netdev - [syzbot] [kernel?] INFO: task hung in rescuer

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Message-ID: <6989280d.050a0220.3b3015.0063.GAE@google.com>
Date: Sun, 08 Feb 2026 16:19:25 -0800
From: syzbot <syzbot+1d6360305e34d30ab396@...kaller.appspotmail.com>
To: bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com, 
	linux-kernel@...r.kernel.org, mingo@...hat.com, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, tglx@...nel.org, x86@...nel.org
Subject: [syzbot] [kernel?] INFO: task hung in rescuer_thread (3)

Hello,

syzbot found the following issue on:

HEAD commit:    9a9424c756fe net: usb: sr9700: remove code to drive nonexi..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17040a52580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2c36acc86fd56a9d
dashboard link: https://syzkaller.appspot.com/bug?extid=1d6360305e34d30ab396
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=115d0a5a580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/aca10cd84bc5/disk-9a9424c7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/65bf8ad42e4f/vmlinux-9a9424c7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a69a5e1088ef/bzImage-9a9424c7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1d6360305e34d30ab396@...kaller.appspotmail.com

INFO: task kworker/R-wg-cr:5992 blocked for more than 149 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/R-wg-cr state:D stack:25984 pid:5992  tgid:5992  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (wg-crypt-wg1)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5260 [inline]
 __schedule+0x14ea/0x5050 kernel/sched/core.c:6867
 __schedule_loop kernel/sched/core.c:6949 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:6964
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7021
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
 worker_detach_from_pool kernel/workqueue.c:2730 [inline]
 rescuer_thread+0x593/0x1390 kernel/workqueue.c:3560
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Showing all locks held in the system:
1 lock held by kworker/R-rcu_g/4:
 #0: ffffffff8e3f8c88 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline]
 #0: ffffffff8e3f8c88 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x593/0x1390 kernel/workqueue.c:3560


---
This report is generated by a bot. It may contain errors.
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