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GET /api/patches/2230889/?format=api
{ "id": 2230889, "url": "http://patchwork.ozlabs.org/api/patches/2230889/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430071922.15341-4-deller@kernel.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260430071922.15341-4-deller@kernel.org>", "list_archive_url": null, "date": "2026-04-30T07:19:21", "name": "[PULL,3/4] linux-user: Allow getsockopt() with NULL optval address", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "7d4c89f76fddf5fc4b59bba6b9d528514b4e948e", "submitter": { "id": 87076, "url": "http://patchwork.ozlabs.org/api/people/87076/?format=api", "name": "Helge Deller", "email": "deller@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430071922.15341-4-deller@kernel.org/mbox/", "series": [ { "id": 502224, "url": "http://patchwork.ozlabs.org/api/series/502224/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502224", "date": "2026-04-30T07:19:19", "name": "[PULL,1/4] linux-user: Add missing CDROM ioctls", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502224/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230889/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230889/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=DQNWEbmg;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g5ltw1Wpgz1yGq\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 30 Apr 2026 17:20:24 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wILgN-0003ZR-8J; Thu, 30 Apr 2026 03:19:35 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <deller@kernel.org>) id 1wILgL-0003YY-40\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 03:19:33 -0400", "from tor.source.kernel.org ([172.105.4.254])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <deller@kernel.org>) id 1wILgJ-00013J-Ey\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 03:19:32 -0400", "from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n by tor.source.kernel.org (Postfix) with ESMTP id AF94D61145;\n Thu, 30 Apr 2026 07:19:30 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id 52D4CC2BCB4;\n Thu, 30 Apr 2026 07:19:29 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n s=k20201202; t=1777533570;\n bh=2zHQrRG0goJ++Rc1kkqjW925uojIri28hDyU+Vdmp0E=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=DQNWEbmgiLeqf+qHyLRMuCeUJYh43dPEyOd7H+o/oqDKy2y4OhwfFHM7bblXV0Psm\n BD+SGyWt/1bRU7e644sTdQbdmF6ZjV4xX9vdC/b2WFcxW4ecKvz9gh1UJDkJZt0SeG\n au2indjQz6DKV0RijkTzTTq8aSkm1NT9ppTPwbUt1TjI++qmlbqI+2Em4aVDYnJYhX\n fudT1OYOgzSyNd7RgpZaqxH4vnOXEgbtVFipQaOX+mKPCGJk+1vh0Ajc4e31xOdtTn\n iHDpcdO3E8P8RQlSEr9nc53eSSPKxJDgh3HrJMAQlDcyywN5GKi/ZsYuGktc7lWKHk\n /cNI1jFmG2AFA==", "From": "Helge Deller <deller@kernel.org>", "To": "qemu-devel@nongnu.org", "Cc": "Laurent Vivier <laurent@vivier.eu>, Helge Deller <deller@gmx.de>,\n Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>", "Subject": "[PULL 3/4] linux-user: Allow getsockopt() with NULL optval address", "Date": "Thu, 30 Apr 2026 09:19:21 +0200", "Message-ID": "<20260430071922.15341-4-deller@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260430071922.15341-1-deller@kernel.org>", "References": "<20260430071922.15341-1-deller@kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=172.105.4.254; envelope-from=deller@kernel.org;\n helo=tor.source.kernel.org", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Helge Deller <deller@gmx.de>\n\nSome programs test availability of socket options by asking for the\nvalue with an NULL optval address, which currenrly always trigger an\nEFAULT in qemu. Fix it by allowing a NULL address, in the same manner\nas the Linux kernel on physical machines.\n\nResolves: https://gitlab.com/qemu-project/qemu/-/work_items/2390\nSigned-off-by: Helge Deller <deller@gmx.de>\nReviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>\n---\n linux-user/syscall.c | 50 +++++++++++++++++++++++++-------------------\n 1 file changed, 28 insertions(+), 22 deletions(-)", "diff": "diff --git a/linux-user/syscall.c b/linux-user/syscall.c\nindex 4594909242..d68edb7afd 100644\n--- a/linux-user/syscall.c\n+++ b/linux-user/syscall.c\n@@ -2644,6 +2644,10 @@ get_timeout:\n if (ret < 0) {\n return ret;\n }\n+ /* special case: destination address is NULL, return 0 */\n+ if (optval_addr) {\n+ len = 0;\n+ }\n if (len == sizeof(struct target__kernel_sock_timeval)) {\n if (copy_to_user_timeval64(optval_addr, &tv)) {\n return -TARGET_EFAULT;\n@@ -2844,7 +2848,10 @@ get_timeout:\n }\n if (len > lv)\n len = lv;\n- if (len == 4) {\n+ if (!optval_addr) {\n+ /* writing to NULL does not give error */\n+ len = 0;\n+ } else if (len == 4) {\n if (put_user_u32(val, optval_addr))\n return -TARGET_EFAULT;\n } else {\n@@ -2877,18 +2884,24 @@ get_timeout:\n return -TARGET_EINVAL;\n lv = sizeof(lv);\n ret = get_errno(getsockopt(sockfd, level, optname, &val, &lv));\n+write_ret:\n if (ret < 0)\n return ret;\n- if (len < sizeof(int) && len > 0 && val >= 0 && val < 255) {\n+ if (!optval_addr) {\n+ len = 0;\n+ } else if (len < sizeof(int) && len > 0 && val >= 0 && val < 255) {\n len = 1;\n- if (put_user_u32(len, optlen)\n- || put_user_u8(val, optval_addr))\n+ if (put_user_u8(val, optval_addr)) {\n return -TARGET_EFAULT;\n+ }\n } else {\n if (len > sizeof(int))\n len = sizeof(int);\n- if (put_user_u32(len, optlen)\n- || put_user_u32(val, optval_addr))\n+ if (put_user_u32(val, optval_addr)) {\n+ return -TARGET_EFAULT;\n+ }\n+ }\n+ if (put_user_u32(len, optlen)) {\n return -TARGET_EFAULT;\n }\n break;\n@@ -2939,20 +2952,7 @@ get_timeout:\n return -TARGET_EINVAL;\n lv = sizeof(lv);\n ret = get_errno(getsockopt(sockfd, level, optname, &val, &lv));\n- if (ret < 0)\n- return ret;\n- if (len < sizeof(int) && len > 0 && val >= 0 && val < 255) {\n- len = 1;\n- if (put_user_u32(len, optlen)\n- || put_user_u8(val, optval_addr))\n- return -TARGET_EFAULT;\n- } else {\n- if (len > sizeof(int))\n- len = sizeof(int);\n- if (put_user_u32(len, optlen)\n- || put_user_u32(val, optval_addr))\n- return -TARGET_EFAULT;\n- }\n+ goto write_ret;\n break;\n default:\n ret = -TARGET_ENOPROTOOPT;\n@@ -2986,8 +2986,14 @@ get_timeout:\n if (ret < 0) {\n return ret;\n }\n- if (put_user_u32(lv, optlen)\n- || put_user_u32(val, optval_addr)) {\n+ if (optval_addr) {\n+ if (put_user_u32(val, optval_addr)) {\n+ return -TARGET_EFAULT;\n+ }\n+ } else {\n+ lv = 0;\n+ }\n+ if (put_user_u32(lv, optlen)) {\n return -TARGET_EFAULT;\n }\n break;\n", "prefixes": [ "PULL", "3/4" ] }