INFO: task kworker/1:2:724 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D
stack:21696 pid:724 tgid:724 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
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_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
driver_sysfs_remove drivers/base/dd.c:474 [inline]
really_probe+0x373/0xa90 drivers/base/dd.c:715
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:798
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:828
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:956
bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:457
__device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:532
device_add+0x1188/0x1ab0 drivers/base/core.c:3720
usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:254
usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:294
call_driver_probe drivers/base/dd.c:578 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:656
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:798
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:828
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:956
bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:457
__device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:532
device_add+0x1188/0x1ab0 drivers/base/core.c:3720
usb_new_device+0xd90/0x1a10 drivers/usb/core/hub.c:2652
hub_port_connect drivers/usb/core/hub.c:5521 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x2e66/0x4f50 drivers/usb/core/hub.c:5903
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
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
INFO: task kworker/1:3:4788 blocked for more than 171 seconds.
Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3 state:R running task stack:22144 pid:4788 tgid:4788 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xca6/0x3170 kernel/sched/core.c:6746
usb_generic_driver_probe+0xf7/0x110 drivers/usb/core/generic.c:256
Showing all locks held in the system:
8 locks held by kworker/0:1/8:
#0: ffff888104ebd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc9000008fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109397190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109397190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff88811ea4a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff88811ea4a190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff88811ea48160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff88811ea48160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffffffff89617448 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10411
#6: ffffffff88b418c8 (gdp_mutex){+.+.}-{3:3}, at: get_device_parent+0x102/0x4e0 drivers/base/core.c:3297
#7: ffffffff886a3998 (kernfs_idr_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#7: ffffffff886a3998 (kernfs_idr_lock){+.+.}-{2:2}, at: __kernfs_new_node+0xfa/0x890 fs/kernfs/dir.c:629
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
3 locks held by kworker/1:2/724:
2 locks held by getty/2459:
#0: ffff88810129a0a0 (&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 syz-executor.3/2518:
#0: ffffffff884bfc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff884bfc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.2/2520:
#0: ffffffff884bfc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff884bfc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
4 locks held by udevd/4759:
#0: ffff888115efd8b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff88811d168c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88810efba0f8 (kn->active#18){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88811ea4a190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:995 [inline]
#3: ffff88811ea4a190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:3/4788:
3 locks held by kworker/0:5/4807:
#0: ffff888104ebd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90002327d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888107767190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888107767190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
4 locks held by kworker/1:4/4820:
#0: ffff888104ebd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900021bfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888109760190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888109760190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff888109763510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3207 [inline]
#3: ffff888109763510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x5c4/0x4f50 drivers/usb/core/hub.c:5902
2 locks held by syz-executor.2/5106:
#0: ffffffff88fb8708 (wdm_mutex){+.+.}-{3:3}, at: wdm_release+0x51/0x440 drivers/usb/class/cdc-wdm.c:764
#1: ffff888109763510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3207 [inline]
#1: ffff888109763510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_port_resume+0x2b4/0x1860 drivers/usb/core/hub.c:3765
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5120 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:175 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2d/0x60 kernel/kcov.c:207
Code: fa 65 48 8b 15 24 f5 b0 7e 65 8b 05 25 f5 b0 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 4c 15 00 00 85 c0 74 2b <8b> 82 28 15 00 00 83 f8 02 75 20 48 8b 8a 30 15 00 00 8b 92 2c 15
RSP: 0018:ffffc9000ba77908 EFLAGS: 00000246
RAX: 0000000000000000 RBX: fffffbfff1078360 RCX: ffffffff81348306
RDX: ffff888115f31d00 RSI: ffffffff81348311 RDI: 0000000000000005
RBP: ffffffff883c1b00 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: 000000000013dc20 R12: ffffc9000ba779c0
R13: ffffffff883c1ae0 R14: 0000000000000001 R15: ffffc9000ba779e0
FS: 000055558b529480(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5eb55cd008 CR3: 000000011530c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
prb_first_seq kernel/printk/printk_ringbuffer.c:1986 [inline]
_prb_read_valid+0x551/0x7e0 kernel/printk/printk_ringbuffer.c:2114
prb_read_valid_info+0xac/0xf0 kernel/printk/printk_ringbuffer.c:2216
find_first_fitting_seq+0x1c3/0x230 kernel/printk/printk.c:1538
syslog_print_all+0x195/0x3f0 kernel/printk/printk.c:1670
do_syslog+0x316/0x6a0 kernel/printk/printk.c:1748
__do_sys_syslog kernel/printk/printk.c:1826 [inline]
__se_sys_syslog kernel/printk/printk.c:1824 [inline]
__x64_sys_syslog+0x74/0xb0 kernel/printk/printk.c:1824
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5eb54a2ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcd88fdd58 EFLAGS: 00000246 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5eb54a2ea9
RDX: 000000000000003f RSI: 00007ffcd88fde30 RDI: 0000000000000003
RBP: 00007ffcd88fde30 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcd88fe418
R13: 00007ffcd88fe418 R14: 0000000000000001 R15: 00000000fffffff1