INFO: task udevd:5932 blocked for more than 143 seconds.
Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D
stack:22600 pid:5932 tgid:5932 ppid:5211 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746
device_lock include/linux/device.h:922 [inline]
uevent_show+0x17d/0x340 drivers/base/core.c:2730
dev_attr_show+0x55/0xc0 drivers/base/core.c:2424
sysfs_kf_seq_show+0x32b/0x4a0 fs/sysfs/file.c:65
seq_read_iter+0x461/0xda0 fs/seq_file.c:230
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x9a0/0xb90 fs/read_write.c:570
ksys_read+0x19d/0x2d0 fs/read_write.c:713
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3a2116b6a
RSP: 002b:00007fff9b2e94b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055d75bd72710 RCX: 00007fe3a2116b6a
RDX: 0000000000001000 RSI: 000055d75bd94f40 RDI: 0000000000000008
RBP: 000055d75bd72710 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007fff9b2e9998 R15: 000000000000000a
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0:
ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by getty/5597:
#0: ffff888031e970a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc900036be2f0
(&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
11 locks held by kworker/1:5/5895:
4 locks held by udevd/5932:
#0:
ffff88804243c9e0
(
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xda0 fs/seq_file.c:182
#1: ffff888025299088 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff8880670f1f08 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888027111198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff888027111198 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2730
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5895 Comm: kworker/1:5 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:__lock_acquire+0x834/0xd80 kernel/locking/lockdep.c:-1
Code: c4 4c 89 f8 48 c1 e8 20 89 c1 c1 c1 04 41 29 c4 44 31 e1 44 01 f8 41 29 cf 89 ca c1 c2 06 44 31 fa 01 c1 89 d6 c1 c6 08 29 d0 <31> c6 01 ca 29 f1 89 f0 c1 c0 10 31 c8 01 d6 89 c5 c1 c5 13 29 c2
RSP: 0018:ffffc90004b6e140 EFLAGS: 00000812
RAX: 0000000056dc8c8f RBX: 0000000000000007 RCX: 000000006c760f20
RDX: 000000006e47e5c8 RSI: 0000000047e5c86e RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000009c4e421f
R13: ffff888031f5bc00 R14: ffff888031f5c828 R15: 00000000ba20d7a1
FS: 0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000003ea030 CR3: 000000006c690000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
srcu_read_lock_nmisafe include/linux/srcu.h:346 [inline]
console_srcu_read_lock kernel/printk/printk.c:288 [inline]
console_flush_all+0x1c9/0xec0 kernel/printk/printk.c:3203
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0x151/0x3b0 kernel/printk/printk.c:3325
vprintk_emit+0x761/0xa40 kernel/printk/printk.c:2450
dev_vprintk_emit+0x358/0x420 drivers/base/core.c:4891
dev_printk_emit+0xdf/0x130 drivers/base/core.c:4902
__netdev_printk+0x3e0/0x4d0 net/core/dev.c:12403
netdev_warn+0x12d/0x180 net/core/dev.c:12456
asix_write_cmd drivers/net/usb/asix_common.c:57 [inline]
asix_set_sw_mii drivers/net/usb/asix_common.c:75 [inline]
asix_check_host_enable drivers/net/usb/asix_common.c:98 [inline]
__asix_mdio_read drivers/net/usb/asix_common.c:506 [inline]
asix_mdio_read+0x23b/0x620 drivers/net/usb/asix_common.c:529
asix_phy_reset+0xc6/0x1b0 drivers/net/usb/asix_devices.c:215
ax88172_bind+0x438/0x630 drivers/net/usb/asix_devices.c:275
usbnet_probe+0xa28/0x2820 drivers/net/usb/usbnet.c:1772
usb_probe_interface+0x650/0xbc0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2b9/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
usb_set_configuration+0x1999/0x1fe0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:250
usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2b9/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
usb_new_device+0x1052/0x19a0 drivers/usb/core/hub.c:2663
hub_port_connect drivers/usb/core/hub.c:5531 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
port_event drivers/usb/core/hub.c:5831 [inline]
hub_event+0x2bfd/0x50f0 drivers/usb/core/hub.c:5913
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245