From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f72.google.com (mail-oo1-f72.google.com [209.85.161.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C427155A5D for ; Sat, 28 Feb 2026 16:11:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772295084; cv=none; b=iogHddl0ctzNo0ksKGJ89ZS4ktzQPSuneN0AXM+vxVhMZ4dpF8tflBlbo74wG3V++AvR+UuBHKM7cTEm/D4jW1euJ7XQQaYkEVbBjotioo8Vf3FumUklCu513sFYl/tBlf4zP/TzBDVJLW7qd+QDEs4ddELXtP5852Uh11vE0JU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772295084; c=relaxed/simple; bh=m49h9MrzJOl2917rG6PqYBwNDwtONnhuOtQvGOqpWs8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DG9MEhfQIa/N511q32LMoZ+AtmF6pmPpBn5pKszvJ9hL9i8PB/qPB+OiUNi/ymIiYp/0ZN9vDzEFIiwnaxX9j6ZU8OD2NLNJfAYfCOpqAgyFde60ah4lhgf9lKBYdD3dJXvO0rLdzG2I7Mh+Sfxe6JDeHIzUdUmP5LjDwWzv0R8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f72.google.com with SMTP id 006d021491bc7-679dcf1f680so83443096eaf.0 for ; Sat, 28 Feb 2026 08:11:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772295082; x=1772899882; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=DcrlbH/NcF1MbfC6/vP7YKUtaLGYeOdb7595SsnxszA=; b=dWnDMDzeiTPvBpui3e3kUIZHFDt6sPmb/ce6rSojos1HmDxpFhZAGcbzw8TNKHHuD+ SwDbpwFnSuzyBonpqaJCWI5eHavW906u7pm5Gvt8MbOVKzLMGFyxQ+Z6HgXvwhEgpgq/ dg/+mCjf7ckpA9oxIIZ/k2sE+EjI4FDJdMscEjXUOxeF94QiW1H3di+1KIiZaHbQ032p f6xNEEvF/0IYwZhtg1Qc5aBcx2yzwzCAB4mHAh2+vtht5hvItFnVbLjmhCz3HQV223hr q0o9FljUCFHD37kNmjhI2kRJ+6QwC9LZPpVwqLWz3Yjv6z2agJ8LSBZeXQjjbgAIMNrF IvSg== X-Gm-Message-State: AOJu0YzxBiga7+szbucgl2ZKF3hu6o7dFapUMUPZV6wsXk0GbeQOF+3k D8QpycYUauJmOgabn2qCEJ1FqGlPcdUBslSz6fxG5DzdBbANKx/YgZYNXCuLwgO12vky8Z8c0tL rm0Uy9z86aWFhMi4H6HOnzZ0GFHpxN9I2kbWYiVel1RDhtR1jYQilPy3l+kc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2908:b0:679:dcb5:b843 with SMTP id 006d021491bc7-679faf4d742mr4316692eaf.55.1772295082426; Sat, 28 Feb 2026 08:11:22 -0800 (PST) Date: Sat, 28 Feb 2026 08:11:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a313aa.050a0220.3a55be.0042.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in do_notify_parent From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3fa5e5702a82 Add linux-next specific files for 20260227 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16ca68d6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4791940d55a6241f dashboard link: https://syzkaller.appspot.com/bug?extid=bbe6b99feefc3a0842de compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/68faadb8e3e6/disk-3fa5e570.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4244d0610a6a/vmlinux-3fa5e570.xz kernel image: https://storage.googleapis.com/syzbot-assets/f95b76890c87/bzImage-3fa5e570.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bbe6b99feefc3a0842de@syzkaller.appspotmail.com ------------[ cut here ]------------ !valid_signal(sig) WARNING: kernel/signal.c:2174 at do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174, CPU#1: syz.1.1187/9757 Modules linked in: CPU: 1 UID: 0 PID: 9757 Comm: syz.1.1187 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174 Code: c6 05 c4 e5 92 0e 01 48 c7 c7 c0 46 cb 8b be a3 08 00 00 48 c7 c2 40 48 cb 8b e8 ed 52 17 00 e9 c6 fa ff ff e8 23 1f 3b 00 90 <0f> 0b 90 45 31 e4 e9 1c ff ff ff e8 12 1f 3b 00 90 0f 0b 90 e9 75 RSP: 0018:ffffc90003f17c40 EFLAGS: 00010093 RAX: ffffffff818ad72d RBX: dffffc0000000000 RCX: ffff888035061e80 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000040 RBP: ffffc90003f17d90 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff520007e2fa4 R12: ffff88802eba8010 R13: ffff888035061e80 R14: 0000000000000080 R15: 1ffff920007e2f90 FS: 0000000000000000(0000) GS:ffff888125102000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faf66e52770 CR3: 000000002cc0a000 CR4: 00000000003526f0 DR0: 0000000000000007 DR1: 0000000000010005 DR2: 000000000000000f DR3: 0000000000007fff DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: exit_notify kernel/exit.c:756 [inline] do_exit+0x13f1/0x23c0 kernel/exit.c:986 __do_sys_exit kernel/exit.c:1083 [inline] __se_sys_exit kernel/exit.c:1081 [inline] __x64_sys_exit+0x40/0x40 kernel/exit.c:1081 x64_sys_call+0x2231/0x2240 arch/x86/include/generated/asm/syscalls_64.h:61 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faf66f9c799 Code: Unable to access opcode bytes at 0x7faf66f9c76f. RSP: 002b:0000200000002818 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007faf66f9c799 RDX: 00007faf66f9c799 RSI: 0000200000002840 RDI: 000000000000000b RBP: 00007faf67032bd9 R08: 0000200000002e80 R09: e32a5aa294094ac1 R10: 0000200000002e80 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faf67216038 R14: 00007faf67215fa0 R15: 00007ffe4e1e4898 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup