From patchwork Mon Jul 20 12:47:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11673807 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 B881160D for ; Mon, 20 Jul 2020 12:52:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A022622D6E for ; Mon, 20 Jul 2020 12:52:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Ri8VLRhE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728834AbgGTMsM (ORCPT ); Mon, 20 Jul 2020 08:48:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728460AbgGTMsJ (ORCPT ); Mon, 20 Jul 2020 08:48:09 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6859FC0619D2; Mon, 20 Jul 2020 05:48:09 -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=qqSXdt/0/kfIYmhxAmEpiFRzMh1TsKqQoMELThw3G/I=; b=Ri8VLRhEKVWjMNRsh2yUT4emOf P0lFd6B/MInuauhmUppRaPEzw+xKr6XUx6WvwDMMh/NpYwTIXe6n71llcDe5D034yUkVOJMgRZ7fE oYodq0FEjAIe16P8s1uZzQtrVelmOgzfm9QKf3ls5XzHPbpsURnLhMYphR1+d4ZSXJSspJijbjQ+2 uoCZR6U+CnU3OhLHwnGxvwMvVRPbWYbRCZCzvAc+3EZy0qljIJfZPYF9RuiboWVvp2GQlI62qnWjg UmnNlPHh+sDoTHE4iUPtCkCKAZlMc8cgMmuX43OGc60EjnJ9a1S9bNgzrAzfIO/f+DhRWM5Ni3XIw JNzeulWQ==; Received: from [2001:4bb8:105:4a81:2a8f:15b1:2c3:7be7] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jxVCx-0004Wh-JK; Mon, 20 Jul 2020 12:47:53 +0000 From: Christoph Hellwig To: "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Alexey Kuznetsov , Hideaki YOSHIFUJI , Eric Dumazet Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, linux-sctp@vger.kernel.org, linux-hams@vger.kernel.org, linux-bluetooth@vger.kernel.org, bridge@lists.linux-foundation.org, linux-can@vger.kernel.org, dccp@vger.kernel.org, linux-decnet-user@lists.sourceforge.net, linux-wpan@vger.kernel.org, linux-s390@vger.kernel.org, mptcp@lists.01.org, lvs-devel@vger.kernel.org, rds-devel@oss.oracle.com, linux-afs@lists.infradead.org, tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org Subject: [PATCH 04/24] net: switch copy_bpf_fprog_from_user to sockptr_t Date: Mon, 20 Jul 2020 14:47:17 +0200 Message-Id: <20200720124737.118617-5-hch@lst.de> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200720124737.118617-1-hch@lst.de> References: <20200720124737.118617-1-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 Sender: linux-wpan-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig --- include/linux/filter.h | 3 ++- net/core/filter.c | 6 +++--- net/core/sock.c | 6 ++++-- net/packet/af_packet.c | 4 ++-- 4 files changed, 11 insertions(+), 8 deletions(-) diff --git a/include/linux/filter.h b/include/linux/filter.h index 4d049c8e1fbeaa..87954ef126df77 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -1276,6 +1277,6 @@ struct bpf_sockopt_kern { s32 retval; }; -int copy_bpf_fprog_from_user(struct sock_fprog *dst, void __user *src, int len); +int copy_bpf_fprog_from_user(struct sock_fprog *dst, sockptr_t src, int len); #endif /* __LINUX_FILTER_H__ */ diff --git a/net/core/filter.c b/net/core/filter.c index 2bf6624796d86f..4cc1d381a273fd 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -77,14 +77,14 @@ #include #include -int copy_bpf_fprog_from_user(struct sock_fprog *dst, void __user *src, int len) +int copy_bpf_fprog_from_user(struct sock_fprog *dst, sockptr_t src, int len) { if (in_compat_syscall()) { struct compat_sock_fprog f32; if (len != sizeof(f32)) return -EINVAL; - if (copy_from_user(&f32, src, sizeof(f32))) + if (copy_from_sockptr(&f32, src, sizeof(f32))) return -EFAULT; memset(dst, 0, sizeof(*dst)); dst->len = f32.len; @@ -92,7 +92,7 @@ int copy_bpf_fprog_from_user(struct sock_fprog *dst, void __user *src, int len) } else { if (len != sizeof(*dst)) return -EINVAL; - if (copy_from_user(dst, src, sizeof(*dst))) + if (copy_from_sockptr(dst, src, sizeof(*dst))) return -EFAULT; } diff --git a/net/core/sock.c b/net/core/sock.c index d828bfe1c47dfa..91224709869389 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1062,7 +1062,8 @@ int sock_setsockopt(struct socket *sock, int level, int optname, case SO_ATTACH_FILTER: { struct sock_fprog fprog; - ret = copy_bpf_fprog_from_user(&fprog, optval, optlen); + ret = copy_bpf_fprog_from_user(&fprog, USER_SOCKPTR(optval), + optlen); if (!ret) ret = sk_attach_filter(&fprog, sk); break; @@ -1083,7 +1084,8 @@ int sock_setsockopt(struct socket *sock, int level, int optname, case SO_ATTACH_REUSEPORT_CBPF: { struct sock_fprog fprog; - ret = copy_bpf_fprog_from_user(&fprog, optval, optlen); + ret = copy_bpf_fprog_from_user(&fprog, USER_SOCKPTR(optval), + optlen); if (!ret) ret = sk_reuseport_attach_filter(&fprog, sk); break; diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index c240fb5de3f014..d8d4f78f78e451 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1536,7 +1536,7 @@ static void __fanout_set_data_bpf(struct packet_fanout *f, struct bpf_prog *new) } } -static int fanout_set_data_cbpf(struct packet_sock *po, char __user *data, +static int fanout_set_data_cbpf(struct packet_sock *po, sockptr_t data, unsigned int len) { struct bpf_prog *new; @@ -1584,7 +1584,7 @@ static int fanout_set_data(struct packet_sock *po, char __user *data, { switch (po->fanout->type) { case PACKET_FANOUT_CBPF: - return fanout_set_data_cbpf(po, data, len); + return fanout_set_data_cbpf(po, USER_SOCKPTR(data), len); case PACKET_FANOUT_EBPF: return fanout_set_data_ebpf(po, data, len); default: