INFO: task kworker/u4:4:56 blocked for more than 143 seconds.
Not tainted 6.1.0-rc4-next-20221111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4 state:D
stack:27400 pid:56 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5211 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6523
schedule+0xda/0x1b0 kernel/sched/core.c:6599
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1283
fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:208
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task kworker/u4:5:5425 blocked for more than 144 seconds.
Not tainted 6.1.0-rc4-next-20221111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5 state:D
stack:26496 pid:5425 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5211 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6523
schedule+0xda/0x1b0 kernel/sched/core.c:6599
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1283
fsnotify_mark_destroy_workfn+0xfd/0x3c0 fs/notify/mark.c:898
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0:
ffffffff8bf881f0
(rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0:
ffffffff8bf87ef0
(
rcu_tasks_trace.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
6 locks held by kworker/1:0/22:
1 lock held by khungtaskd/28:
#0:
ffffffff8bf88d40
(
rcu_read_lock
){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6494
2 locks held by kworker/u4:4/56:
#0:
ffff888011879138
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1:
ffffc90001577da8
(connector_reaper_work
){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
2 locks held by getty/4920:
#0: ffff88802669c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
6 locks held by kworker/1:2/5330:
3 locks held by udevd/5331:
#0: ffff888027f63888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:236 [inline]
#0: ffff888027f63888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x7a0 fs/kernfs/file.c:276
#1: ffff88807ea50490 (kn->active#24){.+.+}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:237 [inline]
#1: ffff88807ea50490 (kn->active#24){.+.+}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x7a0 fs/kernfs/file.c:276
#2: ffff8880798e6190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:856 [inline]
#2: ffff8880798e6190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874
3 locks held by udevd/5336:
#0: ffff888016f72088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:236 [inline]
#0: ffff888016f72088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x7a0 fs/kernfs/file.c:276
#1:
ffff888027373cb8
(
kn->active#24){.+.+}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:237 [inline]
kn->active#24){.+.+}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x7a0 fs/kernfs/file.c:276
#2: ffff88801d022190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:856 [inline]
#2: ffff88801d022190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874
9 locks held by kworker/0:0/5344:
3 locks held by udevd/5364:
#0:
ffff8880224a5088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:236 [inline]
ffff8880224a5088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x7a0 fs/kernfs/file.c:276
#1: ffff88807e233490 (kn->active#24){.+.+}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:237 [inline]
#1: ffff88807e233490 (kn->active#24){.+.+}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x7a0 fs/kernfs/file.c:276
#2: ffff88802655e190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:856 [inline]
#2: ffff88802655e190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874
6 locks held by kworker/1:3/5399:
2 locks held by kworker/u4:5/5425:
#0:
ffff888011879138
((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc9000497fda8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
6 locks held by kworker/1:6/5437:
3 locks held by udevd/5451:
#0:
ffff88802aea8c88
(&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:236 [inline]
(&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x7a0 fs/kernfs/file.c:276
#1:
ffff88802a7fa578 (kn->active#24){.+.+}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:237 [inline]
ffff88802a7fa578 (kn->active#24){.+.+}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x7a0 fs/kernfs/file.c:276
#2: ffff888075b04190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:856 [inline]
#2: ffff888075b04190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874
3 locks held by udevd/5462:
#0:
ffff88806f3fc888
(
&of->mutex
){+.+.}-{3:3}
, at: kernfs_file_read_iter fs/kernfs/file.c:236 [inline]
, at: kernfs_fop_read_iter+0x189/0x7a0 fs/kernfs/file.c:276
#1:
ffff888070d62ae8
(
kn->active
#24
){.+.+}-{0:0}
, at: kernfs_file_read_iter fs/kernfs/file.c:237 [inline]
, at: kernfs_fop_read_iter+0x1ac/0x7a0 fs/kernfs/file.c:276
#2:
ffff888076751190
(
&dev->mutex
){....}-{3:3}
, at: device_lock_interruptible include/linux/device.h:856 [inline]
, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc4-next-20221111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc71/0xfc0 kernel/hung_task.c:377
