From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D20F43BED46 for ; Thu, 7 May 2026 13:25:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.126.134 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778160314; cv=none; b=FeiGBko2bUYnThimsvAyqfdjXzH5fl0myiQ3YbRTWEU8tZIpaXsD5o9w8PjjhizUFkpRO3P4Zh3lMfr+wmZk6ryoNsUkYyudxkIV3hNnHZWyXP5pxKzo5aBAtRueMEYaSPZfhDkKvaZZwdAFfcWobv6sSEWFsC3fndNT2HeCHU8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778160314; c=relaxed/simple; bh=qTItznoU94V0CeeEb5nErvxtGW7wrjMY/t01uw2XW3A=; h=Date:Message-ID:From:To:Cc:Subject:Content-Type; b=rH+uKCiiWBcuaVFEjenMFJSpNl3yMex10Q/6hOWhW0pDC5i6lyRTTYHRPaiC+a8KqR43IFXnkF2+dlE4AHxF0bPYIOD169c+xlrUKFznfTi9p9Y7iInruY4s+C13SZdsllEMjD2Q/ap6S948zMsiI6wGkRTmrQD4+mlaJzssMUc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=desarrollaria.com; spf=pass smtp.mailfrom=desarrollaria.com; dkim=pass (2048-bit key) header.d=desarrollaria.com header.i=y2k@desarrollaria.com header.b=iHeDkrj1; arc=none smtp.client-ip=212.227.126.134 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=desarrollaria.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=desarrollaria.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=desarrollaria.com header.i=y2k@desarrollaria.com header.b="iHeDkrj1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=desarrollaria.com; s=s1-ionos; t=1778160293; x=1778765093; i=y2k@desarrollaria.com; bh=4CmqBC9NUzJTNtaNgrWY4Vdsvo9gmBbpyr2Bb+5L2kw=; h=X-UI-Sender-Class:Date:Message-ID:From:To:Cc:Subject: Content-Type:cc:content-transfer-encoding:content-type:date:from: message-id:mime-version:reply-to:subject:to; b=iHeDkrj13nCy/iK7MCYYjg8ZcwpQ9ycCicKWXFHdOxu8ZyPzOyh4xlsWJ75a0FW2 webOacCTLENEhGVMLAU6tqsPvq4J7VEg/bBC3zJG5jRPyW+0IbqARjxk8TdZ20LUY D9T2wB74jsLRyI9VfRx7sKhKHrro+zk5FTlyjSTqlgAnDnevLGmzMxdqdVsuLHJds gogJQR8Sf+IIjPx/r7l8P4xa0A0weAVzxdv+I74nYnKS6mjSQYLJmupLxoyirDjbF 9BFhBraasFG8/BJPKkEprAldZ9HzdIZiksUU6kgRV5ErLiomdwABxjT85MgnrIeE0 nRtyD2WkPa/HsvHhFA== X-UI-Sender-Class: 55c96926-9e95-11ee-ae09-1f7a4046a0f6 Received: from client.hidden.invalid by mrelayeu.kundenserver.de (mreue010 [212.227.15.134]) with ESMTPSA (Nemesis) id 1MaIrN-1vpRlg2SP7-00MPzH; Thu, 07 May 2026 15:24:53 +0200 Date: Thu, 07 May 2026 15:24:52 +0200 Message-ID: From: y2k To: oleg@redhat.com Cc: brauner@kernel.org, linux-kernel@vger.kernel.org, syzkaller@googlegroups.com Subject: WARNING in do_notify_parent (kernel/signal.c:2174) Content-Type: text/plain; charset=UTF-8 X-Provags-ID: V03:K1:8LkhgxMxxWLr3A6ZlV65W0QQqJYuEeW6DK+nLXkQlEDl1v4i2Hx BamJglkj3+MLRszuNRUu7l9EXRHG2+DODmmKGZ+l7b7Niz6Cr0Ds+iyJ9rqJNdZy5jySfDT 2rausXWAr2YrHyUx8V3kc6IbrSH0Zb25BmAalY5WywUAk7CTnDpEVe+bLDEda7euu8oneeJ AB9L+YsI8V0QwpJGkVPLA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:TC8g8xE0es4=;hMTBGyUOv2l/n1jpNu6Jd86VVUm +foisBBFtvgS4WvKyraxpNoS9PN0aB/J5/CJLJx5fKAusZXSC/H5hoOOKm9zyu8Y5tdRRW6cr 3uJREyZJdXJkHbGEiKyZ2+VoWkZsxX8toxBHOTElP/CQyAe7Phi8PsN8zyuPBEUSzpa3qNcYl nCImlEq6Jq2jJXv16/mkjpRLHkgfXDjSEnDzP7dAeHVlK4d623K1C6TyhcOjEJ3PAD68Mfb/q xmZmOncC6MOo8Mh0xMAbRPP8zdavE8uIJuQBpsdtu6qend2KHMk5jg1LrMmqr83xakLplfA96 7iA/wPE6o8rmrmEUOWQnadBKw1QsBnjhGLnkjnhy2zLKHl6ru65+OdFpkiWuFrDEDEV+BaekS IDAg8Vo7kuPzlDaIGb4Mp7HYnCALV8z/GsU0SfYTXHjLyfVyVSmayThD7MlQ1Cmd4kTJucs7e r0YKX143S+xxxrYaRDts832prCMbUrDIb5Pgsu57M6R1kch5Z9JMYMPDQmpVXGcDfoLh+I/Tz MCXjcZ0ql0da8JjZPCY417xMoEY15fH94RxI/XQQooyyrdv9BEY13bTI9XJ2Cwc7yUcuX2gq8 SPNXQRJBFuZFT7w0i9Chs2Nqr/DVnoO6JOhyy5ZnkXizai3LaJpXSVFtcpy7mPXaycE8u4rZh hypbFhiau7UMEAja1IcXIySaw37kWGJshdjQL1/u1r0+xBDfZZYSU5eGryU1WJTDz/5JVOJvt fvhHogzQxloz6a4W4RYrj51ufeBNhbVLPmgH/7XO5JqJf7NPJ3SY8TA7RwZ9A04a1zURAG2Qd nW9VYoMK1wGxE0U0N5ToAdWVbYYE+gd7aa3YiBC4gzHVYQs8Q4HWgmUEmb4vxPv4jOKrV1LsC eNSjXKUkn/JR8XyItzE+dnQzvFUuQj08pJq9oMgdrDbW+vWv7AxHeGTccdlcKeqpr1TnBr9vZ sGrunuL9gCAZjOdkwv0I957JtjZiftGLk1mbo3A4o+ObQe/sEwOMJfSsHTzurq88+mgNsDnq5 HoIAweThZgJ/Vs7AFm9bx6GzJQ2l+b/PmLJ1O0X0S15Q1hX7afMFTPKTDbbvGGy90PhOZWcHD GGG4VZbuKffLhKA+eAVTd8Khve5gtYrY/KZxkNa+nHn/Y2r+ehzMcszvHA1BYUz5IU2kOZle4 IWmOQuMP+fecSlz0VwEubj+2qnKiQNQWu53PVV68lunKLNpplvqVFNQfCoG+a+w+f2XX9IYeN QQOgFTHgVpSdSGoLOmeP1SNiPl/Zgq1VTazBm68rKcFpE/EjyYc2+UocT/vBDC0rL+RnSalUQ kR45BTyWAuGeDyCOA3do/HGfn6iSL0LQlHdEpYSjzZu+SSmLU40EXP/jq2QskrYBEiAvz4Z5b CoBiw+Z01LOE/3du5pWXEbEnCr4Hw56LNdFKytNyT34soHUpzGS67BwCtjNf7qFm/dYSrWxtV lemJVRmoE9oITbim7qyIVGyLINScGBL8lt3bdkMGwDhHyl/CiraMZxEDP4egB5Iv4XhRnixFT 1ywh/rCQgZ4g9WQLgPAqTlECBZ5WHO0MNGjUEfjcQoixl3gQ4kW5o4/iaUcqYch4e3GPdbU/o BaGMaDhlCl87UYrvnx9GrmritWVwTdI4Awa2lMh6HxIeGQNkQtVtX67UY+mYDoIs0Sf3KxVUw 4b2+Q1dGRzy48eKZS4YjXKe38o7JRPyR7ENDJIBG+mG2GPjxOxlhMleHWcVSpaBM8Ieufp19L HSEDf8cSQjzWhSdvas5kra+E9lrc/y51oKAfniM/m9rMJFzb33kY9SvX0tmgjz5uA5NwuI6nS b5EU/XY4THIBdMQozCRnRTMpmV9pdzKHIC0c5/CLIi4qE+KyATc8H/w/QMDGK2a2TKZTQnU+u PncorBpv91m7qFs+eow109uOd+If6HeZ7mu4nHJqZf0jevERbYDuHeov0hhWt2+jTwePibcaa HKzbHLpP4fh+2ISYBlMCR0Dzc7Dc2LRD5HDd3fwI3c/Z4Q0okuy0o/z4j+DZDsBGzL0ixlS46 xsj4GF2JvkFAf4Ym7a4fkByqcOVJDqdi+zHGCVEvF1hwo8Vnnsz43EJoHuCop+v84LaFBjnZD cj9wBMNtC/p8NFDlm2QAvpyRkNojS7nI Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hello, I am reporting a kernel bug found with syzkaller fuzzer. KERNEL VERSION -------------- 7.1.0-rc2-00099-gadc1e5c6203c arch: x86_64 preemption: PREEMPT(lazy) REPRODUCER (syzkaller program) ------------------------------ # {Threaded:false Repeat:false Procs:1 Sandbox: SandboxArg:0 Sysctl:true