INFO: task kworker/0:2:5217 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller-ged492c95f13a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D
stack:20048 pid:5217 tgid:5217 ppid:2 task_flags:0x4288060 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x6bd/0xb10 kernel/locking/mutex.c:730
rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
rtnl_net_dev_lock+0x146/0x360 net/core/dev.c:2119
unregister_netdev+0x15/0x60 net/core/dev.c:11965
usbnet_disconnect+0x109/0x500 drivers/net/usb/usbnet.c:1637
usb_unbind_interface+0x1da/0x9a0 drivers/usb/core/driver.c:458
device_remove drivers/base/dd.c:569 [inline]
device_remove+0x122/0x170 drivers/base/dd.c:561
__device_release_driver drivers/base/dd.c:1273 [inline]
device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296
bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
device_del+0x396/0x9f0 drivers/base/core.c:3855
usb_disable_device+0x368/0x7e0 drivers/usb/core/message.c:1418
usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2316
hub_port_connect drivers/usb/core/hub.c:5371 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
port_event drivers/usb/core/hub.c:5831 [inline]
hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5913
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task kworker/1:4:25663 blocked for more than 144 seconds.
Not tainted 6.14.0-rc6-syzkaller-ged492c95f13a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:24656 pid:25663 tgid:25663 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x6bd/0xb10 kernel/locking/mutex.c:730
reg_check_chans_work+0x84/0x1130 net/wireless/reg.c:2481
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0:
ffffffff88ebe8c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
ffffffff88ebe8c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
ffffffff88ebe8c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
4 locks held by kworker/1:1/52:
#0: ffff8881f593d2d8
(&rq->__lock
){-.-.}-{2:2}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1:
ffffc90000537d18
((work_completion)(&(&d->rc_query_work)->work)
#2){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffff8881f592a318 (&base->lock
){-.-.}-{2:2}
, at: lock_timer_base+0x12f/0x1e0 kernel/time/timer.c:1046
#3: ffffffff935fc630
(&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x149/0x4a0 lib/debugobjects.c:818
1 lock held by dhcpcd/2883:
2 locks held by getty/2903:
#0: ffff8881153180a0 (
&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
6 locks held by kworker/0:2/5217:
#0: ffff8881062cf948
((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1: ffffc9000218fd18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2:
ffff88810af69198
(&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
){....}-{4:4}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5859
#3:
ffff888131a62198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
ffff888131a62198 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2307
#4: ffff88813cd27160
(
&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
#5: ffffffff8a1aff68
(rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
, at: rtnl_net_dev_lock+0x146/0x360 net/core/dev.c:2119
4 locks held by udevd/5227:
#0: ffff888114573540
(&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff888112d30088
(&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff8881277a43c8
(kn->active
#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88812c9d6198 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
){....}-{4:4}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2730
4 locks held by udevd/6099:
#0: ffff888114573668
(&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff888112d30c88 (&of->mutex#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff8881193bac38
(kn->active#5){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff888117501198
(&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
){....}-{4:4}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2730
4 locks held by udevd/6635:
#0: ffff88812bdac9e0 (&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff888111d7c888
(&of->mutex#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88811cb68a58
(kn->active#5){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff8881203d8198 (
&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
&dev->mutex){....}-{4:4}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2730
6 locks held by kworker/0:7/10808:
#0: ffff8881062cf948 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1:
ffffc9000159fd18
((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffff88810b7ec198
(&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5859
#3:
ffff888117501198
(&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff8881355f4160 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5: ffffffff8a1aff68
(rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock_killable include/linux/rtnetlink.h:144 [inline]
(rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x18/0x50 net/core/dev.c:11053
3 locks held by kworker/u8:2/13892:
#0: ffff888112019948
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1:
ffffc900125c7d18
((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffffffff8a1aff68 (rtnl_mutex
){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
){+.+.}-{4:4}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4730
2 locks held by kworker/u8:3/15172:
#0:
ffff888100089148
((wq_completion)events_unbound){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1:
