a/net/compat.c +++ b/net/compat.c @@ -98,8 +98,8 @@ int get_compat_msghdr(struct msghdr *kmsg, if (err) return err; - err = compat_import_iovec(save_addr ? READ : WRITE, compat_ptr(ptr), - len, UIO_FASTIOV, iov, &kmsg->msg_iter); + err = import_iovec(save_addr ? READ : WRITE, compat_ptr(ptr), len, + UIO_FASTIOV, iov, &kmsg->msg_iter); return err < 0 ? err : 0; } diff --git a/security/keys/compat.c b/security/keys/compat.c index 6ee9d8f6a4a5bb..7ae531db031cf8 100644 --- a/security/keys/compat.c +++ b/security/keys/compat.c @@ -33,9 +33,8 @@ static long compat_keyctl_instantiate_key_iov( if (!_payload_iov) ioc = 0; - ret = compat_import_iovec(WRITE, _payload_iov, ioc, - ARRAY_SIZE(iovstack), &iov, - &from); + ret = import_iovec(WRITE, (const struct iovec __user *)_payload_iov, + ioc, ARRAY_SIZE(iovstack), &iov, &from); if (ret < 0) return ret; From patchwork Fri Sep 18 12:45:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784907 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4E6C66CB for ; Fri, 18 Sep 2020 12:46:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2AC4E208B8 for ; Fri, 18 Sep 2020 12:46:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="mMGkNJJA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726993AbgIRMqy (ORCPT ); Fri, 18 Sep 2020 08:46:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726728AbgIRMpu (ORCPT ); Fri, 18 Sep 2020 08:45:50 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C23BCC06174A; Fri, 18 Sep 2020 05:45:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=3SESYGKtB1lpc64/bkwR7aGDVPB4F1Qu4U+uxvJgV7U=; b=mMGkNJJAEzq6gANYqzQ5ad9xCD SQskSBvnbopLh2079ZKH8Zc6v2V8SB28pkjxEr5BehWEEJPfiyKimTe5Yi8IDRWGcgn6AitpCXFi1 Y3mqMoWAP6xV6EUNA7BHZfd7a5fV25mI0/Ty5sctiYrlv20M0cRgIrVkkAIwo7Ps9VpOZ9JgAGHb7 GJn/46UHkUWZydBvlQhwkQtJgvX5jM9u1pAdAb+XYBXJ5BTOH/jkcFZeFA9nJ2bbEb4wo0Or+ZQfU /EPhL12gs9eOyqCaIzbFdlpJy7YLTP5XCoBi1+qw8iHufWUKnEpUBgD7S5fyoehHNLUgHvhyTfAvN HTf5y1zQ==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFlm-0008TR-No; Fri, 18 Sep 2020 12:45:42 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 5/9] fs: remove various compat readv/writev helpers Date: Fri, 18 Sep 2020 14:45:29 +0200 Message-Id: <20200918124533.3487701-6-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Now that import_iovec handles compat iovecs as well, all the duplicated code in the compat readv/writev helpers is not needed. Remove them and switch the compat syscall handlers to use the native helpers. Signed-off-by: Christoph Hellwig --- fs/read_write.c | 179 ++++++++---------------------------------------- 1 file changed, 30 insertions(+), 149 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index 2f961c653ce561..9eb63c53da78f2 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1211,226 +1211,107 @@ SYSCALL_DEFINE6(pwritev2, unsigned long, fd, const struct iovec __user *, vec, return do_pwritev(fd, vec, vlen, pos, flags); } +/* + * Various compat syscalls. Note that they all pretend to take a native + * iovec - import_iovec will properly treat those as compat_iovecs based on + * in_compat_syscall(). + */ #ifdef CONFIG_COMPAT -static size_t compat_readv(struct file *file, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t *pos, rwf_t flags) -{ - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - struct iov_iter iter; - ssize_t ret; - - ret = import_iovec(READ, (const struct iovec __user *)vec, vlen, - UIO_FASTIOV, &iov, &iter); - if (ret >= 0) { - ret = do_iter_read(file, &iter, pos, flags); - kfree(iov); - } - if (ret > 0) - add_rchar(current, ret); - inc_syscr(current); - return ret; -} - -static size_t do_compat_readv(compat_ulong_t fd, - const struct compat_iovec __user *vec, - compat_ulong_t vlen, rwf_t flags) -{ - struct fd f = fdget_pos(fd); - ssize_t ret; - loff_t pos; - - if (!f.file) - return -EBADF; - pos = f.file->f_pos; - ret = compat_readv(f.file, vec, vlen, &pos, flags); - if (ret >= 0) - f.file->f_pos = pos; - fdput_pos(f); - return ret; - -} - COMPAT_SYSCALL_DEFINE3(readv, compat_ulong_t, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, compat_ulong_t, vlen) { - return do_compat_readv(fd, vec, vlen, 0); -} - -static long do_compat_preadv64(unsigned long fd, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t pos, rwf_t flags) -{ - struct fd f; - ssize_t ret; - - if (pos < 0) - return -EINVAL; - f = fdget(fd); - if (!f.file) - return -EBADF; - ret = -ESPIPE; - if (f.file->f_mode & FMODE_PREAD) - ret = compat_readv(f.file, vec, vlen, &pos, flags); - fdput(f); - return ret; + return do_readv(fd, vec, vlen, 0); } #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, unsigned long, vlen, loff_t, pos) { - return do_compat_preadv64(fd, vec, vlen, pos, 0); + return do_preadv(fd, vec, vlen, pos, 0); } #endif COMPAT_SYSCALL_DEFINE5(preadv, compat_ulong_t, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high) { loff_t pos = ((loff_t)pos_high << 32) | pos_low; - return do_compat_preadv64(fd, vec, vlen, pos, 0); + return do_preadv(fd, vec, vlen, pos, 0); } #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 COMPAT_SYSCALL_DEFINE5(preadv64v2, unsigned long, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, unsigned long, vlen, loff_t, pos, rwf_t, flags) { if (pos == -1) - return do_compat_readv(fd, vec, vlen, flags); - - return do_compat_preadv64(fd, vec, vlen, pos, flags); + return do_readv(fd, vec, vlen, flags); + return do_preadv(fd, vec, vlen, pos, flags); } #endif COMPAT_SYSCALL_DEFINE6(preadv2, compat_ulong_t, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high, rwf_t, flags) { loff_t pos = ((loff_t)pos_high << 32) | pos_low; if (pos == -1) - return do_compat_readv(fd, vec, vlen, flags); - - return do_compat_preadv64(fd, vec, vlen, pos, flags); -} - -static size_t compat_writev(struct file *file, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t *pos, rwf_t flags) -{ - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - struct iov_iter iter; - ssize_t ret; - - ret = import_iovec(WRITE, (const struct iovec __user *)vec, vlen, - UIO_FASTIOV, &iov, &iter); - if (ret >= 0) { - file_start_write(file); - ret = do_iter_write(file, &iter, pos, flags); - file_end_write(file); - kfree(iov); - } - if (ret > 0) - add_wchar(current, ret); - inc_syscw(current); - return ret; -} - -static size_t do_compat_writev(compat_ulong_t fd, - const struct compat_iovec __user* vec, - compat_ulong_t vlen, rwf_t flags) -{ - struct fd f = fdget_pos(fd); - ssize_t ret; - loff_t pos; - - if (!f.file) - return -EBADF; - pos = f.file->f_pos; - ret = compat_writev(f.file, vec, vlen, &pos, flags); - if (ret >= 0) - f.file->f_pos = pos; - fdput_pos(f); - return ret; + return do_readv(fd, vec, vlen, flags); + return do_preadv(fd, vec, vlen, pos, flags); } COMPAT_SYSCALL_DEFINE3(writev, compat_ulong_t, fd, - const struct compat_iovec __user *, vec, + const struct iovec __user *, vec, compat_ulong_t, vlen) { - return do_compat_writev(fd, vec, vlen, 0); -} - -static long do_compat_pwritev64(unsigned long fd, - const struct compat_iovec __user *vec, - unsigned long vlen, loff_t pos, rwf_t flags) -{ - struct fd f; - ssize_t ret; - - if (pos < 0) - return -EINVAL; - f = fdget(fd); - if (!f.file) - return -EBADF; - ret = -ESPIPE; - if (f.file->f_mode & FMODE_PWRITE) - ret = compat_writev(f.file, vec, vlen, &pos, flags); - fdput(f); - return ret; + return do_writev(fd, vec, vlen, 0); } #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, unsigned long, vlen, loff_t, pos) { - return do_compat_pwritev64(fd, vec, vlen, pos, 0); + return do_pwritev(fd, vec, vlen, pos, 0); } #endif COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *,vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high) { loff_t pos = ((loff_t)pos_high << 32) | pos_low; - return do_compat_pwritev64(fd, vec, vlen, pos, 0); + return do_pwritev(fd, vec, vlen, pos, 0); } #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 COMPAT_SYSCALL_DEFINE5(pwritev64v2, unsigned long, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *, vec, unsigned long, vlen, loff_t, pos, rwf_t, flags) { if (pos == -1) - return do_compat_writev(fd, vec, vlen, flags); - - return do_compat_pwritev64(fd, vec, vlen, pos, flags); + return do_writev(fd, vec, vlen, flags); + return do_pwritev(fd, vec, vlen, pos, flags); } #endif COMPAT_SYSCALL_DEFINE6(pwritev2, compat_ulong_t, fd, - const struct compat_iovec __user *,vec, + const struct iovec __user *,vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high, rwf_t, flags) { loff_t pos = ((loff_t)pos_high << 32) | pos_low; if (pos == -1) - return do_compat_writev(fd, vec, vlen, flags); - - return do_compat_pwritev64(fd, vec, vlen, pos, flags); + return do_writev(fd, vec, vlen, flags); + return do_pwritev(fd, vec, vlen, pos, flags); } - -#endif +#endif /* CONFIG_COMPAT */ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count, loff_t max) From patchwork Fri Sep 18 12:45:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784893 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A56D112E for ; Fri, 18 Sep 2020 12:46:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 568F423600 for ; Fri, 18 Sep 2020 12:46:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="PYRCSk1P" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726828AbgIRMqS (ORCPT ); Fri, 18 Sep 2020 08:46:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726749AbgIRMpx (ORCPT ); Fri, 18 Sep 2020 08:45:53 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30386C061788; Fri, 18 Sep 2020 05:45:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=0ayfAaSqizeJ1SF3mkyRKUWptEcabgutUx7Iqg6Kv38=; b=PYRCSk1Pf5PDSaYp3ja/j7t1VH 0r14l7w3u5hTgbkaMrae6qfnBkZX/wO1Q3fsdiTANbZoJrG3E0Ywm6R+22GQQrU0pirIXsR1s66T6 sbiTFXfBXRcHSPXBxe6xkStA6TIh7/K0ajdFXavWZafyQdBflt8mPKFiiMmb2afM+IMZh+bel166t HhDMVy83Pa6Ae4z3W0SSpDzF2iL2PKvfFSXUccqtgGAbAoZjh2IHkcmmaV1AVOPFr8Ae8RCz1Fnyt y3LW3hdn4IMGyuzOVd0cxCbx7DMT5ciKDDCOW1pYJ1ROYShGK68y9fsO8VSdHugmktY0r6tY15TET A3adHgIA==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFln-0008Tc-Qe; Fri, 18 Sep 2020 12:45:44 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 6/9] fs: remove the compat readv/writev syscalls Date: Fri, 18 Sep 2020 14:45:30 +0200 Message-Id: <20200918124533.3487701-7-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Now that import_iovec handles compat iovecs, the native readv and writev syscalls can be used for the compat case as well. Signed-off-by: Christoph Hellwig --- arch/arm64/include/asm/unistd32.h | 4 ++-- arch/mips/kernel/syscalls/syscall_n32.tbl | 4 ++-- arch/mips/kernel/syscalls/syscall_o32.tbl | 4 ++-- arch/parisc/kernel/syscalls/syscall.tbl | 4 ++-- arch/powerpc/kernel/syscalls/syscall.tbl | 4 ++-- arch/s390/kernel/syscalls/syscall.tbl | 4 ++-- arch/sparc/kernel/syscalls/syscall.tbl | 4 ++-- arch/x86/entry/syscall_x32.c | 2 ++ arch/x86/entry/syscalls/syscall_32.tbl | 4 ++-- arch/x86/entry/syscalls/syscall_64.tbl | 4 ++-- fs/read_write.c | 14 -------------- include/linux/compat.h | 4 ---- include/uapi/asm-generic/unistd.h | 4 ++-- tools/include/uapi/asm-generic/unistd.h | 4 ++-- tools/perf/arch/powerpc/entry/syscalls/syscall.tbl | 4 ++-- tools/perf/arch/s390/entry/syscalls/syscall.tbl | 4 ++-- tools/perf/arch/x86/entry/syscalls/syscall_64.tbl | 4 ++-- 17 files changed, 30 insertions(+), 46 deletions(-) diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 734860ac7cf9d5..4a236493dca5b9 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -301,9 +301,9 @@ __SYSCALL(__NR_flock, sys_flock) #define __NR_msync 144 __SYSCALL(__NR_msync, sys_msync) #define __NR_readv 145 -__SYSCALL(__NR_readv, compat_sys_readv) +__SYSCALL(__NR_readv, sys_readv) #define __NR_writev 146 -__SYSCALL(__NR_writev, compat_sys_writev) +__SYSCALL(__NR_writev, sys_writev) #define __NR_getsid 147 __SYSCALL(__NR_getsid, sys_getsid) #define __NR_fdatasync 148 diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index f9df9edb67a407..c99a92646f8ee9 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -25,8 +25,8 @@ 15 n32 ioctl compat_sys_ioctl 16 n32 pread64 sys_pread64 17 n32 pwrite64 sys_pwrite64 -18 n32 readv compat_sys_readv -19 n32 writev compat_sys_writev +18 n32 readv sys_readv +19 n32 writev sys_writev 20 n32 access sys_access 21 n32 pipe sysm_pipe 22 n32 _newselect compat_sys_select diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 195b43cf27c848..075064d10661bf 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -156,8 +156,8 @@ 142 o32 _newselect sys_select compat_sys_select 143 o32 flock sys_flock 144 o32 msync sys_msync -145 o32 readv sys_readv compat_sys_readv -146 o32 writev sys_writev compat_sys_writev +145 o32 readv sys_readv +146 o32 writev sys_writev 147 o32 cacheflush sys_cacheflush 148 o32 cachectl sys_cachectl 149 o32 sysmips __sys_sysmips diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index def64d221cd4fb..192abde0001d9d 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -159,8 +159,8 @@ 142 common _newselect sys_select compat_sys_select 