INFO: task syz-executor:17640 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:24552 pid:17640 tgid:17640 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 rwsem_down_read_slowpath+0x64b/0xbf0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1539
 kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
 d_revalidate fs/namei.c:929 [inline]
 d_revalidate fs/namei.c:925 [inline]
 lookup_fast+0x266/0x610 fs/namei.c:1777
 walk_component+0x5b/0x5b0 fs/namei.c:2147
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_openat+0x1b0/0x2cb0 fs/namei.c:4130
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f195726e8c1
RSP: 002b:00007ffca15b40d0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000582 RCX: 00007f195726e8c1
RDX: 0000000000090800 RSI: 00007f19572f2286 RDI: 00000000ffffff9c
RBP: 00007ffca15b417c R08: 0000000000074668 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000001e3
R13: 0000000000000000 R14: 00000000002540f8 R15: 00007ffca15b41d0
 </TASK>
INFO: task syz-executor:18215 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:24552 pid:18215 tgid:18215 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 rwsem_down_read_slowpath+0x64b/0xbf0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1539
 kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
 d_revalidate fs/namei.c:929 [inline]
 d_revalidate fs/namei.c:925 [inline]
 lookup_fast+0x266/0x610 fs/namei.c:1777
 walk_component+0x5b/0x5b0 fs/namei.c:2147
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_openat+0x1b0/0x2cb0 fs/namei.c:4130
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5128b5e8c1
RSP: 002b:00007ffd5674d1c0 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000560 RCX: 00007f5128b5e8c1
RDX: 0000000000090800 RSI: 00007f5128be2286 RDI: 00000000ffffff9c
RBP: 00007ffd5674d26c R08: 00000000000745ae R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000001df
R13: 0000000000000000 R14: 0000000000253da3 R15: 00007ffd5674d2c0
 </TASK>
INFO: task syz-executor:18309 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:24552 pid:18309 tgid:18309 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 rwsem_down_read_slowpath+0x64b/0xbf0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1539
 kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
 d_revalidate fs/namei.c:929 [inline]
 d_revalidate fs/namei.c:925 [inline]
 lookup_fast+0x266/0x610 fs/namei.c:1777
 walk_component+0x5b/0x5b0 fs/namei.c:2147
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_openat+0x1b0/0x2cb0 fs/namei.c:4130
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f86ac96e8c1
RSP: 002b:00007ffdbb2a2bb0 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000534 RCX: 00007f86ac96e8c1
RDX: 0000000000090800 RSI: 00007f86ac9f2286 RDI: 00000000ffffff9c
RBP: 00007ffdbb2a2c5c R08: 000000000007459e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000001d7
R13: 0000000000000000 R14: 0000000000253d00 R15: 00007ffdbb2a2cb0
 </TASK>
INFO: task syz-executor:19346 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:23864 pid:19346 tgid:19346 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 rwsem_down_read_slowpath+0x64b/0xbf0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1539
 kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
 d_revalidate fs/namei.c:929 [inline]
 d_revalidate fs/namei.c:925 [inline]
 lookup_fast+0x266/0x610 fs/namei.c:1777
 walk_component+0x5b/0x5b0 fs/namei.c:2147
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_openat+0x1b0/0x2cb0 fs/namei.c:4130
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdc51ae8c1
RSP: 002b:00007ffee78c2670 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000004dd RCX: 00007efdc51ae8c1
RDX: 0000000000090800 RSI: 00007efdc5232286 RDI: 00000000ffffff9c
RBP: 00007ffee78c271c R08: 00000000000746b4 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000001c3
R13: 0000000000000000 R14: 0000000000254264 R15: 00007ffee78c2770
 </TASK>
INFO: task syz-executor:22852 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:24552 pid:22852 tgid:22852 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 rwsem_down_read_slowpath+0x64b/0xbf0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1539
 kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
 d_revalidate fs/namei.c:929 [inline]
 d_revalidate fs/namei.c:925 [inline]
 lookup_fast+0x266/0x610 fs/namei.c:1777
 walk_component+0x5b/0x5b0 fs/namei.c:2147
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_openat+0x1b0/0x2cb0 fs/namei.c:4130
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9d7fa7e8c1
RSP: 002b:00007ffcd916cf60 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000031e RCX: 00007f9d7fa7e8c1
RDX: 0000000000090800 RSI: 00007f9d7fb02286 RDI: 00000000ffffff9c
RBP: 00007ffcd916d00c R08: 00000000000744da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000122
