INFO: task kworker/0:7:15805 blocked for more than 143 seconds.
Not tainted 5.15.103-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7 state:D stack:23160 pid:15805 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5023 [inline]
__schedule+0x1348/0x4610 kernel/sched/core.c:6369
schedule+0x11b/0x1f0 kernel/sched/core.c:6452
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6511
__mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
hwrng_register+0x3da/0x4c0 drivers/char/hw_random/core.c:518
chaoskey_probe+0x79d/0xb40 drivers/usb/misc/chaoskey.c:205
usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396
really_probe+0x24e/0xb60 drivers/base/dd.c:595
__driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750
driver_probe_device+0x50/0x420 drivers/base/dd.c:780
__device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x359/0x570 drivers/base/dd.c:974
bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
device_add+0xb48/0xfd0 drivers/base/core.c:3394
usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238
usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293
really_probe+0x24e/0xb60 drivers/base/dd.c:595
__driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750
driver_probe_device+0x50/0x420 drivers/base/dd.c:780
__device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x359/0x570 drivers/base/dd.c:974
bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
device_add+0xb48/0xfd0 drivers/base/core.c:3394
usb_new_device+0xc17/0x18d0 drivers/usb/core/hub.c:2568
hub_port_connect drivers/usb/core/hub.c:5358 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
port_event drivers/usb/core/hub.c:5648 [inline]
hub_event+0x2dd8/0x56d0 drivers/usb/core/hub.c:5730
process_one_work+0x90d/0x1270 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/901:
#0: ffffffff8cff3568 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xdd/0x280 drivers/char/hw_random/core.c:436
2 locks held by kworker/u4:5/1436:
2 locks held by getty/3273:
#0: ffff888023f74098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
6 locks held by kworker/0:7/15805:
#0: ffff888141f8d938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279
#1: ffffc90007177d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281
#2: ffff8881480dc220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff8881480dc220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
#3: ffff88803ef35220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88803ef35220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
#4:
ffff88803b7b61a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
ffff88803b7b61a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
#5: ffffffff8cff3568 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
4 locks held by udevd/17052:
#0: ffff88801e1508b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xae/0xd10 fs/seq_file.c:182
#1: ffff88807b9f1488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x50/0x3b0 fs/kernfs/file.c:112
#2: ffff88808afdb0f0 (kn->active#89){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x3b0 fs/kernfs/file.c:113
#3: ffff88803ef35220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline]
#3: ffff88803ef35220 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x22/0x90 drivers/usb/core/sysfs.c:141
4 locks held by syz-executor.2/17468:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xf54/0xfa0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3627 Comm: syz-fuzzer Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0033:0x45e6cf
Code: 48 8d 0d b4 ab ca 00 eb 13 31 c0 48 8b 6c 24 48 48 83 c4 50 c3 48 8b 89 30 02 00 00 48 85 c9 74 14 48 39 81 28 01 00 00 77 eb <48> 39 81 30 01 00 00 76 e2 eb 02 31 c9 89 5c 24 60 48 85 c9 74 63
RSP: 002b:000000c002e43908 EFLAGS: 00000287
RAX: 0000000000a12240 RBX: 0000000000035d60 RCX: 0000000001109260
RDX: 0000000000cc5d38 RSI: 0000000000000090 RDI: 0000000000000090
RBP: 000000c002e43950 R08: 0000000000000197 R09: 0000000000000004
R10: 000000c00025c660 R11: 0000000000000000 R12: 000000c002e439f8
R13: 0000000000000000 R14: 000000c000007a00 R15: 000000c030cbc800
FS: 000000c030cbc890 GS: 0000000000000000