From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (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 7F9F1277035 for ; Mon, 2 Mar 2026 18:23:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772475820; cv=none; b=HldotYdcc5BBsJSdjmt7PpTkfDlhh2fvIkPl7adLIzTYxSdqxz0quB5TtSloAvEi4Obs+w6Nl4P1AekB2Xnk+2SxP7ei+oY9OxMjx22wiPMmiCiFQ1tJYydSCXk9tR8/XawI5dsBG91aL/vr6bw+SnwkHwVsVej0uIeA57adPyc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772475820; c=relaxed/simple; bh=qNOHa+rseCqGs5LxojgdMAFoUhm7OmsgGSojofaLm88=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DzrCN/ZAU3IDUWNelEGb4L8oTWDCsfV50k0PvG4mK/QmH/C3cLiFqOVgylAvHNt5kjsLzYNR7R/uhchrs3q8wiOJHamttDHpHQwxIXU8s1hzIyKGxZSaRGB7ySrm/oc3D2y9RycL0RFm6JdbiI+aItVRyTDFNVRKprcAUhw05Jg= 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=209.85.167.198 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-f198.google.com with SMTP id 5614622812f47-4639e1fedcbso55885240b6e.3 for ; Mon, 02 Mar 2026 10:23:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772475818; x=1773080618; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=F9MOS5yaXkpEoXMq9Rc8Av4xW8/kMflXAX4xn4Dt8As=; b=hVLbl6Bfci+cTN/MCxTGKCkqV9+4GtbTNTs1M6oMrC7xg5gKcGz2bR7h5ddAO/69RF ROpI7k/JTt223FmuIasDUU/8jBE9Ile6BEyKmQxFPykiykDgwSgGlzEjowsdK0vpeA6e Q7U4rZCtwpJ63ig72LJhrqCLGSk6O/0Yw6ZHV3V2n+o3xrdW+ij0ju8qZx3rqB9aS/J9 JLS20JbfjVc719arkMnkRdrEfcdXPcN2uQeOAisMSi55yeL2rH8cWztQiIf2Bq02CXXz b33t+Ti8X6hDNcMLFp0K9cnlkhHNI+55FKW9qUAbiws5xEtO+2/8FKCp6/Gf+qfB6dzR S8ow== X-Gm-Message-State: AOJu0YwrTcYraoFyx8dP9JU/5C4vjL58VuqUJSf+tvIRzT9BfPkRpwpZ 6SQIx/wiCBhChStSYFK7ZL6q6l/z6a/a7AvWBP3w/MOYrlAnovw4RBVjSnqU85ZgvEH2cMWIzN3 UwpmYW/Bbccdc87qiIuN3cLt55sMrgnwaCE4AIDwCrFjEGKJH28iVd6odXhQ= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:189b:b0:679:e930:b555 with SMTP id 006d021491bc7-679faefbf93mr8098907eaf.48.1772475818470; Mon, 02 Mar 2026 10:23:38 -0800 (PST) Date: Mon, 02 Mar 2026 10:23:38 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a5d5aa.a70a0220.b118c.0000.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in __run_timer_base (2) From: syzbot To: linux-kernel@vger.kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f4d0ec0aa20d Merge tag 'erofs-for-7.0-rc2-fixes' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13674d5a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=70fe0401f305d8d4 dashboard link: https://syzkaller.appspot.com/bug?extid=b65655bc21a8355d65c8 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/85c0270b9693/disk-f4d0ec0a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/01f6d53163fe/vmlinux-f4d0ec0a.xz kernel image: https://storage.googleapis.com/syzbot-assets/d351d713d10e/bzImage-f4d0ec0a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b65655bc21a8355d65c8@syzkaller.appspotmail.com ------------[ cut here ]------------ !fn WARNING: kernel/time/timer.c:1786 at expire_timers kernel/time/timer.c:1786 [inline], CPU#0: ktimers/0/16 WARNING: kernel/time/timer.c:1786 at __run_timers kernel/time/timer.c:2373 [inline], CPU#0: ktimers/0/16 WARNING: kernel/time/timer.c:1786 at __run_timer_base+0x7d2/0x9f0 kernel/time/timer.c:2385, CPU#0: ktimers/0/16 Modules linked in: CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:expire_timers kernel/time/timer.c:1786 [inline] RIP: 0010:__run_timers kernel/time/timer.c:2373 [inline] RIP: 0010:__run_timer_base+0x7d2/0x9f0 kernel/time/timer.c:2385 Code: 27 4d 85 e4 74 7d e8 4d ee 13 00 e9 48 fe ff ff e8 43 ee 13 00 48 8b 5c 24 30 43 80 7c 35 00 00 75 d4 eb da e8 2f ee 13 00 90 <0f> 0b 90 48 8b 44 24 48 42 80 3c 30 00 48 8b 5c 24 30 74 a9 48 89 RSP: 0018:ffffc90000157b40 EFLAGS: 00010046 RAX: ffffffff81b064e1 RBX: 0000000000000000 RCX: ffff88801caa8000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffffc90000157cb8 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffffbfff1ed4517 R12: ffff88803c019f38 R13: 1ffff9200002af81 R14: dffffc0000000000 R15: ffffc90000157c08 FS: 0000000000000000(0000) GS:ffff888126343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f718355de06 CR3: 0000000059208000 CR4: 00000000003526f0 Call Trace: run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x1de/0x6f0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] run_ktimerd+0x69/0x100 kernel/softirq.c:1138 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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