143 common flock sys_flock 144 common msync sys_msync -145 common readv sys_readv compat_sys_readv -146 common writev sys_writev compat_sys_writev +145 common readv sys_readv +146 common writev sys_writev 147 common getsid sys_getsid 148 common fdatasync sys_fdatasync 149 common _sysctl sys_ni_syscall diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index c2d737ff2e7bec..6f1e2ecf0edad9 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -193,8 +193,8 @@ 142 common _newselect sys_select compat_sys_select 143 common flock sys_flock 144 common msync sys_msync -145 common readv sys_readv compat_sys_readv -146 common writev sys_writev compat_sys_writev +145 common readv sys_readv +146 common writev sys_writev 147 common getsid sys_getsid 148 common fdatasync sys_fdatasync 149 nospu _sysctl sys_ni_syscall diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index 10456bc936fb09..6101cf2e004cb4 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -134,8 +134,8 @@ 142 64 select sys_select - 143 common flock sys_flock sys_flock 144 common msync sys_msync sys_msync -145 common readv sys_readv compat_sys_readv -146 common writev sys_writev compat_sys_writev +145 common readv sys_readv sys_readv +146 common writev sys_writev sys_writev 147 common getsid sys_getsid sys_getsid 148 common fdatasync sys_fdatasync sys_fdatasync 149 common _sysctl - - diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index 4af114e84f2022..a87ddb282ab16f 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -149,8 +149,8 @@ 117 common getrusage sys_getrusage compat_sys_getrusage 118 common getsockopt sys_getsockopt sys_getsockopt 119 common getcwd sys_getcwd -120 common readv sys_readv compat_sys_readv -121 common writev sys_writev compat_sys_writev +120 common readv sys_readv +121 common writev sys_writev 122 common settimeofday sys_settimeofday compat_sys_settimeofday 123 32 fchown sys_fchown16 123 64 fchown sys_fchown diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c index 1583831f61a9df..aa321444a41f63 100644 --- a/arch/x86/entry/syscall_x32.c +++ b/arch/x86/entry/syscall_x32.c @@ -12,6 +12,8 @@ * Reuse the 64-bit entry points for the x32 versions that occupy different * slots in the syscall table. */ +#define __x32_sys_readv __x64_sys_readv +#define __x32_sys_writev __x64_sys_writev #define __x32_sys_getsockopt __x64_sys_getsockopt #define __x32_sys_setsockopt __x64_sys_setsockopt diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 9d11028736661b..54ab4beb517f25 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -156,8 +156,8 @@ 142 i386 _newselect sys_select compat_sys_select 143 i386 flock sys_flock 144 i386 msync sys_msync -145 i386 readv sys_readv compat_sys_readv -146 i386 writev sys_writev compat_sys_writev +145 i386 readv sys_readv +146 i386 writev sys_writev 147 i386 getsid sys_getsid 148 i386 fdatasync sys_fdatasync 149 i386 _sysctl sys_ni_syscall diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index f30d6ae9a6883c..b1e59957c5c51c 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -371,8 +371,8 @@ 512 x32 rt_sigaction compat_sys_rt_sigaction 513 x32 rt_sigreturn compat_sys_x32_rt_sigreturn 514 x32 ioctl compat_sys_ioctl -515 x32 readv compat_sys_readv -516 x32 writev compat_sys_writev +515 x32 readv sys_readv +516 x32 writev sys_writev 517 x32 recvfrom compat_sys_recvfrom 518 x32 sendmsg compat_sys_sendmsg 519 x32 recvmsg compat_sys_recvmsg diff --git a/fs/read_write.c b/fs/read_write.c index 9eb63c53da78f2..560d1b0bdef7bc 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1217,13 +1217,6 @@ SYSCALL_DEFINE6(pwritev2, unsigned long, fd, const struct iovec __user *, vec, * in_compat_syscall(). */ #ifdef CONFIG_COMPAT -COMPAT_SYSCALL_DEFINE3(readv, compat_ulong_t, fd, - const struct iovec __user *, vec, - compat_ulong_t, vlen) -{ - return do_readv(fd, vec, vlen, 0); -} - #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd, const struct iovec __user *, vec, @@ -1265,13 +1258,6 @@ COMPAT_SYSCALL_DEFINE6(preadv2, compat_ulong_t, fd, return do_preadv(fd, vec, vlen, pos, flags); } -COMPAT_SYSCALL_DEFINE3(writev, compat_ulong_t, fd, - const struct iovec __user *, vec, - compat_ulong_t, vlen) -{ - return do_writev(fd, vec, vlen, 0); -} - #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd, const struct iovec __user *, vec, diff --git a/include/linux/compat.h b/include/linux/compat.h index ad6dc56e8828d6..0ff848234df8ba 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -545,10 +545,6 @@ asmlinkage long compat_sys_getdents(unsigned int fd, /* fs/read_write.c */ asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); -asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, - const struct compat_iovec __user *vec, compat_ulong_t vlen); -asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, - const struct compat_iovec __user *vec, compat_ulong_t vlen); /* No generic prototype for pread64 and pwrite64 */ asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, const struct compat_iovec __user *vec, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index 995b36c2ea7d8a..211c9eacbda6eb 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -207,9 +207,9 @@ __SYSCALL(__NR_read, sys_read) #define __NR_write 64 __SYSCALL(__NR_write, sys_write) #define __NR_readv 65 -__SC_COMP(__NR_readv, sys_readv, compat_sys_readv) +__SC_COMP(__NR_readv, sys_readv, sys_readv) #define __NR_writev 66 -__SC_COMP(__NR_writev, sys_writev, compat_sys_writev) +__SC_COMP(__NR_writev, sys_writev, sys_writev) #define __NR_pread64 67 __SC_COMP(__NR_pread64, sys_pread64, compat_sys_pread64) #define __NR_pwrite64 68 diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h index 995b36c2ea7d8a..211c9eacbda6eb 100644 --- a/tools/include/uapi/asm-generic/unistd.h +++ b/tools/include/uapi/asm-generic/unistd.h @@ -207,9 +207,9 @@ __SYSCALL(__NR_read, sys_read) #define __NR_write 64 __SYSCALL(__NR_write, sys_write) #define __NR_readv 65 -__SC_COMP(__NR_readv, sys_readv, compat_sys_readv) +__SC_COMP(__NR_readv, sys_readv, sys_readv) #define __NR_writev 66 -__SC_COMP(__NR_writev, sys_writev, compat_sys_writev) +__SC_COMP(__NR_writev, sys_writev, sys_writev) #define __NR_pread64 67 __SC_COMP(__NR_pread64, sys_pread64, compat_sys_pread64) #define __NR_pwrite64 68 diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl index 3ca6fe057a0b1f..46be68029587f9 100644 --- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl @@ -189,8 +189,8 @@ 142 common _newselect sys_select compat_sys_select 143 common flock sys_flock 144 common msync sys_msync -145 common readv sys_readv compat_sys_readv -146 common writev sys_writev compat_sys_writev +145 common readv sys_readv +146 common writev sys_writev 147 common getsid sys_getsid 148 common fdatasync sys_fdatasync 149 nospu _sysctl sys_ni_syscall diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl index 6a0bbea225db0d..fb5e61ce9d5838 100644 --- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl @@ -134,8 +134,8 @@ 142 64 select sys_select - 143 common flock sys_flock sys_flock 144 common msync sys_msync compat_sys_msync -145 common readv sys_readv compat_sys_readv -146 common writev sys_writev compat_sys_writev +145 common readv sys_readv +146 common writev sys_writev 147 common getsid sys_getsid sys_getsid 148 common fdatasync sys_fdatasync sys_fdatasync 149 common _sysctl - - diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl index f30d6ae9a6883c..b1e59957c5c51c 100644 --- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl +++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl @@ -371,8 +371,8 @@ 512 x32 rt_sigaction compat_sys_rt_sigaction 513 x32 rt_sigreturn compat_sys_x32_rt_sigreturn 514 x32 ioctl compat_sys_ioctl -515 x32 readv compat_sys_readv -516 x32 writev compat_sys_writev +515 x32 readv sys_readv +516 x32 writev sys_writev 517 x32 recvfrom compat_sys_recvfrom 518 x32 sendmsg compat_sys_sendmsg 519 x32 recvmsg compat_sys_recvmsg From patchwork Fri Sep 18 12:45:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784889 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 654456CB for ; Fri, 18 Sep 2020 12:46:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C39A208B8 for ; Fri, 18 Sep 2020 12:46:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="UEfYzXZZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726830AbgIRMqS (ORCPT ); Fri, 18 Sep 2020 08:46:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39852 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726756AbgIRMpy (ORCPT ); Fri, 18 Sep 2020 08:45:54 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 325B5C06178B; Fri, 18 Sep 2020 05:45:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=WvVKZaY5AB7hAtdeNZdzckfozxkchoQJ2MiCsAJiU/o=; b=UEfYzXZZrYIkIGKM06IeIkYnFd LQJQ4RCBzxPFpwNiZLwc3188Z8CEfUJWi1ibpbbacqYpilR63xTTv1eK3C7FoV3X3dM9VdXnA3thT GK1+MdWGUho/9rBIrWhSJFonVzQ+bc4TpTvReK9PSUD1w8QNd/0lOwR4sz2jvLGJ5RQl1WRIChsE1 LamVUmUnDSIYjBfamw6Ugy5vEd20kZQFre/BhTEKWRkJS1Q5H1aDh3UwPPzSlu9L1NMK7la62fYG/ 3pKS9F2QNTykVkfV0TXwtxKosE9ljSwA+eGM+8vxTd641JJ/8i8OFvhZvMgnoF77qfGjAsCNoqdqY PRZHXKlA==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFlo-0008U1-Vo; Fri, 18 Sep 2020 12:45:45 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 7/9] fs: remove compat_sys_vmsplice Date: Fri, 18 Sep 2020 14:45:31 +0200 Message-Id: <20200918124533.3487701-8-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Now that import_iovec handles compat iovecs, the native vmsplice syscall can be used for the compat case as well. Signed-off-by: Christoph Hellwig --- arch/arm64/include/asm/unistd32.h | 2 +- arch/mips/kernel/syscalls/syscall_n32.tbl | 2 +- arch/mips/kernel/syscalls/syscall_o32.tbl | 2 +- arch/parisc/kernel/syscalls/syscall.tbl | 2 +- arch/powerpc/kernel/syscalls/syscall.tbl | 2 +- arch/s390/kernel/syscalls/syscall.tbl | 2 +- arch/sparc/kernel/syscalls/syscall.tbl | 2 +- arch/x86/entry/syscall_x32.c | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 2 +- arch/x86/entry/syscalls/syscall_64.tbl | 2 +- fs/splice.c | 57 +++++-------------- include/linux/compat.h | 4 -- include/uapi/asm-generic/unistd.h | 2 +- tools/include/uapi/asm-generic/unistd.h | 2 +- .../arch/powerpc/entry/syscalls/syscall.tbl | 2 +- .../perf/arch/s390/entry/syscalls/syscall.tbl | 2 +- .../arch/x86/entry/syscalls/syscall_64.tbl | 2 +- 17 files changed, 28 insertions(+), 62 deletions(-) diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 4a236493dca5b9..11dfae3a8563bd 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -697,7 +697,7 @@ __SYSCALL(__NR_sync_file_range2, compat_sys_aarch32_sync_file_range2) #define __NR_tee 342 __SYSCALL(__NR_tee, sys_tee) #define __NR_vmsplice 343 -__SYSCALL(__NR_vmsplice, compat_sys_vmsplice) +__SYSCALL(__NR_vmsplice, sys_vmsplice) #define __NR_move_pages 344 __SYSCALL(__NR_move_pages, compat_sys_move_pages) #define __NR_getcpu 345 diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index c99a92646f8ee9..5a39d4de0ac85b 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -278,7 +278,7 @@ 267 n32 splice sys_splice 268 n32 sync_file_range sys_sync_file_range 269 n32 tee sys_tee -270 n32 vmsplice compat_sys_vmsplice +270 n32 vmsplice sys_vmsplice 271 n32 move_pages compat_sys_move_pages 272 n32 set_robust_list compat_sys_set_robust_list 273 n32 get_robust_list compat_sys_get_robust_list diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 075064d10661bf..136efc6b8c5444 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -318,7 +318,7 @@ 304 o32 splice sys_splice 305 o32 sync_file_range sys_sync_file_range sys32_sync_file_range 306 o32 tee sys_tee -307 o32 vmsplice sys_vmsplice compat_sys_vmsplice +307 o32 vmsplice sys_vmsplice 308 o32 move_pages sys_move_pages compat_sys_move_pages 309 o32 set_robust_list sys_set_robust_list compat_sys_set_robust_list 310 o32 get_robust_list sys_get_robust_list compat_sys_get_robust_list diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index 192abde0001d9d..a9e184192caedd 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -330,7 +330,7 @@ 292 32 sync_file_range parisc_sync_file_range 292 64 sync_file_range sys_sync_file_range 293 common tee sys_tee -294 common vmsplice sys_vmsplice compat_sys_vmsplice +294 common vmsplice sys_vmsplice 295 common move_pages sys_move_pages compat_sys_move_pages 296 common getcpu sys_getcpu 297 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 6f1e2ecf0edad9..0d4985919ca34d 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -369,7 +369,7 @@ 282 common unshare sys_unshare 283 common splice sys_splice 284 common tee sys_tee -285 common vmsplice sys_vmsplice compat_sys_vmsplice +285 common vmsplice sys_vmsplice 286 common openat sys_openat compat_sys_openat 287 common mkdirat sys_mkdirat 288 common mknodat sys_mknodat diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index 6101cf2e004cb4..b5495a42814bd1 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -316,7 +316,7 @@ 306 common splice