From patchwork Fri Apr 24 20:57:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 11509455 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 F14A914B4 for ; Fri, 24 Apr 2020 21:03:00 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 82BCB20661 for ; Fri, 24 Apr 2020 21:03:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="NxdjAipN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 82BCB20661 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:52592 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jS5TO-0006Eh-Va for patchwork-qemu-devel@patchwork.kernel.org; Fri, 24 Apr 2020 17:02:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42964) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jS5Ok-0004zm-9z for qemu-devel@nongnu.org; Fri, 24 Apr 2020 16:58:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jS5Oj-000844-Le for qemu-devel@nongnu.org; Fri, 24 Apr 2020 16:58:10 -0400 Received: from mout.gmx.net ([212.227.15.15]:33309) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jS5Oj-0007y8-3Z for qemu-devel@nongnu.org; Fri, 24 Apr 2020 16:58:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1587761877; bh=Y7M5KzT+T5sJOC2naW5SJJl9NbH4rAG+3a3/TmjMdA8=; h=X-UI-Sender-Class:Date:From:To:Subject; b=NxdjAipNm5/X0NGbKXRaaF3YMPIXbnGj7UbUgsnVlrF47ll4GkxBDNx8m2amq521N cZtPnoplC3IZh1rrHvnYwNHXoW0HetdtqiokZRKy7JwftdlXdSo0Y1rCWQQ9fTH23S 0hz67TjdLbS+clqLaybw998OS5HS/4nsueItIUQA= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from ls3530.fritz.box ([92.116.144.192]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1Mg6Zw-1j0AUl0mzO-00hiXZ; Fri, 24 Apr 2020 22:57:57 +0200 Date: Fri, 24 Apr 2020 22:57:55 +0200 From: Helge Deller To: Riku Voipio , Laurent Vivier , qemu-devel@nongnu.org Subject: [PATCH] linux-user: Drop unnecessary check in dup3 syscall Message-ID: <20200424205755.GA26282@ls3530.fritz.box> MIME-Version: 1.0 Content-Disposition: inline X-Provags-ID: V03:K1:asytLhm1AYbVB71ENR2XnH6r/+ajXAPZgEy30GTIDP8LxXOvhfs zakPbwy1o31rcMcbex3vdkTHhNs8iwgDwKrtnmGyIQctPwn+a1ZorZtIEKArrGB7D2vRWnR o/za+zl1KgQeHktG2wCP2JDTwT1pIRDzCCByOpVKlmVa61/9Nc27KRzZUFSk3C5jXPlp5f5 fDHd1969w7qMu1GFJOZAQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:7JLBFDNXn+E=:3SPG7gWvGYQB37voW8dbWO RBMmKEgjtTH64BnH3+2XlbFT2qnOMglPXuNmBWSq2I/OnJFzIAqdlc8QX11nbWkl9ABAnHTWk W+G1qC3E2KyNaql9m2Miu/AsHCHUwYfY6+kvXKD8s1BuUY/qXpMqPzQPk0smIFTBYIBsupiWv d5NaA+IKYKDEFDboQev/Mbp2dOuf1CzuAc6T/QMEVRaXbjJjtgkOTo6XoUpaMhgBQ2tSLpfhi 8uftFIKC3Ci/rOxXnFuuAtavOCuQhv3zNMx1ktOhcvjGYMSOpXTYfSed3roZYaL8MR6U4068a Q/ye+ex7T98vwsS5qNJwxbR/qlpXM99Xi4W6LOscV2qPq9J4d4OGEQC31lu8Eu89ANYVFfk7R aY06cBL9iGtCEuRV2I1VO3Y3mo3Aof1MNC8BUUfyeHCzkRfGTR8UW0Me/4/pg4TevhYFgEUWm vE5HDUcqyqeqdfMFV9db1oWPlnOwijzQJh0fTy9V1jDgUmNrIHezEsG2bNsMZOx1sNr/AdEg0 6eBTRTB/AG+vgszwT5fEdtbfpbI6PVLj6CzEwfK/6oo4jHNizQwMbBv9aPj2SXERyHM2FcYgq oaYsepcnnWUb0iwDSbB2ekT5SdRESpZBafDH7m14E5cQeOPAv8loybwfbsMELKY28pM7Zhm5x DhKAGFQZ+YqoZ7eZLL9rTL06/wqclfMON4XPLZtPLVzcQWupR8aZAAo9QNi1Ra84H80JsA2MP KKwKsl+11ImSNhKVK8R+WBM/U8kITxZK14ilHM5u4fYRdOUlhVTf60a7l8XAipgHT90viZBqF axlWEDa3LS+Z63P4CQPhAAmvS6jxHasjJqsClLvNfpHBEqqcuHXPWFxE5/OCh+dziJfe/TuBn tu9ahFW4WV0N1PSWjop2n06NGGuP6XfsO74AY4oWIWbC2pF+NxMkouTHBvVOasYLURnqqOGR/ a0TxoaVAtN5aP2j/WuzYS3Gxk3+K7IJiE8khTfpnXF8foRrUjpzCmJ5olk6K6xUFx9t4McAlf EONHGcTKNHj1U43P5561DdYSwwscNG7h++iotPwmHz0BPcdtaaCH4ynUmtgZQXlvj5/qqMsNj GJEkShjMezxrV/vKHTVRubJzRElGtPr8XWMjt5JXysmQvvsoRjFrHj51BegNuKHgcepncHnzA k/wHOXugVkn3hw8UM53R36iE/b0l5pu5zv4ac1j4jdNDo9Pm7rxxVMxr6gVDQ5l+Y6Xfil34f uCIkQVXI49lbWD0y9 Received-SPF: pass client-ip=212.227.15.15; envelope-from=deller@gmx.de; helo=mout.gmx.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/24 16:58:07 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 212.227.15.15 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Drop the extra check in dup3() if anything other than FD_CLOEXEC (aka O_CLOEXEC) was given. Instead simply rely on any error codes returned by the host dup3() syscall. Signed-off-by: Helge Deller diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 05f03919ff..ebf0d38321 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8301,12 +8310,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, #if defined(CONFIG_DUP3) && defined(TARGET_NR_dup3) case TARGET_NR_dup3: { - int host_flags; - - if ((arg3 & ~TARGET_O_CLOEXEC) != 0) { - return -EINVAL; - } - host_flags = target_to_host_bitmask(arg3, fcntl_flags_tbl); + int host_flags = target_to_host_bitmask(arg3, fcntl_flags_tbl); ret = get_errno(dup3(arg1, arg2, host_flags)); if (ret >= 0) { fd_trans_dup(arg1, arg2);