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 7EB253B27EE for ; Tue, 9 Jun 2026 23:04:34 +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=1781046275; cv=none; b=XimMeul5WTuUJ/m5j0GLnINd9keSo/tbUHXKkOZ0SjrZJUsJnHqY5unuhMjkQ4KKXAB3o0dsFSKrB1nM/Q1tyVk2eU1Zrs0Bknz8mJTwtQAvTuCf++olcZHKOfUO/r78toPzHN5hJcpePPhcaWBeKh9qjBrYNI2HlklxAoQs5JY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781046275; c=relaxed/simple; bh=YUqga8davzo7RXFWDkh6tFdj/a3Vd2XQriJ+oRVKN+w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=f8hdKKbExDGP3P8Ks/wji4Dpn2gxKDiSHlH5MskzuBBNUIMkXsRO9hhcIKxZZUXdkrw0CXQ4UfiolBTPydaPqbii1rrPNKF6mNrS/72JqXxA0cqouK5M7N+MjZf2mEhVCACtQuAp8TfGMDY7b0LV19LsnXCJtgpUkkRl27GHEZI= 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 006d021491bc7-69e1eb09b3aso6137832eaf.2 for ; Tue, 09 Jun 2026 16:04:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781046273; x=1781651073; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=xsUWkrQ8rmjNpBE5wMBkO9QXkVTkJMjHrIkMU52dqvA=; b=dbigcZ25rSw8fxtv/hToQPF1Cv/jyf2N1PsXDbwrtW5VX9KnuW77kFcU/zlKzSnwD/ RlUq9zpFL9IGx2FL/v7idXcJqbKX6ZCSIqSfNNZ5RrRE2vZe0taRxpubvvdqzojbu1uR 6hiAvhWYGy7ovW9d7zK695DA/Z9yPSdpTSlO/gBIic3onZwKPjgk+dW3155PJmzSh9n9 pLmonUd3C7NUsa4Pf9v3XRNAPpIhs467pNXUQrD5LZ7srKhmzPOOGqHuVVU5/GEae4V1 xpZSEjWUFXmaZ/f23fOzBdBlz9OtYnZc2rQqjQNE7svFoCJmPURirvconsZOSrzMj+Cb 1l6g== X-Forwarded-Encrypted: i=1; AFNElJ/893o2ya8HrWM9B5YE/4wDVJxHv1xjs74cZPZQqEKA+IwZshVRkLyOjoAW40c+BH9ISlimTd22r20708CesA==@vger.kernel.org X-Gm-Message-State: AOJu0YzxZ//V1TPOEImpeEDhSqtEkH1/1/4kdF+8m9G8bZUa+LRpl2MY YQIbQTxAuZSp6sKQSNqSrbK5TVDzyzjOdog5h/nwpzGJBpo+360uh9YhYtnXRVNwPHBgw1yzHt+ UTsUsH4hmEsJMRh4rmRrWpte1rjdXYWfkWPIo3eV4DM5xCdlFTmSGyHPWQgw= Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:413:b0:67e:251a:bd3e with SMTP id 006d021491bc7-69e68b5f6f6mr10350886eaf.18.1781046273642; Tue, 09 Jun 2026 16:04:33 -0700 (PDT) Date: Tue, 09 Jun 2026 16:04:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a289c01.39669fcc.33b062.00aa.GAE@google.com> Subject: [syzbot] [btrfs?] WARNING in __alloc_workqueue (2) From: syzbot To: clm@fb.com, dsterba@suse.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a87737435cfa Add linux-next specific files for 20260608 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=178a7f2e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=da47745f686dc823 dashboard link: https://syzkaller.appspot.com/bug?extid=f80c62f371ba6a1e7d79 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170260ae580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124f11b6580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/85d19fe6bb4e/disk-a8773743.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/30c683ce26e1/vmlinux-a8773743.xz kernel image: https://storage.googleapis.com/syzbot-assets/4db5027513d2/bzImage-a8773743.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f80c62f371ba6a1e7d79@syzkaller.appspotmail.com usb 1-1: config 0 interface 0 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: New USB device found, idVendor=0cf3, idProduct=9374, bcdDevice=bc.3b usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ------------[ cut here ]------------ workqueue: ath6kl_wq is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU. WARNING: kernel/workqueue.c:5856 at __alloc_workqueue+0x1d02/0x2070 kernel/workqueue.c:5855, CPU#0: kworker/0:3/5630 Modules linked in: CPU: 0 UID: 0 PID: 5630 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__alloc_workqueue+0x1d07/0x2070 kernel/workqueue.c:5855 Code: e9 36 f9 ff ff e8 e9 89 37 00 e9 05 fb ff ff e8 df 89 37 00 e9 92 fb ff ff e8 d5 89 37 00 48 8d 3d 1e b7 43 0e 48 8b 74 24 20 <67> 48 0f b9 3a 81 cd 00 01 00 00 e9 88 e5 ff ff e8 b4 89 37 00 48 RSP: 0018:ffffc90004606bc8 EFLAGS: 00010293 RAX: ffffffff818e312b RBX: 0000000000000000 RCX: ffff8880342dbe00 RDX: 0000000000000000 RSI: ffff8880448f3d68 RDI: ffffffff8fd1e850 RBP: 0000000000000000 R08: ffff8880342dbe00 R09: 0000000000000002 R10: 0000000000000100 R11: 0000000000000102 R12: dffffc0000000000 R13: ffff8880448f3c00 R14: ffffc90004606ce0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125a76000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb09f620f5 CR3: 0000000028f60000 CR4: 00000000003526f0 Call Trace: alloc_workqueue_va kernel/workqueue.c:5950 [inline] alloc_workqueue_noprof+0xe3/0x210 kernel/workqueue.c:5966 ath6kl_usb_create drivers/net/wireless/ath/ath6kl/usb.c:639 [inline] ath6kl_usb_probe+0xaa/0x1580 drivers/net/wireless/ath/ath6kl/usb.c:1143 usb_probe_interface+0x659/0xc70 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:706 __driver_probe_device+0x1e2/0x350 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c8/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 device_add+0x7ec/0xb90 drivers/base/core.c:3772 usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x3b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:706 __driver_probe_device+0x1e2/0x350 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c8/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 device_add+0x7ec/0xb90 drivers/base/core.c:3772 usb_new_device+0x9f8/0x16e0 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x2a49/0x4f60 drivers/usb/core/hub.c:5953 process_one_work+0x98b/0x1630 kernel/workqueue.c:3326 process_scheduled_works kernel/workqueue.c:3409 [inline] worker_thread+0xb49/0x1140 kernel/workqueue.c:3490 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: e9 36 f9 ff ff jmp 0xfffff93b 5: e8 e9 89 37 00 call 0x3789f3 a: e9 05 fb ff ff jmp 0xfffffb14 f: e8 df 89 37 00 call 0x3789f3 14: e9 92 fb ff ff jmp 0xfffffbab 19: e8 d5 89 37 00 call 0x3789f3 1e: 48 8d 3d 1e b7 43 0e lea 0xe43b71e(%rip),%rdi # 0xe43b743 25: 48 8b 74 24 20 mov 0x20(%rsp),%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 81 cd 00 01 00 00 or $0x100,%ebp 35: e9 88 e5 ff ff jmp 0xffffe5c2 3a: e8 b4 89 37 00 call 0x3789f3 3f: 48 rex.W --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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