rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9936/4:b..l P9940/1:b..l P9935/1:b..l P1341/2:b..l P9937/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=56401, q=1026 ncpus=2)
task:cmp state:R running task stack:22784 pid:9937 tgid:9937 ppid:9886 task_flags:0x400000 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:try_to_unlazy+0xa6/0x650 fs/namei.c:889
Code: 00 00 0f 84 a6 05 00 00 48 89 de 48 81 e6 00 02 00 00 31 ff e8 db 59 8c ff 48 81 e3 00 02 00 00 0f 85 fc 02 00 00 4d 8d 66 54 <4c> 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3f 04 00 00 41 8b
RSP: 0018:ffffc9000e41f7e8 EFLAGS: 00000246
RAX: ffffffff823358a5 RBX: 0000000000000000 RCX: ffff88802b95bc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000fffffff6 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000e41f740 R11: fffff52001c83ef1 R12: ffffc9000e41fc74
R13: dffffc0000000000 R14: ffffc9000e41fc20 R15: 1ffff92001c83f85
may_lookup fs/namei.c:1917 [inline]
link_path_walk+0xadc/0x18d0 fs/namei.c:2545
path_openat+0x2bf/0x3df0 fs/namei.c:4792
do_filp_open+0x1fa/0x410 fs/namei.c:4823
do_sys_openat2+0x121/0x200 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_openat fs/open.c:1452 [inline]
__se_sys_openat fs/open.c:1447 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1447
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8813f440ba
RSP: 002b:00007fff0823e588 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fff0823e600 RCX: 00007f8813f440ba
RDX: 0000000000080000 RSI: 00007fff0823e600 RDI: 00000000ffffff9c
RBP: 00007fff0823e5f0 R08: 00007fff0823e7f7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000018
R13: 00007f8813f18000 R14: 00007fff0823e810 R15: 0000000000000000
task:kworker/u8:10 state:R running task stack:21144 pid:1341 tgid:1341 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_is_watching+0x67/0xb0 kernel/rcu/tree.c:752
Code: 89 f7 e8 5c 46 7c 00 48 c7 c3 58 7c b4 91 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 29 9f 0d 10 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f e9 c7 1e 30 09 cc e8 91 76
RSP: 0018:ffffc90004e973f8 EFLAGS: 00000286
RAX: 00000000002aaebc RBX: ffff8880b8833c58 RCX: 0000000080000001
RDX: ffffc90004e97501 RSI: ffffffff8b3f5bc0 RDI: ffffffff8b3f5b80
RBP: dffffc0000000000 R08: ffffc90004e97938 R09: 0000000000000000
R10: ffffc90004e97538 R11: fffff520009d2ea9 R12: ffffc90004e97948
R13: ffffc90004e90000 R14: ffffffff8d018dd0 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:895 [inline]
class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0x1a6d/0x23d0 arch/x86/kernel/unwind_orc.c:695
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5657 [inline]
__kmalloc_node_track_caller_noprof+0x3a2/0x810 mm/slub.c:5764
kmalloc_reserve+0x136/0x290 net/core/skbuff.c:608
__alloc_skb+0x204/0x3a0 net/core/skbuff.c:690
alloc_skb include/linux/skbuff.h:1383 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:818 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:875 [inline]
nsim_dev_trap_report_work+0x29f/0xbc0 drivers/net/netdevsim/dev.c:921
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
task:syz.7.916 state:R running task stack:24888 pid:9935 tgid:9935 ppid:7465 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0xc7d/0x23d0 arch/x86/kernel/unwind_orc.c:-1
Code: 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 a0 15 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 b7 15 00 00 48 0f bf 02 <49> 01 c4 48 8d 5e 01 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 6f 11
RSP: 0000:ffffc9000e37ecb8 EFLAGS: 00000246
RAX: 0000000000000038 RBX: ffffffff8f75d87d RCX: ffffffff8efb3858
RDX: ffffffff8f75d87c RSI: ffffffff8f75d880 RDI: ffffffff8b3f5b80
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8d5ae940
R10: ffffc9000e37edd8 R11: ffffffff81ab9960 R12: ffffc9000e37f008
