INFO: task kworker/u8:3:46 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00104-ga160e1202ca3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:3 state:D
stack:25760 pid:46 tgid:46 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xca6/0x3170 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2558
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
__synchronize_srcu+0x1bd/0x2a0 kernel/rcu/srcutree.c:1396
Showing all locks held in the system:
4 locks held by kworker/0:0/7:
4 locks held by kworker/1:0/23:
1 lock held by khungtaskd/29:
#0: ffffffff884b4560 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff884b4560 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff884b4560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
9 locks held by kworker/1:2/617:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90001a6fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888108363190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888108363190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888113962190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff888113962190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888112198160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff888112198160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff88811d789a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#5: ffff88811d789a20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#6: ffffffff890da108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389
#7: ffff888117e848a0 (&led_cdev->led_access){+.+.}-{3:3}, at: led_classdev_register_ext+0x4a6/0xab0 drivers/leds/led-class.c:511
#8: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_add_one+0xb1/0x520 fs/kernfs/dir.c:778
7 locks held by kworker/0:2/2189:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc9000428fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109bae190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109bae190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888114f6e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff888114f6e190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888115d17160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff888115d17160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff888114e5da20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#5: ffff888114e5da20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#6: ffffffff890da108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389
1 lock held by udevd/2401:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
2 locks held by getty/2459:
#0: ffff88810129f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by udevd/5808:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5813:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5814:
7 locks held by kworker/1:4/5820:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90001d4fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109b8e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109b8e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888113964190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff888113964190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888112199160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff888112199160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff8881152b1a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#5: ffff8881152b1a20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#6: ffffffff890da108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389
7 locks held by kworker/1:5/5824:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90001c7fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109f26190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109f26190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888113967190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff888113967190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff88811219f160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff88811219f160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff88810df85a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#5: ffff88810df85a20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#6: ffffffff890da108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389
1 lock held by udevd/5831:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
6 locks held by kworker/1:6/5834:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90001e0fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888108365190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888108365190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff88812d3e7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff88812d3e7190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2296
#4: ffffffff88b57628 (dev_pm_qos_sysfs_mtx){+.+.}-{3:3}, at: dev_pm_qos_constraints_destroy+0x28/0x780 drivers/base/power/qos.c:253
#5: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by udevd/5837:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
7 locks held by kworker/0:3/5838:
#0: ffff888104ed9948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90001ed7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109f06190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109f06190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888114f6d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff888114f6d190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888115d15160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff888115d15160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff88811a779a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#5: ffff88811a779a20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#6: ffffffff890da108 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xa2b/0x1140 drivers/input/input.c:2389
1 lock held by udevd/5839:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5840:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5855:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5912:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by udevd/5939:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
2 locks held by syz-executor.0/6423:
1 lock held by syz-executor.5/6425:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by syz-executor.3/6428:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by syz-executor.1/6429:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by syz-executor.2/6431:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by syz-executor.4/6433:
#0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00104-ga160e1202ca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6423 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00104-ga160e1202ca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 24 f5 b0 7e 65 8b 05 25 f5 b0 7e a9 00 01
RSP: 0018:ffffc90001f5fa20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000011 RCX: ffffffff8195de9c
RDX: ffff88812d380000 RSI: ffffffff8195deb4 RDI: 0000000000000004
RBP: ffff888118e68000 R08: 0000000000000004 R09: 0000000000000011
R10: 0000000000000011 R11: 0000000000000001 R12: 000000000003c5cc
R13: dffffc0000000000 R14: 0000000000100000 R15: 0000000000001c13
FS: 0000000000000000(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8599e7d070 CR3: 000000011653c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_exit_mmap include/trace/events/mmap.h:98 [inline]
exit_mmap+0x580/0xb90 mm/mmap.c:3299
__mmput kernel/fork.c:1346 [inline]
mmput+0xdb/0x420 kernel/fork.c:1368
exit_mm kernel/exit.c:569 [inline]
do_exit+0x999/0x2b80 kernel/exit.c:865
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
get_signal+0x2618/0x2710 kernel/signal.c:2911
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x141/0x250 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c1eebcae9
Code: Unable to access opcode bytes at 0x7f4c1eebcabf.
RSP: 002b:00007fff81604258 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffff92 RBX: 00000000000443a5 RCX: 00007f4c1eebcae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4c1efdbf8c
RBP: 0000000000000bea R08: 00007f4c1efdbf8c R09: 00007f4c1efdbf8c
R10: 00007fff81604390 R11: 0000000000000246 R12: 00007f4c1efdbf8c
R13: 0000000000044f8f R14: 00007fff816043b0 R15: 00007fff81604390