INFO: task kworker/0:0:9 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:20992 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
usb_kill_urb+0x1cf/0x2f0 drivers/usb/core/urb.c:717
usb_start_wait_urb+0x22a/0x5b0 drivers/usb/core/message.c:74
usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
get_bMaxPacketSize0 drivers/usb/core/hub.c:4851 [inline]
hub_port_init+0xb0b/0x28b0 drivers/usb/core/hub.c:5047
hub_port_connect drivers/usb/core/hub.c:5496 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x24e2/0x4cf0 drivers/usb/core/hub.c:5953
process_one_work+0x93a/0x12b0 kernel/workqueue.c:3326
process_scheduled_works kernel/workqueue.c:3409 [inline]
worker_thread+0xb05/0x10d0 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
Showing all locks held in the system:
5 locks held by kworker/0:0/9:
#0: ffff88801ab29538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc900000e7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffff88802b18c210 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
#2: ffff88802b18c210 (&dev->mutex){....}-{4:4}, at: hub_event+0x187/0x4cf0 drivers/usb/core/hub.c:5899
#3: ffff88802b1a6658 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3252 [inline]
#3: ffff88802b1a6658 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5464 [inline]
#3: ffff88802b1a6658 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
#3: ffff88802b1a6658 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5871 [inline]
#3: ffff88802b1a6658 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x20ad/0x4cf0 drivers/usb/core/hub.c:5953
#4: ffff88802a8cb658 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5465 [inline]
#4: ffff88802a8cb658 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
#4: ffff88802a8cb658 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5871 [inline]
#4: ffff88802a8cb658 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x20e1/0x4cf0 drivers/usb/core/hub.c:5953
2 locks held by kworker/0:1/10:
#0: ffff88813fe4a538 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc900000f7c60 ((gc_work).work){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
1 lock held by rcub/0/19:
#0: ffffffff8dfc8c08 (rcu_state){+.+.}-{0:0}, at: rcu_boost kernel/rcu/tree_plugin.h:1206 [inline]
#0: ffffffff8dfc8c08 (rcu_state){+.+.}-{0:0}, at: rcu_boost_kthread+0x30d/0x4c0 kernel/rcu/tree_plugin.h:1231
1 lock held by khungtaskd/39:
#0: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6777
9 locks held by kworker/u8:11/1200:
#0: ffff888033d91938 ((wq_completion)wg-kex-wg2#9){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc900061ffc60 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#3: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x261/0xc50 net/core/dev.c:6670
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: ip6_input+0x23/0x270 net/ipv6/ip6_input.c:544
#5: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#5: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#5: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
#5: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
#6: ffffffff8de591a0 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#7: ffff8880330bf320 (_T->lock){....}-{2:2}, at: rt_mutex_slowunlock+0xbf/0xa20 kernel/locking/rtmutex.c:1430
#8: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#8: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#8: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: __rt_spin_trylock kernel/locking/spinlock_rt.c:110 [inline]
#8: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x10c/0x2b0 kernel/locking/spinlock_rt.c:118
2 locks held by getty/5363:
#0: ffff888036a6b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5618:
#0: ffff8880346b0500 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
5 locks held by kworker/u8:1/24078:
#0: ffff88813fe8c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc9000803fc60 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffff888039804310 (&devlink->lock_key#3){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x57/0xcb0 drivers/net/netdevsim/dev.c:909
