From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 31D8E3FCC for ; Sun, 9 Aug 2026 00:09:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786234175; cv=none; b=hhWDA+VL4gfILiULEwZuwdIQqrlj8J1vpJny8eLhgjgSQuKrPNm3DZbWruXfpsaAc9gva+M2ZZGiXBdC6LVIyheGeJj2gSgr+QK/05kOmkadJomOuaG+WWw25zRwaoqZlgQEbycT+zUBRe71dLX7KdUgib8R9vSmJeb5lUp1lHs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786234175; c=relaxed/simple; bh=/QeTaHNPwcCPmeumVZo79wex1aEfJNEMDkSe176uCyw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=khpUsEibH++bTGtTeqckWSGYMfBtaGH126oXLoppZSuvvmrzW6TeFee1Rcm4BrfgER9iMbKlg9VGOoAr4HjYaXOk9gwhmzN7LHT0DkaSyTM1IKJ2qIbtdPCpATrC3HEm0LfNWeZtkoG8hhhxETx1j2Nuf68wsmHH7PECtoxXrE0= 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=209.85.167.208 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-oi1-f208.google.com with SMTP id 5614622812f47-4a45b3f0bdfso997468b6e.1 for ; Sat, 08 Aug 2026 17:09:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786234173; x=1786838973; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=vInf9AVLd8ueP6fJlwsQOnMJLRVgfMo2meap1oZ1iJw=; b=g/JzjqpUgSoP2tlJVf3zz9IVgr3BhqS894liMLON3IrD+EXaJW1qE8BZxjfqrUZ8It uwS+DipFsmiNgIHdyrxbH1xu/PMYriBetmqFqLFlXscptSRXLIF/tCNEj3D4ex//xI1C WkqAJABuXf4OoaKrCNHG7CvOmd9zsJxPZZ8BUqd4FprtRL4YbX0zAtb1O2cb4HXh06c/ BVb5xg/+g0i8BSFrAa40tDK/igx2nax9cf+4XGUrTvACkn1yviiOOrYUIulkBEscyOHf xG6zVi1ky67P03ptcOmDzYaQUK7Hsssur8S0egYcoK1zYm65hO1B0PPw6k55LZusrHxQ YctA== X-Forwarded-Encrypted: i=1; AHgh+RrEtjy4Ho4j0DdIVydLnM5kWvHb2k01lCamcaS/YzCUguLkO+XvQ+JPT+NA9s8CelAUfhBtujLoNA==@vger.kernel.org X-Gm-Message-State: AOJu0Yw5RgqSlnEEhvl0qM8VRcE95GXAuQeCyr3eqRR2hs+CIK7MuUOW ubKRcHqBGeydz6nQ4+kTJArMngpcuh/E+PLioUtyqIMIVW888MwI+ktuxsHW/96srptY1oKb5Jn d4dA+McIoB4ya5ydrF8NhRMFOTqSH64gXzly6EtVz05aj2TmBnfmC20dGDO8= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1785:b0:496:11f1:f2b3 with SMTP id 5614622812f47-4b1a107dfc1mr9184879b6e.20.1786234173169; Sat, 08 Aug 2026 17:09:33 -0700 (PDT) Date: Sat, 08 Aug 2026 17:09:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a77c53d.01d0871a.3a0d52.0077.GAE@google.com> Subject: [syzbot] [nfc?] kernel panic: kernel: panic_on_warn set ... (3) From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, krzk@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f9a2394a2348 Merge tag 'mm-hotfixes-stable-2026-08-06-18-4.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a1be49580000 kernel config: https://syzkaller.appspot.com/x/.config?x=30772517ee66ef58 dashboard link: https://syzkaller.appspot.com/bug?extid=fe5ea83cdd7fc263f452 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ebec1b22682a/disk-f9a2394a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5c88db273365/vmlinux-f9a2394a.xz kernel image: https://storage.googleapis.com/syzbot-assets/43600cc1b90a/bzImage-f9a2394a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fe5ea83cdd7fc263f452@syzkaller.appspotmail.com Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 0 PID: 7451 Comm: kworker/u8:11 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: iou_exit io_ring_exit_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x552/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 check_panic_on_warn kernel/panic.c:525 [inline] check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:520 __warn.cold+0x191/0x318 kernel/panic.c:1104 __report_bug+0x30f/0x440 lib/bug.c:254 report_bug+0xb2/0x220 lib/bug.c:286 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:io_ring_exit_work+0x479/0xd7a io_uring/io_uring.c:2365 Code: 8e e8 ab 8c 44 01 48 8b 05 24 97 4b 0d 4c 8b 7c 24 38 31 ff 49 29 c7 4c 89 fe e8 f2 f2 d4 00 4d 85 ff 79 12 e8 48 f8 d4 00 90 <0f> 0b 90 48 c7 44 24 20 70 17 00 00 e8 36 f8 d4 00 48 8b 74 24 20 RSP: 0018:ffffc900047b7aa0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888052290710 RCX: ffffffff81355b6e RDX: ffff888052140000 RSI: ffffffff81355b78 RDI: ffff888052140000 RBP: ffffc900047b7c38 R08: 0000000000000007 R09: 0000000000000000 R10: fffffffffffffffc R11: 0000000000000000 R12: ffff888052290000 R13: dffffc0000000000 R14: 0000000052290700 R15: fffffffffffffffc process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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