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GET /api/1.1/patches/2227910/?format=api
{ "id": 2227910, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2227910/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424132824.27733-1-deller@kernel.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260424132824.27733-1-deller@kernel.org>", "date": "2026-04-24T13:28:24", "name": "linux-user: Fix CLONE_PARENT_SETTID when using fork-like clone", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "58cd30823e6f57b9288039023c9c5c915adfe93b", "submitter": { "id": 87076, "url": "http://patchwork.ozlabs.org/api/1.1/people/87076/?format=api", "name": "Helge Deller", "email": "deller@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424132824.27733-1-deller@kernel.org/mbox/", "series": [ { "id": 501364, "url": "http://patchwork.ozlabs.org/api/1.1/series/501364/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501364", "date": "2026-04-24T13:28:24", "name": "linux-user: Fix CLONE_PARENT_SETTID when using fork-like clone", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501364/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227910/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227910/checks/", "tags": {}, "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=sTyR4ZSf;\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 4g2DLn0Z0Sz1xvV\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 24 Apr 2026 23:28:49 +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 1wGGaF-0005ng-1r; Fri, 24 Apr 2026 09:28:39 -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 1wGGaD-0005jj-VT\n for qemu-devel@nongnu.org; Fri, 24 Apr 2026 09:28:37 -0400", "from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25])\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 1wGGaC-0001hX-CR\n for qemu-devel@nongnu.org; Fri, 24 Apr 2026 09:28:37 -0400", "from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n by tor.source.kernel.org (Postfix) with ESMTP id B7158600AE;\n Fri, 24 Apr 2026 13:28:34 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id B4B21C2BCB2;\n Fri, 24 Apr 2026 13:28:33 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n s=k20201202; t=1777037314;\n bh=pRFq87+S/2GHoFTTwGzGYtiaLb0u0S7BL4zKXOaqYx4=;\n h=From:To:Cc:Subject:Date:From;\n b=sTyR4ZSfjl3Tt109E1Z3CTQ6+iHGGtde1MV5mmZfBo4DvxY44TDSgxDPa8M0IykW3\n bPK0CgQPaGTCgngMEJUMVAhlMqWFmvAaVq/L6mMRCoOnWWI51ebgqunLtOAJcAD7sY\n LEGTP5nD/gjvxs3J/aRvlg09m7I0Jsc7UZlu0Ocw98zICNUozHAU2oN5p1lLPnGkj3\n zFjCMPnWvQRM7sKr/BTK/bbkjJ3QEy2tYGpwDBrnH3eSZqFJQjNoJ3+3rFzxLeQfip\n hwjpX6T6zu5Vk05c28p/z1YBi5z/d9JhLhtbxoqGMHrHOIP1uPJVp+atNsvf9PS04a\n xhn7vKVYLMuFw==", "From": "Helge Deller <deller@kernel.org>", "To": "qemu-devel@nongnu.org", "Cc": "Helge Deller <deller@gmx.de>", "Subject": "[PATCH] linux-user: Fix CLONE_PARENT_SETTID when using fork-like\n clone", "Date": "Fri, 24 Apr 2026 15:28:24 +0200", "Message-ID": "<20260424132824.27733-1-deller@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2600:3c04:e001:324:0:1991:8:25;\n envelope-from=deller@kernel.org; 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\nThe CLONE_PARENT_SETTID option requires the implementation to store the\nchild thread ID at the location pointed to by parent_tid in the parent's\nmemory.\n\nFix our implementation and move the code from the client side (where\nfork returned 0), to the parent side and store the return value from the\nfork call (which is the client TID) in the parent_tid pointer.\n\nResolves: https://gitlab.com/qemu-project/qemu/-/work_items/3340\nSigned-off-by: Helge Deller <deller@gmx.de>\n---\n linux-user/syscall.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)", "diff": "diff --git a/linux-user/syscall.c b/linux-user/syscall.c\nindex d0390e04b4..910a4da0a6 100644\n--- a/linux-user/syscall.c\n+++ b/linux-user/syscall.c\n@@ -7050,8 +7050,6 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,\n the child process gets its own copy of the lock. */\n if (flags & CLONE_CHILD_SETTID)\n put_user_u32(sys_gettid(), child_tidptr);\n- if (flags & CLONE_PARENT_SETTID)\n- put_user_u32(sys_gettid(), parent_tidptr);\n ts = get_task_state(cpu);\n if (flags & CLONE_SETTLS)\n cpu_set_tls (env, newtls);\n@@ -7059,6 +7057,8 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,\n ts->child_tidptr = child_tidptr;\n } else {\n cpu_clone_regs_parent(env, flags);\n+ if (flags & CLONE_PARENT_SETTID)\n+ put_user_u32(ret, parent_tidptr);\n if (flags & CLONE_PIDFD) {\n int pid_fd = 0;\n #if defined(__NR_pidfd_open) && defined(TARGET_NR_pidfd_open)\n", "prefixes": [] }