#3: ffff88803efe2120 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#3: ffff88803efe2120 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report drivers/net/netdevsim/dev.c:862 [inline]
#3: ffff88803efe2120 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x1e0/0xcb0 drivers/net/netdevsim/dev.c:922
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#4: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
2 locks held by syz.2.11422/32163:
#0: ffff888033d9f5f0 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x1e3/0xd70 net/unix/af_unix.c:2579
#1: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#1: ffffffff8dfc3040 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
1 lock held by syz.4.11446/32207:
#0: ffffffff8e6b57e0 (key_types_sem){++++}-{4:4}, at: key_type_lookup+0x29/0xc0 security/keys/key.c:720
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1200 Comm: kworker/u8:11 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:__bfs kernel/locking/lockdep.c:1817 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1862 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2798 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3171 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3286 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3910 [inline]
RIP: 0010:__lock_acquire+0x18fa/0x2ce0 kernel/locking/lockdep.c:5239
Code: 13 25 ff 0f 00 00 39 05 40 c3 db 11 73 06 89 05 38 c3 db 11 48 8b 02 48 89 df 4c 39 e8 0f 84 34 fe ff ff 4c 89 78 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 20 fe ff ff 48 89 fb 48 c7 c7 30 03 e9
RSP: 0018:ffffc900061ff0a8 EFLAGS: 00000002
RAX: ffffffff96162bf8 RBX: 00000000000003cd RCX: 0000000000000046
RDX: ffffffff96000dd8 RSI: ffff888029034ad0 RDI: 00000000000003cd
RBP: 1c8fe69fb3c5126a R08: ffffc900061ff070 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff81a10810 R12: 0000000000000045
R13: ffffffff931da250 R14: ffff888029033e00 R15: ffffffff960495a8
FS: 0000000000000000(0000) GS:ffff888125ed4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05ddae7dac CR3: 000000002aa46000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870
seqcount_lockdep_reader_access+0x55/0x100 include/linux/seqlock.h:73
ktime_get+0x45/0x220 kernel/time/timekeeping.c:971
hrtick_start+0x99/0x250 kernel/sched/core.c:980
enqueue_task+0x75/0x410 kernel/sched/core.c:2184
sched_change_end+0x213/0x600 kernel/sched/core.c:11244
class_sched_change_destructor kernel/sched/sched.h:4208 [inline]
rt_mutex_setprio+0x4a0/0x910 kernel/sched/core.c:7694
rt_mutex_adjust_prio kernel/locking/rtmutex.c:547 [inline]
mark_wakeup_next_waiter+0x385/0x620 kernel/locking/rtmutex.c:1343
__rt_mutex_futex_unlock+0xce/0x1c0 kernel/locking/rtmutex_api.c:225
rt_mutex_futex_unlock+0xc6/0x140 kernel/locking/rtmutex_api.c:237
rcu_preempt_deferred_qs kernel/rcu/tree_plugin.h:621 [inline]
rcu_note_context_switch+0x19a/0xef0 kernel/rcu/tree_plugin.h:356
__schedule+0x296/0x5530 kernel/sched/core.c:7088
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:710
RIP: 0010:__local_bh_enable_ip+0x1c2/0x2b0 kernel/softirq.c:307
Code: f7 89 df e8 60 01 00 00 41 f7 c4 00 02 00 00 74 05 e8 e2 af 45 00 9c 58 a9 00 02 00 00 75 23 41 f7 c4 00 02 00 00 74 01 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 00 26 ac 09 cc 90 0f 0b 90 e9 66 fe
RSP: 0018:ffffc900061ff988 EFLAGS: 00000206
RAX: 0000000000000002 RBX: ffff88803ab5f0a0 RCX: 0000000000000046
RDX: 0000000000000006 RSI: ffffffff8d65601e RDI: ffffffff8baa4c80
RBP: 1ffff1100520693e R08: ffffffff8f8c6df7 R09: 1ffffffff1f18dbe
R10: dffffc0000000000 R11: fffffbfff1f18dbf R12: 0000000000000286
R13: dffffc0000000000 R14: ffff8880290349f4 R15: 0000000000000001
local_bh_enable include/linux/bottom_half.h:33 [inline]
read_unlock_bh include/linux/rwlock_rt.h:73 [inline]
wg_socket_send_skb_to_peer+0x199/0x200 drivers/net/wireguard/socket.c:183
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
wg_packet_handshake_send_worker+0x204/0x370 drivers/net/wireguard/send.c:51
process_one_work+0x93a/0x12b0 kernel/workqueue.c:3326
process_scheduled_works kernel/workqueue.c:3409 [inline]
worker_thread+0xb05/0x10d0 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