sys_splice sys_splice 307 common sync_file_range sys_sync_file_range compat_sys_s390_sync_file_range 308 common tee sys_tee sys_tee -309 common vmsplice sys_vmsplice compat_sys_vmsplice +309 common vmsplice sys_vmsplice sys_vmsplice 310 common move_pages sys_move_pages compat_sys_move_pages 311 common getcpu sys_getcpu sys_getcpu 312 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index a87ddb282ab16f..f1810c1a35caa5 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -38,7 +38,7 @@ 23 64 setuid sys_setuid 24 32 getuid sys_getuid16 24 64 getuid sys_getuid -25 common vmsplice sys_vmsplice compat_sys_vmsplice +25 common vmsplice sys_vmsplice 26 common ptrace sys_ptrace compat_sys_ptrace 27 common alarm sys_alarm 28 common sigaltstack sys_sigaltstack compat_sys_sigaltstack diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c index aa321444a41f63..a4840b9d50ad14 100644 --- a/arch/x86/entry/syscall_x32.c +++ b/arch/x86/entry/syscall_x32.c @@ -16,6 +16,7 @@ #define __x32_sys_writev __x64_sys_writev #define __x32_sys_getsockopt __x64_sys_getsockopt #define __x32_sys_setsockopt __x64_sys_setsockopt +#define __x32_sys_vmsplice __x64_sys_vmsplice #define __SYSCALL_64(nr, sym) diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 54ab4beb517f25..0fb2f172581e51 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -327,7 +327,7 @@ 313 i386 splice sys_splice 314 i386 sync_file_range sys_ia32_sync_file_range 315 i386 tee sys_tee -316 i386 vmsplice sys_vmsplice compat_sys_vmsplice +316 i386 vmsplice sys_vmsplice 317 i386 move_pages sys_move_pages compat_sys_move_pages 318 i386 getcpu sys_getcpu 319 i386 epoll_pwait sys_epoll_pwait diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index b1e59957c5c51c..642af919183de4 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -388,7 +388,7 @@ 529 x32 waitid compat_sys_waitid 530 x32 set_robust_list compat_sys_set_robust_list 531 x32 get_robust_list compat_sys_get_robust_list -532 x32 vmsplice compat_sys_vmsplice +532 x32 vmsplice sys_vmsplice 533 x32 move_pages compat_sys_move_pages 534 x32 preadv compat_sys_preadv64 535 x32 pwritev compat_sys_pwritev64 diff --git a/fs/splice.c b/fs/splice.c index 132d42b9871f9b..18d84544030b39 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -33,7 +33,6 @@ #include #include #include -#include #include #include "internal.h" @@ -1332,20 +1331,6 @@ static int vmsplice_type(struct fd f, int *type) * Currently we punt and implement it as a normal copy, see pipe_to_user(). * */ -static long do_vmsplice(struct file *f, struct iov_iter *iter, unsigned int flags) -{ - if (unlikely(flags & ~SPLICE_F_ALL)) - return -EINVAL; - - if (!iov_iter_count(iter)) - return 0; - - if (iov_iter_rw(iter) == WRITE) - return vmsplice_to_pipe(f, iter, flags); - else - return vmsplice_to_user(f, iter, flags); -} - SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov, unsigned long, nr_segs, unsigned int, flags) { @@ -1356,6 +1341,9 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov, struct fd f; int type; + if (unlikely(flags & ~SPLICE_F_ALL)) + return -EINVAL; + f = fdget(fd); error = vmsplice_type(f, &type); if (error) @@ -1363,40 +1351,21 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov, error = import_iovec(type, uiov, nr_segs, ARRAY_SIZE(iovstack), &iov, &iter); - if (error >= 0) { - error = do_vmsplice(f.file, &iter, flags); - kfree(iov); - } - fdput(f); - return error; -} + if (error < 0) + goto out_fdput; -#ifdef CONFIG_COMPAT -COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, iov32, - unsigned int, nr_segs, unsigned int, flags) -{ - struct iovec iovstack[UIO_FASTIOV]; - struct iovec *iov = iovstack; - struct iov_iter iter; - ssize_t error; - struct fd f; - int type; - - f = fdget(fd); - error = vmsplice_type(f, &type); - if (error) - return error; + if (!iov_iter_count(&iter)) + error = 0; + else if (iov_iter_rw(&iter) == WRITE) + error = vmsplice_to_pipe(f.file, &iter, flags); + else + error = vmsplice_to_user(f.file, &iter, flags); - error = import_iovec(type, (struct iovec __user *)iov32, nr_segs, - ARRAY_SIZE(iovstack), &iov, &iter); - if (error >= 0) { - error = do_vmsplice(f.file, &iter, flags); - kfree(iov); - } + kfree(iov); +out_fdput: fdput(f); return error; } -#endif SYSCALL_DEFINE6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, diff --git a/include/linux/compat.h b/include/linux/compat.h index 0ff848234df8ba..a7af6ed06cb000 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -597,10 +597,6 @@ asmlinkage long compat_sys_signalfd4(int ufd, const compat_sigset_t __user *sigmask, compat_size_t sigsetsize, int flags); -/* fs/splice.c */ -asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, - unsigned int nr_segs, unsigned int flags); - /* fs/stat.c */ asmlinkage long compat_sys_newfstatat(unsigned int dfd, const char __user *filename, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index 211c9eacbda6eb..f2dcb0d5703014 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -237,7 +237,7 @@ __SC_COMP(__NR_signalfd4, sys_signalfd4, compat_sys_signalfd4) /* fs/splice.c */ #define __NR_vmsplice 75 -__SC_COMP(__NR_vmsplice, sys_vmsplice, compat_sys_vmsplice) +__SYSCALL(__NR_vmsplice, sys_vmsplice) #define __NR_splice 76 __SYSCALL(__NR_splice, sys_splice) #define __NR_tee 77 diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h index 211c9eacbda6eb..f2dcb0d5703014 100644 --- a/tools/include/uapi/asm-generic/unistd.h +++ b/tools/include/uapi/asm-generic/unistd.h @@ -237,7 +237,7 @@ __SC_COMP(__NR_signalfd4, sys_signalfd4, compat_sys_signalfd4) /* fs/splice.c */ #define __NR_vmsplice 75 -__SC_COMP(__NR_vmsplice, sys_vmsplice, compat_sys_vmsplice) +__SYSCALL(__NR_vmsplice, sys_vmsplice) #define __NR_splice 76 __SYSCALL(__NR_splice, sys_splice) #define __NR_tee 77 diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl index 46be68029587f9..26f0347c15118b 100644 --- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl @@ -363,7 +363,7 @@ 282 common unshare sys_unshare 283 common splice sys_splice 284 common tee sys_tee -285 common vmsplice sys_vmsplice compat_sys_vmsplice +285 common vmsplice sys_vmsplice 286 common openat sys_openat compat_sys_openat 287 common mkdirat sys_mkdirat 288 common mknodat sys_mknodat diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl index fb5e61ce9d5838..02ad81f69bb7e3 100644 --- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl @@ -316,7 +316,7 @@ 306 common splice sys_splice compat_sys_splice 307 common