From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (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 448E51A08AF for ; Wed, 27 May 2026 06:52:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779864747; cv=none; b=Svc9UlT2fG92Z6GcDuuevh7d7UyFseMCBy1DW+M+eLI3vZZfresHSYJ8CQr3fDMG3YI8DQYVcrQT/4XL1+gI+joKtFZePKr/GFTuktfjM16zw0Mu86U0OQfCnzpuytQnaYxYzo3cPdafC7g4ApwRl5wbFQMQmiKukbiI2h56bPA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779864747; c=relaxed/simple; bh=NuLaWxGjOC5dN8u0YVORzKrs+9B8bupzzokaxFZjFdE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=mmCpvfmKsPeDe0SInn0f5B9hLwR60FS6AZmxaunU2iFd3N55Rfu3CTI7shCwUIZXGsd2xNYtHkmASTBQNWF8UzFcmZh/mXE2rz9apj555/KPPPRWWMaXrXI7C2efzwdn0IElKgYaeKLBO0RWaRhNB6k9+1fgHlPPpVzOyTPtV/o= 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=209.85.161.80 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-f80.google.com with SMTP id 006d021491bc7-69de23f28d5so735014eaf.2 for ; Tue, 26 May 2026 23:52:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779864745; x=1780469545; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=fva24a47+k5joHjeL7H6qpg8fGP2lloRAuq58Skum0g=; b=rgElecujEfkxq6SxkAekJ3N3gfpyRL014Z+D+trNEl3N/mj/XiKQLtPExE1EE1/sh+ u26ng+b1L+vZ4DjffAzFVD4yKyOUSA1KlGg4Qk1aPzELQwlonpVuvqOAZnIEKnPxs2hV 5YTZs5arXSy2OI4KZH130mtPnPc9/SdbPj4WO0+at70YxEIxOylvchge8IJG3eY01eu7 SrerMEGC8RyRTpJm/DtnCa1FkzCylwjQ6TZ4iSLaOEmIuzC8eiR7OuRmaWCmofrSo4Or 7DTAibpXV2E/stAEzdu9kH6e7mWgy8v/saqQOROU0mtQHzm3ou2J1Y/CIkZJIQPRKpiq RbiQ== X-Forwarded-Encrypted: i=1; AFNElJ8qGtAjf1wXE3wcF9vP7X6YsktXCT8RNGRsM4mE1ZsYbspiP3dyMvG8LLqdOJvUOkCnF8YxLAAvqQSsXI0=@vger.kernel.org X-Gm-Message-State: AOJu0YxJCFwKpxGCTwh4yWWBJ1aE8BpGz4g/67FNTifMCmQFdBM9UVgx Tm32RlnzoXd1Qc6YLaY61RqPMW4GMzHdQMgkvdEP3PumGWR5DnVUT8fQ3HfS/wreWfgmXz3g4hh +3RSU3TwhjFAkYO0LApMP1WhoGCy9D4cMDn4sdaev1b3bQvY5qA8LmIHysgE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4ccb:b0:69d:ecb9:4a6 with SMTP id 006d021491bc7-69decb90861mr113467eaf.47.1779864745284; Tue, 26 May 2026 23:52:25 -0700 (PDT) Date: Tue, 26 May 2026 23:52:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a1694a9.17ccd394.1fa6b8.0001.GAE@google.com> Subject: [syzbot] [io-uring?] WARNING in io_wq_put_and_exit (2) From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, 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: 6a97c4d5262d Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17a41ea6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e327ee9a867dd6b9 dashboard link: https://syzkaller.appspot.com/bug?extid=b0d54b9e81de55179e47 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/5cc8b6debcbd/disk-6a97c4d5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/649698f0231f/vmlinux-6a97c4d5.xz kernel image: https://storage.googleapis.com/syzbot-assets/b297958f355b/bzImage-6a97c4d5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b0d54b9e81de55179e47@syzkaller.appspotmail.com ------------[ cut here ]------------ time_after(jiffies, warn_timeout) WARNING: io_uring/io-wq.c:1370 at io_wq_exit_workers io_uring/io-wq.c:1370 [inline], CPU#1: syz.1.3756/22484 WARNING: io_uring/io-wq.c:1370 at io_wq_put_and_exit+0x36c/0x9d0 io_uring/io-wq.c:1399, CPU#1: syz.1.3756/22484 Modules linked in: CPU: 1 UID: 0 PID: 22484 Comm: syz.1.3756 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:io_wq_exit_workers io_uring/io-wq.c:1370 [inline] RIP: 0010:io_wq_put_and_exit+0x36c/0x9d0 io_uring/io-wq.c:1399 Code: 00 00 0f 85 7d 05 00 00 48 8b 15 9f 3c 4c 09 4d 89 e7 31 ff 49 29 d7 4c 89 fe e8 cf f6 13 fd 4d 85 ff 79 aa e8 e5 fb 13 fd 90 <0f> 0b 90 eb 9f e8 da fb 13 fd 4c 8d 63 08 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900077af8c0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888033fdb000 RCX: ffffffff84f4b5f1 RDX: ffff888030d4ca00 RSI: ffffffff84f4b5fb RDI: ffff888030d4ca00 RBP: fffffbfff1c81e50 R08: 0000000000000007 R09: 0000000000000000 R10: ffffffffffffe7c3 R11: 0000000000000000 R12: 0000000100027def R13: 0000000000001b58 R14: ffff888033fdb018 R15: ffffffffffffe7c3 FS: 00007ff97ac796c0(0000) GS:ffff88812446a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b79c90b9b CR3: 0000000037235000 CR4: 00000000003526f0 Call Trace: io_uring_clean_tctx+0x114/0x180 io_uring/tctx.c:248 io_uring_cancel_generic+0x7b9/0x810 io_uring/cancel.c:657 io_uring_files_cancel include/linux/io_uring.h:20 [inline] do_exit+0x344/0x2af0 kernel/exit.c:916 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 get_signal+0x20ff/0x2210 kernel/signal.c:3037 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x8b/0x4f0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x706/0x860 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff979d9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff97ac79028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: 0000000000018ff8 RBX: 00007ff97a015fa0 RCX: 00007ff979d9ce59 RDX: 0000000000018ff8 RSI: 0000200000009b80 RDI: 0000000000000003 RBP: 00007ff979e32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff97a016038 R14: 00007ff97a015fa0 R15: 00007ffc1552e588 --- 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