R13: ffffc9000e37edd8 R14: ffffc9000e37ed88 R15: ffffc9000e37edc0
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf7/0x1f0 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xfe1/0x1170 mm/page_alloc.c:2973
discard_slab mm/slub.c:3346 [inline]
__put_partials+0x149/0x170 mm/slub.c:3886
__slab_free+0x2af/0x330 mm/slub.c:5952
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x18d/0x6c0 mm/slub.c:5270
vm_area_dup+0x2b/0x670 mm/vma_init.c:123
__split_vma+0x1ad/0x9e0 mm/vma.c:511
vms_gather_munmap_vmas+0x2e2/0x12f0 mm/vma.c:1400
__mmap_setup mm/vma.c:2403 [inline]
__mmap_region mm/vma.c:2727 [inline]
mmap_region+0x73d/0x1cf0 mm/vma.c:2823
do_mmap+0xc23/0x10c0 mm/mmap.c:558
vm_mmap_pgoff+0x2a9/0x4d0 mm/util.c:581
ksys_mmap_pgoff+0x4e9/0x720 mm/mmap.c:604
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f011d52f783
RSP: 002b:00007ffcc35d1e08 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f011d786308 RCX: 00007f011d52f783
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007f011b32b000
RBP: 00007f011d786270 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f011d786270 R14: 00000000000012ca R15: 0000000000000004
task:syz.7.916 state:R running task stack:25728 pid:9940 tgid:9935 ppid:7465 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
class_preempt_destructor include/linux/preempt.h:468 [inline]
try_to_wake_up+0x82b/0x12b0 kernel/sched/core.c:4225
autoremove_wake_function+0x17/0x100 kernel/sched/wait.c:403
__wake_up_common kernel/sched/wait.c:108 [inline]
__wake_up_common_lock+0x136/0x1e0 kernel/sched/wait.c:125
__unix_dgram_recvmsg+0x486/0xd60 net/unix/af_unix.c:2601
sock_recvmsg_nosec+0x186/0x1c0 net/socket.c:1078
____sys_recvmsg+0x3ab/0x470 net/socket.c:2810
___sys_recvmsg+0x1b5/0x510 net/socket.c:2854
do_recvmmsg+0x30d/0x770 net/socket.c:2949
__sys_recvmmsg net/socket.c:3023 [inline]
__do_sys_recvmmsg net/socket.c:3046 [inline]
__se_sys_recvmmsg net/socket.c:3039 [inline]
__x64_sys_recvmmsg+0x190/0x240 net/socket.c:3039
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f011d52f749
RSP: 002b:00007f011b76d038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f011d786090 RCX: 00007f011d52f749
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f011d5b3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f011d786128 R14: 00007f011d786090 R15: 00007ffcc35d1d48
task:syz.9.917 state:R running task stack:23936 pid:9936 tgid:9936 ppid:6715 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5945
Code: 18 00 00 b8 ff ff ff ff 65 0f c1 05 63 82 e1 06 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 48 c7
RSP: 0000:ffffc9000e3ef8e8 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8cfe08a2 RDI: ffffffff8b3f5be0
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000259cc1 R12: 0000000000000246
R13: ffff88803913bc80 R14: ffffffff8d5ae940 R15: 0000000000000001
xa_entry include/linux/xarray.h:1226 [inline]
xas_reload+0x1a2/0x480 include/linux/xarray.h:1624
next_uptodate_folio+0x15f/0x5d0 mm/filemap.c:3714
filemap_map_pages+0x123f/0x1cc0 mm/filemap.c:3929
do_fault_around mm/memory.c:5713 [inline]
do_read_fault mm/memory.c:5746 [inline]
do_fault mm/memory.c:5889 [inline]
do_pte_missing+0x175b/0x27a0 mm/memory.c:4401
handle_pte_fault mm/memory.c:6273 [inline]
__handle_mm_fault mm/memory.c:6411 [inline]
handle_mm_fault+0xcc1/0x1330 mm/memory.c:6580
do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x71/0xd0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f98a012f2ed
RSP: 002b:00007fff89c89810 EFLAGS: 00010202
RAX: 000000110c284000 RBX: 00007f98a0fd5720 RCX: 0000000000000007
RDX: 000000000000003a RSI: 0000000000000100 RDI: 0000000000000080
RBP: ffffffff8ad0403a R08: 00007f98a04a6038 R09: 00007f98a0492000
R10: 00007f989fcb7008 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8ad04f78 R15: 00000000000000c2