sync_file_range sys_sync_file_range compat_sys_s390_sync_file_range 308 common tee sys_tee compat_sys_tee -309 common vmsplice sys_vmsplice compat_sys_vmsplice +309 common vmsplice sys_vmsplice sys_vmsplice 310 common move_pages sys_move_pages compat_sys_move_pages 311 common getcpu sys_getcpu compat_sys_getcpu 312 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl index b1e59957c5c51c..642af919183de4 100644 --- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl +++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl @@ -388,7 +388,7 @@ 529 x32 waitid compat_sys_waitid 530 x32 set_robust_list compat_sys_set_robust_list 531 x32 get_robust_list compat_sys_get_robust_list -532 x32 vmsplice compat_sys_vmsplice +532 x32 vmsplice sys_vmsplice 533 x32 move_pages compat_sys_move_pages 534 x32 preadv compat_sys_preadv64 535 x32 pwritev compat_sys_pwritev64 From patchwork Fri Sep 18 12:45:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784933 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4FEE36CB for ; Fri, 18 Sep 2020 12:47:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C02121D7B for ; Fri, 18 Sep 2020 12:47:09 +0000 (UTC) Authentication-Results: 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MTvMO80CAMIsp0nzL3GDBa440cCCufg3zbsHHtUblsHV72fSf1E0rhoi97bWfKn7eS0oebPAzIHkq wrSF7iG6LY0W3rF60iYpz47WPNErt8Px4DwMpeIJkVLjl/tzR4Qe2VUWSOZvluf4VzEsu5uHYTA2q WRno0KlyEMHy1jtWBSC1LInimjASXw6qsZkCFx2rGqSKwZi9Pj7SSjD3kWcmSl89UBSgP2Ibl8wAD qY7NHux21OrT9kBRolDTuF/ximeap+4TKVRYgJ/fxIWmFDmKFWNEulybwS51LwCgAouD18tW3unLr 1BR7Chbg==; Received: from [80.122.85.238] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kJFlq-0008UW-84; Fri, 18 Sep 2020 12:45:46 +0000 From: Christoph Hellwig To: Alexander Viro Cc: Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 8/9] mm: remove compat_process_vm_{readv,writev} Date: Fri, 18 Sep 2020 14:45:32 +0200 Message-Id: <20200918124533.3487701-9-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918124533.3487701-1-hch@lst.de> References: <20200918124533.3487701-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Now that import_iovec handles compat iovecs, the native syscalls can be used for the compat case as well. Signed-off-by: Christoph Hellwig --- arch/arm64/include/asm/unistd32.h | 4 +- arch/mips/kernel/syscalls/syscall_n32.tbl | 4 +- arch/mips/kernel/syscalls/syscall_o32.tbl | 4 +- arch/parisc/kernel/syscalls/syscall.tbl | 4 +- arch/powerpc/kernel/syscalls/syscall.tbl | 4 +- arch/s390/kernel/syscalls/syscall.tbl | 4 +- arch/sparc/kernel/syscalls/syscall.tbl | 4 +- arch/x86/entry/syscall_x32.c | 2 + arch/x86/entry/syscalls/syscall_32.tbl | 4 +- arch/x86/entry/syscalls/syscall_64.tbl | 4 +- include/linux/compat.h | 8 --- include/uapi/asm-generic/unistd.h | 6 +- mm/process_vm_access.c | 70 ------------------- tools/include/uapi/asm-generic/unistd.h | 6 +- .../arch/powerpc/entry/syscalls/syscall.tbl | 4 +- .../perf/arch/s390/entry/syscalls/syscall.tbl | 4 +- .../arch/x86/entry/syscalls/syscall_64.tbl | 4 +- 17 files changed, 30 insertions(+), 110 deletions(-) diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 11dfae3a8563bd..0c280a05f699bf 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -763,9 +763,9 @@ __SYSCALL(__NR_sendmmsg, compat_sys_sendmmsg) #define __NR_setns 375 __SYSCALL(__NR_setns, sys_setns) #define __NR_process_vm_readv 376 -__SYSCALL(__NR_process_vm_readv, compat_sys_process_vm_readv) +__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv) #define __NR_process_vm_writev 377 -__SYSCALL(__NR_process_vm_writev, compat_sys_process_vm_writev) +__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev) #define __NR_kcmp 378 __SYSCALL(__NR_kcmp, sys_kcmp) #define __NR_finit_module 379 diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 5a39d4de0ac85b..0bc2e0fcf1ee56 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -317,8 +317,8 @@ 306 n32 syncfs sys_syncfs 307 n32 sendmmsg compat_sys_sendmmsg 308 n32 setns sys_setns -309 n32 process_vm_readv compat_sys_process_vm_readv -310 n32 process_vm_writev compat_sys_process_vm_writev +309 n32 process_vm_readv sys_process_vm_readv +310 n32 process_vm_writev sys_process_vm_writev 311 n32 kcmp sys_kcmp 312 n32 finit_module sys_finit_module 313 n32 sched_setattr sys_sched_setattr diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 136efc6b8c5444..b408c13b934296 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -356,8 +356,8 @@ 342 o32 syncfs sys_syncfs 343 o32 sendmmsg sys_sendmmsg compat_sys_sendmmsg 344 o32 setns sys_setns -345 o32 process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -346 o32 process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +345 o32 process_vm_readv sys_process_vm_readv +346 o32 process_vm_writev sys_process_vm_writev 347 o32 kcmp sys_kcmp 348 o32 finit_module sys_finit_module 349 o32 sched_setattr sys_sched_setattr diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index a9e184192caedd..2015a5124b78ad 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -372,8 +372,8 @@ 327 common syncfs sys_syncfs 328 common setns sys_setns 329 common sendmmsg sys_sendmmsg compat_sys_sendmmsg -330 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -331 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +330 common process_vm_readv sys_process_vm_readv +331 common process_vm_writev sys_process_vm_writev 332 common kcmp sys_kcmp 333 common finit_module sys_finit_module 334 common sched_setattr sys_sched_setattr diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 0d4985919ca34d..66a472aa635d3f 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -449,8 +449,8 @@ 348 common syncfs sys_syncfs 349 common sendmmsg sys_sendmmsg compat_sys_sendmmsg 350 common setns sys_setns -351 nospu process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -352 nospu process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +351 nospu process_vm_readv sys_process_vm_readv +352 nospu process_vm_writev sys_process_vm_writev 353 nospu finit_module sys_finit_module 354 nospu kcmp sys_kcmp 355 common sched_setattr sys_sched_setattr diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index b5495a42814bd1..7485867a490bb2 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -347,8 +347,8 @@ 337 common clock_adjtime sys_clock_adjtime sys_clock_adjtime32 338 common syncfs sys_syncfs sys_syncfs 339 common setns sys_setns sys_setns -340 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -341 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +340 