INFO: task udevd:3427 blocked for more than 143 seconds.
Not tainted 6.13.0-rc1-syzkaller-gd8d936c51388 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:27776 pid:3427 tgid:3427 ppid:2849 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x102c/0x34b0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
device_lock include/linux/device.h:1014 [inline]
uevent_show+0x188/0x3b0 drivers/base/core.c:2729
dev_attr_show+0x53/0xe0 drivers/base/core.c:2423
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x87f/0xbe0 fs/read_write.c:565
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f017e118b6a
RSP: 002b:00007ffd16a9a728 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055f19fe7d780 RCX: 00007f017e118b6a
RDX: 0000000000001000 RSI: 000055f19fe86e10 RDI: 0000000000000008
RBP: 000055f19fe7d780 R08: 0000000000000008 R09: 0000000000000400
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffd16a9ac08 R15: 000000000000000a
Showing all locks held in the system:
8 locks held by kworker/1:0/24:
1 lock held by khungtaskd/30:
#0:
ffffffff88ebc400 (
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+0x7f/0x390 kernel/locking/lockdep.c:6744
5 locks held by kworker/1:1/36:
2 locks held by getty/2907:
#0: ffff88810836f0a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900000432f0 (
&ldata->atomic_read_lock){+.+.}-{4:4}
, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
4 locks held by udevd/3411:
#0:
ffff8881129f7540 (
&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1:
ffff888113ea7888
(
&of->mutex#2
){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88810ab7f0f8
(
kn->active
#5
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff88810af1c190
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
4 locks held by udevd/3427:
#0:
ffff8881129f7418 (
&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1:
ffff888113ea7088
(
&of->mutex#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2:
ffff88810ab7f0f8
(
kn->active
#5
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff88810af1c190
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller-gd8d936c51388 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
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:
imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted 6.13.0-rc1-syzkaller-gd8d936c51388 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:memset_orig+0x84/0xb0 arch/x86/lib/memset_64.S:100
Code: 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1 e9 03 66 0f 1f 44 00 00 ff c9 48 89 07 48 8d 7f 08 75 f5 83 e2 07 74 0a ff ca 88 07 <48> 8d 7f 01 75 f6 4c 89 d0 c3 cc cc cc cc 48 83 fa 07 76 e3 48 89
RSP: 0018:ffffc900001b7fe8 EFLAGS: 00000046
RAX: 2020202020202020 RBX: ffffc900001b8411 RCX: 0000000000000020
RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffffc900001b8412
RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000007
R10: ffffc900001b840f R11: 0000000000183143 R12: 1ffff92000037000
R13: 000000007ffffffe R14: 0000000000000002 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f210db5c440 CR3: 000000011676a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
move_right lib/vsprintf.c:606 [inline]
widen_string+0x27a/0x2a0 lib/vsprintf.c:627
string_nocheck lib/vsprintf.c:654 [inline]
string+0x1fa/0x3d0 lib/vsprintf.c:728
vsnprintf+0xbed/0x1880 lib/vsprintf.c:2848
sprintf+0xcd/0x110 lib/vsprintf.c:3052
print_caller kernel/printk/printk.c:1392 [inline]
info_print_prefix+0x147/0x350 kernel/printk/printk.c:1409
record_print_text+0x141/0x400 kernel/printk/printk.c:1456
printk_get_next_message+0x2be/0x690 kernel/printk/printk.c:3008
console_emit_next_record kernel/printk/printk.c:3076 [inline]
console_flush_all+0x6ec/0xc60 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
dev_vprintk_emit drivers/base/core.c:4935 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4946
__dev_printk+0xf5/0x270 drivers/base/core.c:4958
_dev_warn+0xe5/0x120 drivers/base/core.c:5002
usb_rx_callback_intf0+0x11c/0x1a0 drivers/media/rc/imon.c:1768
__usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1820
handle_softirqs+0x206/0x8d0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:655
irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline]
RIP: 0010:gc_worker+0x2e1/0x1760 net/netfilter/nf_conntrack_core.c:1534
Code: 00 00 48 c7 c7 e8 24 56 8a e8 bb a1 2e fb 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 79 cf 51 fb 48 85 db 58 0f 85 3d 10 00 00 fa cc 51 fb eb 07 e8 f3 cc 51 fb f3 90 44 8b 35 6a 9f 4c 04 44
RSP: 0018:ffffc9000019fbc8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8609911a
RDX: ffff888101e90000 RSI: ffffffff86099129 RDI: 0000000000000007
RBP: ffff888112200000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000019861
R13: dffffc0000000000 R14: 00000000000330c1 R15: 0000000000040000
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244