rcu: rcu_preempt kthread starved for 10278 jiffies! g56401 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27544 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145f/0x5070 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:751
Code: e8 fb 7a 2c 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 8d 01 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 5c 46 7c 00 48 c7 c3 58 7c b4 91 49 03 1e 48 89
RSP: 0018:ffffc90000157100 EFLAGS: 00000046
RAX: 1ffffffff1a031ba RBX: 0000000000000000 RCX: 0000000080000002
RDX: 0000000000000001 RSI: ffffffff8b3f5bc0 RDI: ffffffff8b3f5b80
RBP: ffffc90000157288 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200002ae20 R12: dffffc0000000000
R13: ffffffff8ad460d3 R14: ffffffff8d018dd0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888126cec000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c7d52ce80 CR3: 0000000031c5e000 CR4: 00000000003526f0
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3b0 kernel/locking/lockdep.c:5879
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x1b/0x80 kernel/locking/spinlock.c:194
unlock_rt_mutex_safe kernel/locking/rtmutex.c:344 [inline]
rt_mutex_slowunlock+0x493/0x8a0 kernel/locking/rtmutex.c:1454
__ieee80211_queue_skb_to_iface+0xa1/0x280 net/mac80211/rx.c:238
ieee80211_queue_skb_to_iface net/mac80211/rx.c:261 [inline]
ieee80211_rx_h_mgmt+0x493/0x650 net/mac80211/rx.c:4157
ieee80211_rx_handlers+0x8e98/0xba30 net/mac80211/rx.c:4232
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4262 [inline]
ieee80211_prepare_and_rx_handle+0x257f/0x6700 net/mac80211/rx.c:5132
__ieee80211_rx_handle_packet net/mac80211/rx.c:5405 [inline]
ieee80211_rx_list+0x2605/0x2fd0 net/mac80211/rx.c:5544
ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5567
ieee80211_rx include/net/mac80211.h:5216 [inline]
ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452
tasklet_action_common+0x2bf/0x540 kernel/softirq.c:925
handle_softirqs+0x1df/0x650 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
run_ktimerd+0x69/0x100 kernel/softirq.c:1138
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 29 Comm: ktimers/1 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4879 [inline]
RIP: 0010:__lock_acquire+0x525/0x2cf0 kernel/locking/lockdep.c:5187
Code: 00 48 83 c3 28 41 89 c4 49 39 cf 0f 8d c7 00 00 00 49 83 ff 31 0f 83 83 00 00 00 8b 03 25 ff 1f 00 00 48 0f a3 05 bb 5c 1e 11 <73> 10 48 69 c0 c8 00 00 00 48 8d 88 90 e3 5b 92 eb 32 83 3d c2 ec
RSP: 0000:ffffc90000a3f4a0 EFLAGS: 00000003
RAX: 000000000000000b RBX: ffff88801bea2ab8 RCX: 0000000000000007
RDX: 0000000000000003 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffff88801bea2ae8 R08: ffffffff8ad44faa R09: ffffffff8d604178
R10: dffffc0000000000 R11: fffffbfff1db686f R12: 0000000000000003
R13: ffff88801bea2ae8 R14: ffff88801bea1e40 R15: 0000000000000005
FS: 0000000000000000(0000) GS:ffff888126dec000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000003a0030 CR3: 000000005b408000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]
rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
rt_spin_lock+0x14a/0x3e0 kernel/locking/spinlock_rt.c:57
spin_lock include/linux/spinlock_rt.h:44 [inline]
kcov_remote_start+0x12d/0x710 kernel/kcov.c:886
kcov_remote_start_usb include/linux/kcov.h:55 [inline]
kcov_remote_start_usb_softirq include/linux/kcov.h:68 [inline]
__usb_hcd_giveback_urb+0x38a/0x5e0 drivers/usb/core/hcd.c:1660
dummy_timer+0x8a0/0x46f0 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x542/0xd00 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x1a3/0x2e0 kernel/time/hrtimer.c:1858
handle_softirqs+0x1df/0x650 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
run_ktimerd+0x69/0x100 kernel/softirq.c:1138
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246