INFO: task udevd:32703 blocked for more than 149 seconds.
Not tainted 6.10.0-rc4-syzkaller-00053-g819984a0dd36 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:25360 pid:32703 tgid:32703 ppid:2401 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xca6/0x3170 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
device_lock include/linux/device.h:1009 [inline]
uevent_show+0x188/0x3b0 drivers/base/core.c:2743
dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x869/0xbd0 fs/read_write.c:476
ksys_read+0x12f/0x260 fs/read_write.c:619
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: 0033:0x7f9c31649b6a
RSP: 002b:00007ffe7c0407b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055b1589eafa0 RCX: 00007f9c31649b6a
RDX: 0000000000001000 RSI: 000055b1589f1510 RDI: 0000000000000008
RBP: 000055b1589eafa0 R08: 0000000000000008 R09: 0000000000000008
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffe7c040c98 R15: 000000000000000a
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff886b4660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff886b4660 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff886b4660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/2459:
#0: ffff888107a870a0 (&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:2211
1 lock held by syz-fuzzer/2513:
6 locks held by kworker/1:6/5189:
#0: ffff8881052c4d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc90001dbfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffff8881097d7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff8881097d7190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff8881097ea510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline]
#3: ffff8881097ea510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline]
#3: ffff8881097ea510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
#3: ffff8881097ea510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline]
#3: ffff8881097ea510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b8/0x4f50 drivers/usb/core/hub.c:5903
#4: ffff888109346468 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline]
#4: ffff888109346468 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
#4: ffff888109346468 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline]
#4: ffff888109346468 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x28de/0x4f50 drivers/usb/core/hub.c:5903
#5: ffffffff8911e1f0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x1a7/0x1e60 drivers/usb/core/hub.c:3021
5 locks held by kworker/0:6/20371:
#0: ffff8881052c4d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc90005b47d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffff8881097d1190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff8881097d1190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888133f09190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff888133f09190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff88811a496160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff88811a496160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
5 locks held by kworker/0:2/25519:
#0: ffff8881052c4d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc9000905fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffff888107f73190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888107f73190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff88810eb17190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88810eb17190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888112eab160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff888112eab160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
4 locks held by udevd/32703:
#0: ffff88811ec229e0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff888115331488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88810676cd28 (kn->active){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff8881097d1190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff8881097d1190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
2 locks held by kworker/0:1/369:
#0: ffff888100080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc90004077d80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
1 lock held by syz-executor.1/6600:
1 lock held by syz-executor.0/6982:
#0: ffffffff886bfdf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:323
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc4-syzkaller-00053-g819984a0dd36 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:379
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 633 Comm: syz-executor.4 Not tainted 6.10.0-rc4-syzkaller-00053-g819984a0dd36 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:rcu_is_watching+0x0/0xc0 kernel/rcu/tree.c:720
Code: c7 00 74 c9 86 e8 40 7d 58 05 65 8a 05 85 14 ca 7e 0f b6 c0 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 53 65 ff 05 7b f2 c9 7e e8 de 7c 58 05 48 c7 c3 e8
RSP: 0018:ffffc90000007d70 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 1ffff92000000fb1 RCX: ffffffff8131766b
RDX: fffffbfff137b813 RSI: 0000000000000008 RDI: ffffffff89bdc090
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff137b812
R10: ffffffff89bdc097 R11: 0000000000000002 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff886e0f88 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febd8b88270 CR3: 0000000115862000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x47b/0x560 kernel/locking/lockdep.c:5725
seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline]
timekeeping_debug_get_ns+0x86/0x5b0 kernel/time/timekeeping.c:256
timekeeping_get_ns kernel/time/timekeeping.c:401 [inline]
ktime_get_update_offsets_now+0x100/0x310 kernel/time/timekeeping.c:2323
hrtimer_update_base kernel/time/hrtimer.c:634 [inline]
hrtimer_interrupt+0x142/0x800 kernel/time/hrtimer.c:1795
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x8b/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:340
Code: 41 bd 03 00 00 00 4c 8b 75 00 31 db 4d 85 f6 74 1e 48 8b 74 dd 10 4c 89 e2 4c 89 ef 48 83 c3 01 48 8b 4c 24 28 e8 8c fd ff ff <49> 39 de 75 e2 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 48 83 f8 40
RSP: 0018:ffffc90004ed7698 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8115455e
RDX: ffff88811bc5d700 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff86c5ae00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000003 R15: 0000000000000001
unwind_next_frame+0xebe/0x23a0 arch/x86/kernel/unwind_orc.c:641
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0x696/0xd40 mm/page_alloc.c:2583
vfree+0x181/0x7a0 mm/vmalloc.c:3346
kcov_put kernel/kcov.c:429 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:425
kcov_close+0x10/0x20 kernel/kcov.c:525
__fput+0x408/0xbb0 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa9b/0x2b20 kernel/exit.c:874
do_group_exit+0xd3/0x2a0 kernel/exit.c:1023
get_signal+0x2618/0x2710 kernel/signal.c:2909
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+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c30201d0d
Code: Unable to access opcode bytes at 0x7f5c30201ce3.
RSP: 002b:00007ffe0a541838 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007f5c30201d0d
RDX: 0000000000000038 RSI: 00007f5c30336020 RDI: 00000000000000f9
RBP: 00007ffe0a54188c R08: 00007ffe0a54116c R09: 00007ffe0a541587
R10: 00007ffe0a5411d0 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000035ad85 R14: 000000000035a729 R15: 0000000000000010