[syzbot] [kernel?] INFO: task hung in rescuer_thread (3)
From: syzbot <hidden>
Date: 2026-02-09 00:19:26
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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@syzkaller.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. 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