common process_vm_readv sys_process_vm_readv sys_process_vm_readv +341 common process_vm_writev sys_process_vm_writev sys_process_vm_writev 342 common s390_runtime_instr sys_s390_runtime_instr sys_s390_runtime_instr 343 common kcmp sys_kcmp sys_kcmp 344 common finit_module sys_finit_module sys_finit_module diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index f1810c1a35caa5..4a9365b2e340b2 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -406,8 +406,8 @@ 335 common syncfs sys_syncfs 336 common sendmmsg sys_sendmmsg compat_sys_sendmmsg 337 common setns sys_setns -338 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -339 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +338 common process_vm_readv sys_process_vm_readv +339 common process_vm_writev sys_process_vm_writev 340 32 kern_features sys_ni_syscall sys_kern_features 340 64 kern_features sys_kern_features 341 common kcmp sys_kcmp diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c index a4840b9d50ad14..f2fe0a33bcfdd5 100644 --- a/arch/x86/entry/syscall_x32.c +++ b/arch/x86/entry/syscall_x32.c @@ -17,6 +17,8 @@ #define __x32_sys_getsockopt __x64_sys_getsockopt #define __x32_sys_setsockopt __x64_sys_setsockopt #define __x32_sys_vmsplice __x64_sys_vmsplice +#define __x32_sys_process_vm_readv __x64_sys_process_vm_readv +#define __x32_sys_process_vm_writev __x64_sys_process_vm_writev #define __SYSCALL_64(nr, sym) diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 0fb2f172581e51..5fbe10ad8a23fc 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -358,8 +358,8 @@ 344 i386 syncfs sys_syncfs 345 i386 sendmmsg sys_sendmmsg compat_sys_sendmmsg 346 i386 setns sys_setns -347 i386 process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -348 i386 process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +347 i386 process_vm_readv sys_process_vm_readv +348 i386 process_vm_writev sys_process_vm_writev 349 i386 kcmp sys_kcmp 350 i386 finit_module sys_finit_module 351 i386 sched_setattr sys_sched_setattr diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 642af919183de4..347809649ba28f 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -395,8 +395,8 @@ 536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo 537 x32 recvmmsg compat_sys_recvmmsg_time64 538 x32 sendmmsg compat_sys_sendmmsg -539 x32 process_vm_readv compat_sys_process_vm_readv -540 x32 process_vm_writev compat_sys_process_vm_writev +539 x32 process_vm_readv sys_process_vm_readv +540 x32 process_vm_writev sys_process_vm_writev 541 x32 setsockopt sys_setsockopt 542 x32 getsockopt sys_getsockopt 543 x32 io_setup compat_sys_io_setup diff --git a/include/linux/compat.h b/include/linux/compat.h index a7af6ed06cb000..bbb065e09b058a 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -780,14 +780,6 @@ asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, int flags); asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, unsigned vlen, unsigned int flags); -asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, - const struct compat_iovec __user *lvec, - compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, - compat_ulong_t riovcnt, compat_ulong_t flags); -asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, - const struct compat_iovec __user *lvec, - compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, - compat_ulong_t riovcnt, compat_ulong_t flags); asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, const compat_uptr_t __user *argv, const compat_uptr_t __user *envp, int flags); diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index f2dcb0d5703014..c1dfe99c9c3f70 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -727,11 +727,9 @@ __SYSCALL(__NR_setns, sys_setns) #define __NR_sendmmsg 269 __SC_COMP(__NR_sendmmsg, sys_sendmmsg, compat_sys_sendmmsg) #define __NR_process_vm_readv 270 -__SC_COMP(__NR_process_vm_readv, sys_process_vm_readv, \ - compat_sys_process_vm_readv) +__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv) #define __NR_process_vm_writev 271 -__SC_COMP(__NR_process_vm_writev, sys_process_vm_writev, \ - compat_sys_process_vm_writev) +__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev) #define __NR_kcmp 272 __SYSCALL(__NR_kcmp, sys_kcmp) #define __NR_finit_module 273 diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index f21feebbd48f39..752bb724f10efa 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -14,10 +14,6 @@ #include #include -#ifdef CONFIG_COMPAT -#include -#endif - /** * process_vm_rw_pages - read/write pages from task specified * @pages: array of pointers to pages we want to copy @@ -307,69 +303,3 @@ SYSCALL_DEFINE6(process_vm_writev, pid_t, pid, { return process_vm_rw(pid, lvec, liovcnt, rvec, riovcnt, flags, 1); } - -#ifdef CONFIG_COMPAT - -static ssize_t -compat_process_vm_rw(compat_pid_t pid, - const struct compat_iovec __user *lvec, - unsigned long liovcnt, - const struct compat_iovec __user *rvec, - unsigned long riovcnt, - unsigned long flags, int vm_write) -{ - struct iovec iovstack_l[UIO_FASTIOV]; - struct iovec iovstack_r[UIO_FASTIOV]; - struct iovec *iov_l = iovstack_l; - struct iovec *iov_r = iovstack_r; - struct iov_iter iter; - ssize_t rc = -EFAULT; - int dir = vm_write ? WRITE : READ; - - if (flags != 0) - return -EINVAL; - - rc = import_iovec(dir, (const struct iovec __user *)lvec, liovcnt, - UIO_FASTIOV, &iov_l, &iter); - if (rc < 0) - return rc; - if (!iov_iter_count(&iter)) - goto free_iovecs; - rc = rw_copy_check_uvector(CHECK_IOVEC_ONLY, - (const struct iovec __user *)rvec, riovcnt, - UIO_FASTIOV, iovstack_r, &iov_r); - if (rc <= 0) - goto free_iovecs; - - rc = process_vm_rw_core(pid, &iter, iov_r, riovcnt, flags, vm_write); - -free_iovecs: - if (iov_r != iovstack_r) - kfree(iov_r); - kfree(iov_l); - return rc; -} - -COMPAT_SYSCALL_DEFINE6(process_vm_readv, compat_pid_t, pid, - const struct compat_iovec __user *, lvec, - compat_ulong_t, liovcnt, - const struct compat_iovec __user *, rvec, - compat_ulong_t, riovcnt, - compat_ulong_t, flags) -{ - return compat_process_vm_rw(pid, lvec, liovcnt, rvec, - riovcnt, flags, 0); -} - -COMPAT_SYSCALL_DEFINE6(process_vm_writev, compat_pid_t, pid, - const struct compat_iovec __user *, lvec, - compat_ulong_t, liovcnt, - const struct compat_iovec __user *, rvec, - compat_ulong_t, riovcnt, - compat_ulong_t, flags) -{ - return compat_process_vm_rw(pid, lvec, liovcnt, rvec, - riovcnt, flags, 1); -} - -#endif diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h