INFO: task syz-executor:2964 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:23752 pid:2964 tgid:2964 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_read_slowpath+0x5dc/0xb30 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0xed/0x460 kernel/locking/rwsem.c:1539
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1185
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1877
walk_component fs/namei.c:2275 [inline]
link_path_walk+0x7a8/0x1b30 fs/namei.c:2653
path_openat+0x1be/0x31a0 fs/namei.c:4832
do_file_open+0x20e/0x430 fs/namei.c:4865
do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a8b10bb3c
RSP: 002b:00007ffe09053da0 EFLAGS: 00000206
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000002ae RCX: 00007f6a8b10bb3c
RDX: 0000000000090800 RSI: 00007f6a8b1a25d3 RDI: 00000000ffffff9c
RBP: 00007ffe09053e4c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000f2
R13: 0000000000000000 R14: 00000000000975b8 R15: 00007ffe09053ea0
INFO: task syz-executor:2965 blocked for more than 171 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:24408 pid:2965 tgid:2965 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_read_slowpath+0x5dc/0xb30 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0xed/0x460 kernel/locking/rwsem.c:1539
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1185
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1877
walk_component fs/namei.c:2275 [inline]
link_path_walk+0x7a8/0x1b30 fs/namei.c:2653
path_openat+0x1be/0x31a0 fs/namei.c:4832
do_file_open+0x20e/0x430 fs/namei.c:4865
do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1c3a6bb3c
RSP: 002b:00007fff98a5a380 EFLAGS: 00000206
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000002e2 RCX: 00007fa1c3a6bb3c
RDX: 0000000000090800 RSI: 00007fa1c3b025d3 RDI: 00000000ffffff9c
RBP: 00007fff98a5a42c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000f6
R13: 0000000000000000 R14: 00000000000975e9 R15: 00007fff98a5a480
INFO: task syz-executor:2966 blocked for more than 172 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:22536 pid:2966 tgid:2966 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_read_slowpath+0x5dc/0xb30 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0xed/0x460 kernel/locking/rwsem.c:1539
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1185
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1877
walk_component fs/namei.c:2275 [inline]
link_path_walk+0x7a8/0x1b30 fs/namei.c:2653
path_openat+0x1be/0x31a0 fs/namei.c:4832
do_file_open+0x20e/0x430 fs/namei.c:4865
do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c32e6bb3c
RSP: 002b:00007fff807e2340 EFLAGS: 00000206
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000002bc RCX: 00007f0c32e6bb3c
RDX: 0000000000090800 RSI: 00007f0c32f025d3 RDI: 00000000ffffff9c
RBP: 00007fff807e23ec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000ec
R13: 0000000000000000 R14: 0000000000097300 R15: 00007fff807e2440
INFO: task syz-executor:2967 blocked for more than 172 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:23896 pid:2967 tgid:2967 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_read_slowpath+0x5dc/0xb30 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0xed/0x460 kernel/locking/rwsem.c:1539
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1185
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1877
walk_component fs/namei.c:2275 [inline]
link_path_walk+0x7a8/0x1b30 fs/namei.c:2653
path_openat+0x1be/0x31a0 fs/namei.c:4832
do_file_open+0x20e/0x430 fs/namei.c:4865
do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0a3c5bb3c
RSP: 002b:00007fffa37b7cf0 EFLAGS: 00000206
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000002ca RCX: 00007fb0a3c5bb3c
RDX: 0000000000090800 RSI: 00007fb0a3cf25d3 RDI: 00000000ffffff9c
RBP: 00007fffa37b7d9c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000f4
R13: 0000000000000000 R14: 00000000000972d4 R15: 00007fffa37b7df0
INFO: task syz-executor:2969 blocked for more than 173 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:23432 pid:2969 tgid:2969 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_read_slowpath+0x5dc/0xb30 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0xed/0x460 kernel/locking/rwsem.c:1539
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1185
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1877
walk_component fs/namei.c:2275 [inline]
link_path_walk+0x7a8/0x1b30 fs/namei.c:2653
path_openat+0x1be/0x31a0 fs/namei.c:4832
do_file_open+0x20e/0x430 fs/namei.c:4865
do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd05f7bb3c
RSP: 002b:00007fffba91b890 EFLAGS: 00000206
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000002e6 RCX: 00007fdd05f7bb3c
RDX: 0000000000090800 RSI: 00007fdd060125d3 RDI: 00000000ffffff9c
RBP: 00007fffba91b93c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000000fd
R13: 0000000000000000 R14: 0000000000096f13 R15: 00007fffba91b990
INFO: task syz.4.1224:9834 blocked for more than 174 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1224 state:D
stack:27384 pid:9834 tgid:9831 ppid:2967 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_write_slowpath+0x530/0x1280 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0xf0 fs/kernfs/dir.c:1717
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:683 [inline]
bus_remove_driver+0x248/0x2e0 drivers/base/bus.c:821
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1752
raw_release+0x19b/0x260 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x3ff/0xb40 fs/file_table.c:469
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x8b8/0x2b60 kernel/exit.c:976
do_group_exit+0xd5/0x2a0 kernel/exit.c:1118
get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x7e/0x430 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x671/0x7b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0a3c5c4ab
