From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (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 121A9175A68 for ; Sun, 1 Mar 2026 11:15:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772363723; cv=none; b=cD08HZdkY79WrWfylht/ACwad6LkoOfQBVX/4FD5g+dE2J3zTzIs7BnpzkoctrNDi9azzrgrLBIa6lk2LSWv5CKIv0Af+o0Z+BhRi/l26rVnFks039H4T9k9jG2Dvqia9ntKlj0nfIJn7beJRw94Qxqbl6NfSnt+AXYhDVlU+Wg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772363723; c=relaxed/simple; bh=6nqydCXm309rCoYFPEhyghNtvLDFuVFmAPLQ2/fwK+M=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QZC/LGUERQrp5xtwq/kMxun1VZKwTNV4BY4huXY0Xl6ITqrayx9PzZa/eBHnyaklbhoUCIYDe79YdO0p3H3A2fikYtwWjNGcXz7we6nt7p4DBt/U3pYVpLarudWRCgt4C77Ak82DQ0YksAprkoV5u6AA9goE4N8GQjbQovTsX28= 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=209.85.161.70 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-f70.google.com with SMTP id 006d021491bc7-679c978c609so29056669eaf.0 for ; Sun, 01 Mar 2026 03:15:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772363721; x=1772968521; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=uTWr7yHz10Q63auFPet4ICgnJKDd44UMepwelZQbJc0=; b=nDECatzqhK9K6Cg0gVxhl6T5YPtkWI7SNHKLY3cgmj6ZDL3qDgbliS1oqwCkpWIeUs 01H3UWAaLZ0bc4dCdcbHR9J1O53N7dLmuwuSAqOOrzYCjGzqj4aQbF8rxMUzlxiOZlI2 N1Q4r/hQT1l9WoXtFyySSBlUEcHOl+yOuS4mh0qEgmKhaI3EKSUgIZBo9NoFAct1yvWa AeUoPRwBIl+INS8valXfVGMnjPRsS83wZMKIqSa74m1Ar4MsU4UfzKNjpWN/ULOyoalR qjQyayAGqiAfUBv7PwAFcaWQtnVuS1wDztUr3nltZXRVWsimzOjOtJ/6+AlRB5coTfEn VY2Q== X-Forwarded-Encrypted: i=1; AJvYcCUUPC5NaP7ItW80XpYDpH9y99vkE3kzj9atxc2pO3ffjTXbj71D+jqyEEv0R86ysjcbOoXotqjMxA==@vger.kernel.org X-Gm-Message-State: AOJu0YzH/VXWq+6pMLJ1EsO5STg/Am/vLgBJ8yPMl0RGvho2y1UTS2Hf bcCLdvGPq63ukIEcWSpH/bzMDdmLWtGUxS0NMug/09L1L8jbJrSP5wJVtiAxRHv52Gh3WKsbwCe QlC99RIfck93dQslF10DfONkXYHx+uIa6yisWyCBesVCbqlQE2bfq1TaPz68= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:81d2:b0:676:f174:9d07 with SMTP id 006d021491bc7-679fae11a3bmr5321030eaf.19.1772363721178; Sun, 01 Mar 2026 03:15:21 -0800 (PST) Date: Sun, 01 Mar 2026 03:15:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a41fc9.050a0220.3a55be.005a.GAE@google.com> Subject: [syzbot] [io-uring?] WARNING in io_wq_put_and_exit 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: a75cb869a8cc Merge tag 'v7.0-rc1-ksmbd-server-fixes' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13c91952580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b3e7eea64c28d20 dashboard link: https://syzkaller.appspot.com/bug?extid=79a4cc863a8db58cd92b 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/2c2deb730c26/disk-a75cb869.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2c7db53271fb/vmlinux-a75cb869.xz kernel image: https://storage.googleapis.com/syzbot-assets/db43e1ef6c13/bzImage-a75cb869.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+79a4cc863a8db58cd92b@syzkaller.appspotmail.com ------------[ cut here ]------------ time_after(jiffies, warn_timeout) WARNING: io_uring/io-wq.c:1369 at io_wq_exit_workers io_uring/io-wq.c:1369 [inline], CPU#1: syz.0.2310/14573 WARNING: io_uring/io-wq.c:1369 at io_wq_put_and_exit+0x36c/0x9d0 io_uring/io-wq.c:1398, CPU#1: syz.0.2310/14573 Modules linked in: CPU: 1 UID: 0 PID: 14573 Comm: syz.0.2310 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:io_wq_exit_workers io_uring/io-wq.c:1369 [inline] RIP: 0010:io_wq_put_and_exit+0x36c/0x9d0 io_uring/io-wq.c:1398 Code: 00 00 0f 85 7d 05 00 00 48 8b 15 1f c2 50 09 4d 89 e7 31 ff 49 29 d7 4c 89 fe e8 2f 49 18 fd 4d 85 ff 79 aa e8 45 4e 18 fd 90 <0f> 0b 90 eb 9f e8 3a 4e 18 fd 4c 8d 63 08 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc90000a678d0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888023693000 RCX: ffffffff84f05071 RDX: ffff88807bec2480 RSI: ffffffff84f0507b RDI: ffff88807bec2480 RBP: fffffbfff1c82250 R08: 0000000000000007 R09: 0000000000000000 R10: ffffffffffffe8f4 R11: 0000000000000000 R12: 0000000100012cf4 R13: 0000000000001b58 R14: ffff888023693018 R15: ffffffffffffe8f4 FS: 00007f83887c66c0(0000) GS:ffff888124447000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000a63000 CR3: 00000000acc14000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: io_uring_clean_tctx+0x114/0x180 io_uring/tctx.c:222 io_uring_cancel_generic+0x7b9/0x810 io_uring/cancel.c:650 io_uring_files_cancel include/linux/io_uring.h:20 [inline] do_exit+0x2be/0x2aa0 kernel/exit.c:911 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f838799c799 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:00007f83887c60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f8387c15fa8 RCX: 00007f838799c799 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8387c15fa8 RBP: 00007f8387c15fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8387c16038 R14: 00007ffd9bf3d2d0 R15: 00007ffd9bf3d3b8 --- 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