index f2dcb0d5703014..c1dfe99c9c3f70 100644 --- a/tools/include/uapi/asm-generic/unistd.h +++ b/tools/include/uapi/asm-generic/unistd.h @@ -727,11 +727,9 @@ __SYSCALL(__NR_setns, sys_setns) #define __NR_sendmmsg 269 __SC_COMP(__NR_sendmmsg, sys_sendmmsg, compat_sys_sendmmsg) #define __NR_process_vm_readv 270 -__SC_COMP(__NR_process_vm_readv, sys_process_vm_readv, \ - compat_sys_process_vm_readv) +__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv) #define __NR_process_vm_writev 271 -__SC_COMP(__NR_process_vm_writev, sys_process_vm_writev, \ - compat_sys_process_vm_writev) +__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev) #define __NR_kcmp 272 __SYSCALL(__NR_kcmp, sys_kcmp) #define __NR_finit_module 273 diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl index 26f0347c15118b..a188f053cbf90a 100644 --- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl @@ -443,8 +443,8 @@ 348 common syncfs sys_syncfs 349 common sendmmsg sys_sendmmsg compat_sys_sendmmsg 350 common setns sys_setns -351 nospu process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -352 nospu process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +351 nospu process_vm_readv sys_process_vm_readv +352 nospu process_vm_writev sys_process_vm_writev 353 nospu finit_module sys_finit_module 354 nospu kcmp sys_kcmp 355 common sched_setattr sys_sched_setattr diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl index 02ad81f69bb7e3..c44c83032c3a04 100644 --- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl +++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl @@ -347,8 +347,8 @@ 337 common clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime 338 common syncfs sys_syncfs sys_syncfs 339 common setns sys_setns sys_setns -340 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv -341 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev +340 common process_vm_readv sys_process_vm_readv sys_process_vm_readv +341 common process_vm_writev sys_process_vm_writev sys_process_vm_writev 342 common s390_runtime_instr sys_s390_runtime_instr sys_s390_runtime_instr 343 common kcmp sys_kcmp compat_sys_kcmp 344 common finit_module sys_finit_module compat_sys_finit_module diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl index 642af919183de4..347809649ba28f 100644 --- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl +++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl @@ -395,8 +395,8 @@ 536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo 537 x32 recvmmsg compat_sys_recvmmsg_time64 538 x32 sendmmsg compat_sys_sendmmsg -539 x32 process_vm_readv compat_sys_process_vm_readv -540 x32 process_vm_writev compat_sys_process_vm_writev +539 x32 process_vm_readv sys_process_vm_readv +540 x32 process_vm_writev sys_process_vm_writev 541 x32 setsockopt sys_setsockopt 542 x32 getsockopt sys_getsockopt 543 x32 io_setup compat_sys_io_setup From patchwork Fri Sep 18 12:45:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11784895 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC32A14F6 for ; Fri, 18 Sep 2020 12:46:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0BA521481 for ; Fri, 18 Sep 2020 12:46:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="asfKxViQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726276AbgIRMqR (ORCPT ); Fri, 18 Sep 2020 08:46:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726753AbgIRMpy (ORCPT ); Fri, 18 Sep 2020 08:45:54 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29B81C06178A; 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See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Now that import_iovec handles compat iovecs, the native version of keyctl_instantiate_key_iov can be used for the compat case as well. Signed-off-by: Christoph Hellwig --- security/keys/compat.c | 36 ++---------------------------------- security/keys/internal.h | 5 ----- security/keys/keyctl.c | 2 +- 3 files changed, 3 insertions(+), 40 deletions(-) diff --git a/security/keys/compat.c b/security/keys/compat.c index 7ae531db031cf8..1545efdca56227 100644 --- a/security/keys/compat.c +++ b/security/keys/compat.c @@ -11,38 +11,6 @@ #include #include "internal.h" -/* - * Instantiate a key with the specified compatibility multipart payload and - * link the key into the destination keyring if one is given. - * - * The caller must have the appropriate instantiation permit set for this to - * work (see keyctl_assume_authority). No other permissions are required. - * - * If successful, 0 will be returned. - */ -static long compat_keyctl_instantiate_key_iov( - key_serial_t id, - const struct compat_iovec __user *_payload_iov, - unsigned ioc, - key_serial_t ringid) -{ - struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; - struct iov_iter from; - long ret; - - if (!_payload_iov) - ioc = 0; - - ret = import_iovec(WRITE, (const struct iovec __user *)_payload_iov, - ioc, ARRAY_SIZE(iovstack), &iov, &from); - if (ret < 0) - return ret; - - ret = keyctl_instantiate_key_common(id, &from, ringid); - kfree(iov); - return ret; -} - /* * The key control system call, 32-bit compatibility version for 64-bit archs */ @@ -113,8 +81,8 @@ COMPAT_SYSCALL_DEFINE5(keyctl, u32, option, return keyctl_reject_key(arg2, arg3, arg4, arg5); case KEYCTL_INSTANTIATE_IOV: - return compat_keyctl_instantiate_key_iov( - arg2, compat_ptr(arg3), arg4, arg5); + return keyctl_instantiate_key_iov(arg2, compat_ptr(arg3), arg4, + arg5); case KEYCTL_INVALIDATE: return keyctl_invalidate_key(arg2); diff --git a/security/keys/internal.h b/security/keys/internal.h index 338a526cbfa516..9b9cf3b6fcbb4d 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -262,11 +262,6 @@ extern long keyctl_instantiate_key_iov(key_serial_t, const struct iovec __user *, unsigned, key_serial_t); extern long keyctl_invalidate_key(key_serial_t); - -struct iov_iter; -extern long keyctl_instantiate_key_common(key_serial_t, - struct iov_iter *, - key_serial_t); extern long keyctl_restrict_keyring(key_serial_t id, const char __user *_type, const char __user *_restriction); diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index 9febd37a168fd0..e26bbccda7ccee 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -1164,7 +1164,7 @@ static int keyctl_change_reqkey_auth(struct key *key) * * If successful, 0 will be returned. */ -long keyctl_instantiate_key_common(key_serial_t id, +static long keyctl_instantiate_key_common(key_serial_t id, struct iov_iter *from, key_serial_t ringid) {