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 CD2F5351C04 for ; Tue, 22 Sep 2026 00:32:22 +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=1790037144; cv=none; b=QiTluh0bHmTVnrGojCp9zxDY9ExAhzV1v0XvZuird4LD9KHgqwuXhonDIWYgJ6BVUAy8+B/k2wXcDMXIihZu7LzdAyuIOlbI1ld7eF0QUY90AF2aUVbLQUVc31/1ang8O8zT1x/alF3otkUtqo4Cbg+RahBvx9iX5ciz/xD0Ggs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790037144; c=relaxed/simple; bh=PGA37Aw1uYtTeEO5MjT+1glEXpmvF6LSRdWoyPJdf18=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=rvGE8UOnmkC7k7iH8bVVXcjFnOeZkM48m2z8d8Yxg2KfMCIOjrq0OBr95qzc127wUUjqL3B/oEcJMCsB/s7hqqFDGo+bOdBrtkguUedDj4KlBiP6+RREqaBCA5ZKV/PoNfuT/1D/sozG+TNiNg6cxh+VQt1sW4ObI2Jv3BRPX88= 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 006d021491bc7-6b0e7370be1so587372eaf.0 for ; Mon, 21 Sep 2026 17:32:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790037142; x=1790641942; 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=eRdut7bVBSm2SpCHoYzNXZW5bUxoFVvpj0afbTE+wWU=; b=YFnYe5xApb2gvL2YzAHVcb9A/389vL1AA8R+hPLszF470v85KGAEFzsIQff6lcomL4 Y8JVetinDdl9h+qChQq9MqftCFEH4YdG5o2qPOGA3agKxz7D2J53H5Ut+QDH0rITMUfX sj8aLZotVFhhrhFFBLXIUlABd8gBhOfxXhkDnjoOiF3PeMnOuPvYvaJ5OggK84WDSeKz Hdga7h2c5pI+QruNRtZ4rCL5MJzu/xun1Rpdz1XWQrcnUVBO2q/bI7G12AU5k7ldH0bW M9McpDG2ZwN5UIj7fOnlBa+uYM3MRJlAFZDBIz/90+dh2r2NVzg2yACJydMIVDf5icxD 7dFA== X-Forwarded-Encrypted: i=1; AKwUvBx1iGeOl8UypjEneoXCZJj8g+foO2Cl8mTb2wK+YDQmLgLYofm80WwnfuWamEpm+LyHSuzocloB8bpVLI0=@vger.kernel.org X-Gm-Message-State: AFuF++ll2DirI266Q5CcZaP+NgVOuY6ppnjVeoJZsi9rQTV3Ggtm7FQN 5oRp6wroz/J/IrpQnMBkrXijpaLZl3TCOnvcpW+aJIYQ14neCs5Twcjev5gjq7OofeBVtr7swL5 qgXXWaxNp3rO4SC0v+qjG8l4RLOJncusiiJf1mrVD8zO6Kw9FcOZ5ef3J2eY= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:16a4:b0:6ba:5f65:6e5c with SMTP id 006d021491bc7-6d15b86e2fdmr1299293eaf.42.1790037141831; Mon, 21 Sep 2026 17:32:21 -0700 (PDT) Date: Mon, 21 Sep 2026 17:32:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab1cc95.3179f8cd.1e36b2.0025.GAE@google.com> Subject: [syzbot] [net?] [nfc?] WARNING in nci_unregister_device (2) From: syzbot To: davem@davemloft.net, david@ixit.cz, edumazet@google.com, horms@kernel.org, krzk@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, oe-linux-nfc@lists.linux.dev, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4982d3552a3b Merge tag 'sound-7.3-rc4' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=126007f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=84649d3ff8d550cb dashboard link: https://syzkaller.appspot.com/bug?extid=c2d417f06523d8133c6a 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 (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-4982d355.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d2afaea1fac3/vmlinux-4982d355.xz kernel image: https://storage.googleapis.com/syzbot-assets/06e82fadea82/bzImage-4982d355.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c2d417f06523d8133c6a@syzkaller.appspotmail.com ------------[ cut here ]------------ pwq_busy(pwq) WARNING: kernel/workqueue.c:6173 at destroy_workqueue+0x329/0xa30 kernel/workqueue.c:6173, CPU#1: syz.2.490/7238 Modules linked in: CPU: 1 UID: 0 PID: 7238 Comm: syz.2.490 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:destroy_workqueue+0x329/0xa30 kernel/workqueue.c:6173 Code: 8d 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 80 06 00 00 49 8b 44 24 68 48 39 c3 0f 84 84 00 00 00 e8 a8 67 3a 00 90 <0f> 0b 90 48 c7 c6 e0 33 ee 8b 49 8d 96 70 01 00 00 48 c7 c7 80 23 RSP: 0018:ffffc90024d17d18 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffff8880202d5024 RCX: 0000000000000001 RDX: ffff88802efb0000 RSI: ffffffff81d1b808 RDI: ffff88802efb0000 RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880202d5000 R13: dffffc0000000000 R14: ffff88802d717000 R15: 0000000000000001 FS: 000055557a4f1500(0000) GS:ffff8880d5c59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb058227dac CR3: 00000000259c2000 CR4: 0000000000352ef0 Call Trace: nci_unregister_device+0x87/0x330 net/nfc/nci/core.c:1332 virtual_ncidev_close+0x4b/0xa0 drivers/nfc/virtual_ncidev.c:168 __fput+0x3ff/0xb50 fs/file_table.c:512 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:70 [inline] exit_to_user_mode_loop+0x1d8/0x700 kernel/entry/common.c:101 __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:343 [inline] do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb057f9e159 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:00007ffca775e428 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb058227da0 RCX: 00007fb057f9e159 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb058227da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00000000003ff438 R11: 0000000000000246 R12: 0000000000011884 R13: 00007fb05822609c R14: 00000000000115bd R15: 00007fb058226090 --- 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