RSP: 002b:00007fb0a26b4f00 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007fb0a3c5c4ab
RDX: 00007fb0a26b5fd0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007fb0a26b5fd0 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000000 R15: 00007fb0a3d10ede
INFO: task syz.2.1225:9833 blocked for more than 174 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1225 state:D
stack:27432 pid:9833 tgid:9832 ppid:2966 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xeb1/0x4220 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065
rwsem_down_write_slowpath+0x530/0x1280 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0xf0 fs/kernfs/dir.c:1717
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:683 [inline]
bus_remove_driver+0x248/0x2e0 drivers/base/bus.c:821
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1752
raw_release+0x19b/0x260 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x3ff/0xb40 fs/file_table.c:469
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x8b8/0x2b60 kernel/exit.c:976
do_group_exit+0xd5/0x2a0 kernel/exit.c:1118
get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x7e/0x430 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x671/0x7b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c32e6c4ab
RSP: 002b:00007f0c318c4f00 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f0c32e6c4ab
RDX: 00007f0c318c5fd0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007f0c318c5fd0 R08: 00007f0c32d34567 R09: 00007f0c318c4fc8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000008 R15: 00007f0c32f20ede
Showing all locks held in the system:
5 locks held by kworker/1:0/23:
2 locks held by kworker/1:1/28:
1 lock held by khungtaskd/30:
#0:
ffffffff896de760
(
rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by udevd/2856:
2 locks held by getty/2918:
#0:
ffff888115c620a0
(
&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+0x419/0x1500 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/2964:
1 lock held by syz-executor/2965:
1 lock held by syz-executor/2966:
1 lock held by syz-executor/2967:
1 lock held by syz-executor/2969:
#0:
ffff888101298188
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1167
3 locks held by kworker/0:3/5210:
3 locks held by kworker/0:5/5250:
5 locks held by kworker/1:4/5262:
9 locks held by kworker/1:5/5287:
5 locks held by kworker/0:6/5569:
1 lock held by syz.1.1222/9828:
#0:
ffff888101298188
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_remove_by_name_ns+0x3d/0xf0 fs/kernfs/dir.c:1717
1 lock held by syz.4.1224/9834:
#0:
ffff888101298188
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_remove_by_name_ns+0x3d/0xf0 fs/kernfs/dir.c:1717
1 lock held by syz.2.1225/9833:
#0:
ffff888101298188
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_remove_by_name_ns+0x3d/0xf0 fs/kernfs/dir.c:1717
1 lock held by syz-executor/9837:
1 lock held by syz-executor/9838:
1 lock held by syz-executor/9839:
1 lock held by syz-executor/9840:
1 lock held by syz-executor/9841:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xd25/0x1050 kernel/hung_task.c:515
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
yealink 5-1:36.0: urb_irq_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5262 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_power_efficient gc_worker
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:408
Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1c 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 cc cc cc cc e8 e1 78 f5 fe eb a0 e8 6a 79 f5
RSP: 0000:ffffc900001a8450 EFLAGS: 00000002
RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff83208635 RDI: ffffffff941b8be0
RBP: ffffffff941b8ba0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000005b R14: 0000000000000010 R15: ffffffff832085d0
FS: 0000000000000000(0000) GS:ffff8882687c9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa37b7c08 CR3: 00000000094ae000 CR4: 00000000003506f0
Call Trace:
serial_port_out include/linux/serial_core.h:811 [inline]
serial8250_console_putchar drivers/tty/serial/8250/8250_port.c:3217 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3279 [inline]
serial8250_console_write+0xde8/0x1900 drivers/tty/serial/8250/8250_port.c:3357
console_emit_next_record kernel/printk/printk.c:3183 [inline]
console_flush_one_record+0x790/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
dev_vprintk_emit+0x394/0x3e0 drivers/base/core.c:4915
dev_printk_emit+0xd2/0x10d drivers/base/core.c:4926
__dev_printk+0xcb/0x100 drivers/base/core.c:4938
_dev_err+0xef/0x127 drivers/base/core.c:4981
urb_irq_callback.cold+0x41/0xfd drivers/input/misc/yealink.c:418
__usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657
usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005
__run_hrtimer kernel/time/hrtimer.c:1785 [inline]
__hrtimer_run_queues+0x50e/0xa70 kernel/time/hrtimer.c:1849
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1866
handle_softirqs+0x1de/0x9d0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xed/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__might_resched+0x2f/0x330 kernel/sched/core.c:8843
Code: b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 89 f5 41 54 49 89 fc 55 89 d5 53 48 83 ec 40 48 89 e3 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 0c 1d 00 89 48 c1 eb 03 48 c7 44 24 10 00 f6 82 81
RSP: 0000:ffffc9000316fae0 EFLAGS: 00000282
RAX: dffffc0000000000 RBX: ffffc9000316fae0 RCX: ffffc9000316fb1c
RDX: 0000000000000000 RSI: 0000000000000652 RDI: ffffffff887180a0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff887180a0
R13: 0000000000000652 R14: 0000000000004064 R15: 0000000000001770
gc_worker+0x966/0x1630 net/netfilter/nf_conntrack_core.c:1618
process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276
process_scheduled_works kernel/workqueue.c:3359 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245