ffffc90002727d18 (connector_reaper_work){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
6 locks held by kworker/1:5/23232:
#0: ffff8881062cf948
((wq_completion)usb_hub_wq){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1:
ffffc900020dfd18
((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffff88810b389198
(&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
){....}-{4:4}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5859
#3: ffff88812c9d6198
(
&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff8881072bd160 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5: ffffffff8a1aff68
(rtnl_mutex){+.+.}-{4:4}, at: ieee80211_register_hw+0x20ce/0x40d0 net/mac80211/main.c:1530
6 locks held by kworker/0:6/23450:
#0: ffff8881062cf948
((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1: ffffc900017bfd18 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffff88810b7bf198 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1030 [inline]
, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5859
#3:
ffff8881203d8198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
ffff8881203d8198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff888114699160
(&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
(&dev->mutex){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5:
ffffffff8a1aff68 (rtnl_mutex){+.+.}-{4:4}
, at: rtnl_net_lock_killable include/linux/rtnetlink.h:144 [inline]
, at: register_netdev+0x18/0x50 net/core/dev.c:11053
3 locks held by kworker/1:4/25663:
#0: ffff888100081d48
((wq_completion)events_power_efficient
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1: ffffc90011dc7d18
((reg_check_chans).work
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffffffff8a1aff68 (rtnl_mutex){+.+.}-{4:4}
, at: reg_check_chans_work+0x84/0x1130 net/wireless/reg.c:2481
2 locks held by kworker/u8:4/26749:
#0:
ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1: ffffc9000181fd18
(
(reaper_work).work){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller-ged492c95f13a #0
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+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:236 [inline]
watchdog+0xf62/0x12b0 kernel/hung_task.c:399
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
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 UID: 0 PID: 2883 Comm: dhcpcd Not tainted 6.14.0-rc6-syzkaller-ged492c95f13a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_acquire+0x22c/0x3c40 kernel/locking/lockdep.c:5137
Code: 74 54 f6 84 24 48 01 00 00 01 75 4a 4e 8d 74 3e d8 48 ba 00 00 00 00 00 fc ff df 49 8d 7e 20 48 89 fe 48 c1 ee 03 0f b6 14 16 <84> d2 74 09 80 fa 03 0f 8e d0 12 00 00 41 0f b7 56 20 8b 7c 24 20
RSP: 0018:ffffc900001c8b08 EFLAGS: 00000806
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffff11022a60c56 RDI: ffff8881153062b0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000005 R12: ffff8881f592a318
R13: ffff8881153057c0 R14: ffff888115306290 R15: 0000000000000050
FS: 00007fbfa33dd740(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555655864a8 CR3: 0000000115d82000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
expire_timers kernel/time/timer.c:1836 [inline]
__run_timers+0x572/0x930 kernel/time/timer.c:2414
__run_timer_base kernel/time/timer.c:2426 [inline]
__run_timer_base kernel/time/timer.c:2418 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2435
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2445
handle_softirqs+0x206/0x8d0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
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:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x621/0x6f0 kernel/printk/printk.c:2431
Code: 85 ed 0f 85 81 00 00 00 e8 7c ec 1f 00 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 98 e7 1f 00 4d 85 e4 0f 85 8d 00 00 00 5a ec 1f 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00
RSP: 0018:ffffc900016df288 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000039 RCX: ffffffff815b670e
RDX: ffff8881153057c0 RSI: ffffffff815b6718 RDI: 0000000000000007
RBP: 1ffff920002dbe53 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000200 R14: ffff8881032d8000 R15: ffffc900016df350
dev_vprintk_emit drivers/base/core.c:4891 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4902
__netdev_printk+0x1f7/0x500 net/core/dev.c:12296
netdev_err+0xe5/0x120 net/core/dev.c:12348
asix_set_sw_mii drivers/net/usb/asix_common.c:78 [inline]
asix_check_host_enable+0x190/0x240 drivers/net/usb/asix_common.c:98
__asix_mdio_read+0xa3/0x270 drivers/net/usb/asix_common.c:506
asix_phy_reset+0x106/0x1f0 drivers/net/usb/asix_devices.c:215
ax88178_reset+0x42e/0x12f0 drivers/net/usb/asix_devices.c:1126
usbnet_open+0xcc/0xbf0 drivers/net/usb/usbnet.c:899
__dev_open+0x2d4/0x540 net/core/dev.c:1635
__dev_change_flags+0x561/0x720 net/core/dev.c:9254
dev_change_flags+0x8f/0x160 net/core/dev.c:9326
devinet_ioctl+0x11d9/0x1f50 net/ipv4/devinet.c:1208
inet_ioctl+0x3aa/0x3f0 net/ipv4/af_inet.c:1001
sock_do_ioctl+0x116/0x280 net/socket.c:1199
sock_ioctl+0x41c/0x690 net/socket.c:1318
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
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: 0033:0x7fbfa34abd49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd910f63b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbfa33dd6c0 RCX: 00007fbfa34abd49
RDX: 00007ffd911065a8 RSI: 0000000000008914 RDI: 0000000000000005
RBP: 00007ffd91116768 R08: 00007ffd91106568 R09: 00007ffd91106518
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd911065a8 R14: 0000000000000028 R15: 0000000000008914