INFO: task udevd:6707 blocked for more than 152 seconds.
Not tainted 6.14.0-rc2-syzkaller-g4dc1d1bec898 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D
stack:25784 pid:6707 tgid:6707 ppid:5207 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
device_lock include/linux/device.h:1030 [inline]
uevent_show+0x17d/0x340 drivers/base/core.c:2729
dev_attr_show+0x55/0xc0 drivers/base/core.c:2423
sysfs_kf_seq_show+0x331/0x4c0 fs/sysfs/file.c:59
seq_read_iter+0x43f/0xd70 fs/seq_file.c:230
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x975/0xb40 fs/read_write.c:565
ksys_read+0x18f/0x2b0 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe6b4b16b6a
RSP: 002b:00007fffa8005328 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000559b5fdd6730 RCX: 00007fe6b4b16b6a
RDX: 0000000000001000 RSI: 0000559b5fe0a890 RDI: 0000000000000008
RBP: 0000559b5fdd6730 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007fffa8005808 R15: 000000000000000a
Showing all locks held in the system:
5 locks held by kworker/1:0/25:
1 lock held by khungtaskd/30:
#0:
ffffffff8e9387e0
(rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
5 locks held by kworker/u8:4/62:
5 locks held by kworker/1:2/975:
6 locks held by kworker/0:2/1206:
#0: ffff888144a8e548
((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3211 [inline]
, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
#1: ffffc900047bfc60
(
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3212 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
#2: ffff888145701190
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5851
#3:
ffff88802a4b9190
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#4: ffff888034cc0160
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#5:
ffffffff8f75bbc8
(
input_mutex
){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:203 [inline]
, at: input_register_device+0xaf5/0x1130 drivers/input/input.c:2408
4 locks held by udevd/5207:
2 locks held by getty/5590:
#0:
ffff8880315b20a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc90002fde2f0
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
6 locks held by kworker/0:3/5861:
6 locks held by kworker/1:4/5894:
4 locks held by udevd/6692:
#0:
ffff88806eff6e80
(
&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff888064fc7088
(&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2:
ffff888028cba3c8
(
kn->active#5
){++++}-{0:0}
, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3:
ffff888028db1190
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
1 lock held by syz-executor.1/6693:
#0:
ffffffff8e93dcb8
(
rcu_state.exp_mutex){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline]
, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:996
4 locks held by udevd/6707:
#0:
ffff88801e7241c8
(
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1:
ffff88802fe4c488
(
&of->mutex
#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2:
ffff8881447fe008
(kn->active
#5
){++++}-{0:0}
, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3:
ffff888145701190
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
4 locks held by kworker/1:5/6919:
2 locks held by kworker/1:7/6945:
4 locks held by udevd/7447:
#0: ffff88803324e540
(&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1:
ffff88803209f888
(
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff888028aefe18
(kn->active
#5){++++}-{0:0}
, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3:
ffff8881453f1190
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
2 locks held by syz-executor.1/7701:
#0: ffff888145364d78
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#1:
ffffffff90022ba8
(uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410
2 locks held by syz-executor.3/7704:
#0:
ffff88814536cd78
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: __driver_attach+0x454/0x710 drivers/base/dd.c:1215
#1:
ffffffff90022ba8
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410
2 locks held by syz-executor.4/7705:
#0:
ffff888145370d78
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: __driver_attach+0x454/0x710 drivers/base/dd.c:1215
#1:
ffffffff90022ba8
(uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410
2 locks held by syz-executor/7707:
#0:
ffff888145360d78
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: __driver_attach+0x454/0x710 drivers/base/dd.c:1215
#1: ffffffff90022ba8
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410
2 locks held by syz-executor.2/7709:
#0:
ffff888145368d78
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: __driver_attach+0x454/0x710 drivers/base/dd.c:1215
#1: ffffffff90022ba8
(uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410
2 locks held by syz-executor.3/7713:
#0:
ffff8880290bc118
(
&data->open_mutex){+.+.}-{4:4}
, at: vhci_create_device+0x34/0x6b0 drivers/bluetooth/hci_vhci.c:469
#1: ffffffff8f2ca4c8
(gdp_mutex
){+.+.}-{4:4}
, at: get_device_parent+0x1a5/0x410 drivers/base/core.c:3242
2 locks held by syz-executor.4/7714:
#0: ffff8880654ee118
(&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device+0x34/0x6b0 drivers/bluetooth/hci_vhci.c:469
#1:
ffffffff8f2ca4c8
(
gdp_mutex
){+.+.}-{4:4}
, at: get_device_parent+0x1a5/0x410 drivers/base/core.c:3242
2 locks held by syz-executor/7715:
#0:
ffff88806ba7c118
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device+0x34/0x6b0 drivers/bluetooth/hci_vhci.c:469
#1: ffffffff8f2ca4c8
(gdp_mutex
){+.+.}-{4:4}
, at: get_device_parent+0x1a5/0x410 drivers/base/core.c:3242
2 locks held by syz-executor.2/7717:
#0:
ffff88805c126118
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device+0x34/0x6b0 drivers/bluetooth/hci_vhci.c:469
#1:
ffffffff8f2ca4c8
(
gdp_mutex
){+.+.}-{4:4}
, at: get_device_parent+0x1a5/0x410 drivers/base/core.c:3242
2 locks held by dhcpcd/7718:
#0: ffff8880684f6258
(sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1624 [inline]
, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3253
#1:
ffffffff8e93dcb8
(rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:996
1 lock held by dhcpcd/7719:
#0:
ffff88806985e258
(sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1624 [inline]
, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3253
1 lock held by dhcpcd/7720:
#0: ffff88805c18a258
(
sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1624 [inline]
, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3253
1 lock held by dhcpcd/7721:
#0: ffff888030324258
(sk_lock-AF_PACKET
){+.+.}-{0:0}
, at: lock_sock include/net/sock.h:1624 [inline]
, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3253
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc2-syzkaller-g4dc1d1bec898 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
yealink 4-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6919 Comm: kworker/1:5 Not tainted 6.14.0-rc2-syzkaller-g4dc1d1bec898 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
RIP: 0010:io_serial_out+0x7e/0xc0 drivers/tty/serial/8250/8250_port.c:416
Code: fc 89 e9 41 d3 e7 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 bc 1d af fc 44 03 3b 44 89 f0 44 89 fa ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c a7
RSP: 0018:ffffc90000a17ff0 EFLAGS: 00000002
RAX: 0000000000000034 RBX: ffffffff9a748080 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff8576cadb R09: 1ffff11004a8b046
R10: dffffc0000000000 R11: ffffffff8576ca90 R12: dffffc0000000000
R13: 0000000000000034 R14: 0000000000000034 R15: 00000000000003f8
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559b5fe440a8 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial8250_console_write+0x1430/0x1e00 drivers/tty/serial/8250/8250_port.c:3456
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4890
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4901
_dev_err+0x122/0x170 drivers/base/core.c:4956
urb_ctl_callback+0x1d3/0x290 drivers/input/misc/yealink.c:456
__usb_hcd_giveback_urb+0x42c/0x6e0 drivers/usb/core/hcd.c:1650
dummy_timer+0x856/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1994
__run_hrtimer kernel/time/hrtimer.c:1801 [inline]
__hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1882
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
do_softirq+0x11b/0x1e0 kernel/softirq.c:462
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389
wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
wg_packet_tx_worker+0x160/0x810 drivers/net/wireguard/send.c:276
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244