HandleSegv:true} syz_clone(0x200080, &(0x7f00000003c0)="9562597ade4c359303b4585229dfcf8a12e5a172b6bfeb0d6d973e21df1c19605d9eb45142bd770cb6310057f646adcbde17681e392e8c11af0836a4ffff47c8c083fd4da4af3fdaa71e8a42df556d90bfb7e2511aac2628e271cddf224733c2881a422684cd3c7033fd24e00b205efdd94ece24e22040e80a310fb8cfaafecb00e067c5c2dfc13181c8773d3a37aa7635b8da5dbf2c9b25a7192f3861c442929542a4a564920eb870a06b383e781fe0d54d05275c7e2cd2f901c72c8270308a5db0adbed89176bac1122b21cb2e2d202569ae8d5a97cbce75aff3444207cb68bfcf", 0xe2, 0x0, 0x0, 0x0) KERNEL CONFIG (relevant options) --------------------------------- CONFIG_KALLSYMS=y CONFIG_KALLSYMS_ALL=y CONFIG_KASAN_SHADOW_OFFSET=0xdffffc0000000000 CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF4=y CONFIG_DEBUG_BUGVERBOSE=y CRASH REPORT ------------ ------------[ cut here ]------------ WARNING: kernel/signal.c:2174 at do_notify_parent+0xfef/0x11c0 kernel/signal.c:2174 CPU: 1 UID: 0 PID: 1245 Comm: syz.3.17 Not tainted 7.1.0-rc2-00099-gadc1e5c6203c #1 PREEMPT(lazy) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996) RIP: 0010:do_notify_parent+0xfef/0x11c0 kernel/signal.c:2174 Code: 06 00 00 e8 23 b8 ff ff e9 81 f8 ff ff 41 bf 01 00 00 00 e9 76 f8 ff ff 4c 8d bb d0 08 00 00 e9 e7 f1 ff ff e8 82 88 39 00 90 <0f> 0b 90 45 31 ff e9 95 f8 ff ff e8 71 88 39 00 90 0f 0b 90 e9 d8 RSP: 0018:ffff8880057ffd38 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffff88800c158000 RCX: ffffffff8287ce7e RDX: ffff88800c158000 RSI: 0000000000000040 RDI: 0000000000000007 RBP: ffff88800c015e50 R08: 0000000000000001 R09: ffffed1000afffb7 R10: 0000000000000080 R11: ffff88800c158000 R12: 1ffff11000afffaa R13: dffffc0000000000 R14: 0000000000000080 R15: 0000000000000001 FS: 000055556c108500(0000) GS:ffff8881121b5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff9749c2480 CR3: 00000000afea6000 CR4: 00000000000006f0 Call Trace: exit_notify kernel/exit.c:757 [inline] do_exit+0x1a84/0x2960 kernel/exit.c:987 __do_sys_exit kernel/exit.c:1084 [inline] __se_sys_exit kernel/exit.c:1082 [inline] __x64_sys_exit+0x42/0x50 kernel/exit.c:1082 x64_sys_call+0x1880/0x1880 arch/x86/include/generated/asm/syscalls_64.h:61 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x6a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f REPRODUCTION NOTES ------------------ The bug was reproduced consistently. Syzkaller minimized the reproducer to a single syz_clone() call. The WARNING fires in do_notify_parent() during process exit when notifying the parent, called from exit_notify() via do_exit() -> sys_exit(). Reproducing took 38 minutes across 87 programs. The crash is confirmed not corrupted and reproducible. This bug was found with syzkaller. The full .config is available on request. Thanks, y2k y2k@desarrollaria.com