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5399 Comm: kworker/1:3 Not tainted 6.1.0-rc4-next-20221111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: usb_hub_wq hub_event
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:59 [inline]
RIP: 0010:unwind_next_frame+0x149f/0x1cc0 arch/x86/kernel/unwind_orc.c:641
Code: 00 0f 85 f2 06 00 00 49 8d 7d 10 49 8b 6d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c5 06 00 00 <48> 39 dd 49 8b 45 10 0f 87 f3 fa ff ff 48 39 d8 0f 86 ea fa ff ff
RSP: 0018:ffffc900001e07e0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9000491f6f0 RCX: 0000000000000001
RDX: 1ffff9200003c10c RSI: ffffc9000491f6c0 RDI: ffffc900001e0860
RBP: ffffc90004918000 R08: ffffffff8ea40610 R09: ffffc900001e0884
R10: fffff5200003c115 R11: ffffc9000491f6e8 R12: ffffc900001e0885
R13: ffffc900001e0850 R14: ffffc9000491f6c0 R15: ffffffff8ea40614
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7d0c0fa8 CR3: 000000001f65a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511
____kasan_slab_free mm/kasan/common.c:241 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:205
kasan_slab_free include/linux/kasan.h:178 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750
slab_free mm/slub.c:3653 [inline]
kmem_cache_free+0xea/0x5b0 mm/slub.c:3675
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:820
__kfree_skb net/core/skbuff.c:877 [inline]
consume_skb net/core/skbuff.c:1044 [inline]
consume_skb+0xd4/0x160 net/core/skbuff.c:1038
mac80211_hwsim_tx_frame+0x1f6/0x2a0 drivers/net/wireless/mac80211_hwsim.c:2054
mac80211_hwsim_beacon_tx+0x55c/0xab0 drivers/net/wireless/mac80211_hwsim.c:2116
__iterate_interfaces+0x2c8/0x550 net/mac80211/util.c:799
ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:835
mac80211_hwsim_beacon+0xfd/0x1f0 drivers/net/wireless/mac80211_hwsim.c:2142
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x690/0xfb0 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:207
Code: 48 89 ef 5d e9 a1 3c 34 00 5d be 03 00 00 00 e9 66 c2 89 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 51 cc 86 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc9000491e798 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888028df8000 RSI: ffffffff81623fe1 RDI: 0000000000000007
RBP: ffffc9000491e7d8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000036
R13: ffff888016a18000 R14: 0000000000000200 R15: ffffc9000491e8f8
console_trylock_spinning kernel/printk/printk.c:1919 [inline]
vprintk_emit+0x3f7/0x5f0 kernel/printk/printk.c:2267
dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4736
dev_printk_emit+0xba/0xf1 drivers/base/core.c:4747
__dev_printk+0xcf/0xf5 drivers/base/core.c:4759
_dev_warn+0xd7/0x109 drivers/base/core.c:4803
hid_parser_main.cold+0xa2/0xf1 drivers/hid/hid-core.c:633
hid_open_report+0x37f/0x650 drivers/hid/hid-core.c:1265
hid_parse include/linux/hid.h:1094 [inline]
hidled_probe+0x9d/0x700 drivers/hid/hid-led.c:462
hid_device_probe+0x296/0x3c0 drivers/hid/hid-core.c:2600
call_driver_probe drivers/base/dd.c:560 [inline]
really_probe+0x249/0xb90 drivers/base/dd.c:639
__driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
__device_attach_driver+0x1d0/0x2e0 drivers/base/dd.c:936
bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
__device_attach+0x1e4/0x530 drivers/base/dd.c:1008
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
device_add+0xbd5/0x1e90 drivers/base/core.c:3517
hid_add_device+0x373/0xa10 drivers/hid/hid-core.c:2752
usbhid_probe+0xbaa/0x1020 drivers/hid/usbhid/hid-core.c:1424
usb_probe_interface+0x30b/0x7f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:560 [inline]
really_probe+0x249/0xb90 drivers/base/dd.c:639
__driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
__device_attach_driver+0x1d0/0x2e0 drivers/base/dd.c:936
bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
__device_attach+0x1e4/0x530 drivers/base/dd.c:1008
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
device_add+0xbd5/0x1e90 drivers/base/core.c:3517
usb_set_configuration+0x1019/0x1900 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
usb_probe_device+0xd4/0x2c0 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:560 [inline]
really_probe+0x249/0xb90 drivers/base/dd.c:639
__driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
__device_attach_driver+0x1d0/0x2e0 drivers/base/dd.c:936
bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
__device_attach+0x1e4/0x530 drivers/base/dd.c:1008
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
device_add+0xbd5/0x1e90 drivers/base/core.c:3517
usb_new_device.cold+0x685/0x10ad drivers/usb/core/hub.c:2573
hub_port_connect drivers/usb/core/hub.c:5405 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5549 [inline]
port_event drivers/usb/core/hub.c:5709 [inline]
hub_event+0x2d58/0x4810 drivers/usb/core/hub.c:5791
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308