R13: 0000000000000000 R14: 0000000000253c27 R15: 00007ffcd916d060
 </TASK>

Showing all locks held in the system:
7 locks held by kworker/0:1/10:
1 lock held by khungtaskd/30:
 #0: ffffffff892c89e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff892c89e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
 #0: ffffffff892c89e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
2 locks held by getty/2918:
 #0: ffff8881124b20a0
 (
&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+0x41b/0x14f0 drivers/tty/n_tty.c:2222
4 locks held by udevd/5191:
 #0: ffff88811402d790 (&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xe1/0x12d0 fs/seq_file.c:182
 #1: 
ffff888137d60c88 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x4f/0x2a0 fs/kernfs/file.c:172
 #2: ffff888112077d28 (kn->active
#18){++++}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#18){++++}-{0:0}, at: kernfs_seq_start+0xbc/0x2a0 fs/kernfs/file.c:173
 #3: ffff888134b2c198 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
1 lock held by udevd/5194:
 #0: 
ffff888100ac5988 (
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by udevd/5234:
 #0: 
ffff888100ac5988
 (&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by udevd/5413:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/17640:
 #0: ffff888100ac5988 (
&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/18215:
 #0: ffffffff892d3f78 (rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock+0x284/0x3c0 kernel/rcu/tree_exp.h:311
1 lock held by syz-executor/18309:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
1 lock held by syz-executor/19346:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
5 locks held by kworker/0:7/20332:
1 lock held by syz-executor/22852:
 #0: 
ffff888100ac5988
 (&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1162
4 locks held by kworker/0:8/24205:
2 locks held by kworker/0:0/27320:
1 lock held by syz.2.5447/28779:
 #0: ffff888100ac5988 (&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_activate fs/kernfs/dir.c:1425 [inline]
, at: kernfs_add_one+0x349/0x840 fs/kernfs/dir.c:834
1 lock held by syz-executor/28780:
 #0: 
ffff888100ac5988 (
&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/28781:
 #0: 
ffff888100ac5988 (
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/28782:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/28783:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180
1 lock held by syz-executor/28784:
 #0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1180

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __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:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
 watchdog+0xf3f/0x1170 kernel/hung_task.c:495
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x700 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
yealink 1-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27320 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:407
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 e9 96 7c 69 04 e8 d1 ec 00 ff eb a0 e8 5a ed 00
RSP: 0018:ffffc900000074f0 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: ffffffff82ddb055 RDI: ffffffff93bd9600
RBP: ffffffff93bd95c0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff93bd95c0 R15: ffffffff93bd9880
FS:  0000000000000000(0000) GS:ffff888268ea3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2dd63fff CR3: 00000000090a4000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 serial_out drivers/tty/serial/8250/8250.h:142 [inline]
 serial8250_clear_IER+0x9e/0xc0 drivers/tty/serial/8250/8250_port.c:714
 serial8250_console_write+0x255/0x1890 drivers/tty/serial/8250/8250_port.c:3307
 console_emit_next_record kernel/printk/printk.c:3111 [inline]
 console_flush_all+0x801/0xc60 kernel/printk/printk.c:3199
 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline]
 console_unlock+0xd8/0x210 kernel/printk/printk.c:3298
 vprintk_emit+0x3d7/0x680 kernel/printk/printk.c:2423
 dev_vprintk_emit drivers/base/core.c:4914 [inline]
 dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
 __dev_printk+0xf5/0x270 drivers/base/core.c:4937
 _dev_err+0xe4/0x120 drivers/base/core.c:4980
 urb_ctl_callback+0x1eb/0x2f0 drivers/input/misc/yealink.c:456
 __usb_hcd_giveback_urb+0x38b/0x610 drivers/usb/core/hcd.c:1661
 usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1745
 dummy_timer+0x1809/0x3a00 drivers/usb/gadget/udc/dummy_hcd.c:1995
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1841
 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858
 handle_softirqs+0x208/0x8d0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3200
Code: 00 e8 f2 c2 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 80 c8 20 00 48 85 db 0f 85 55 01 00 00 e8 02 cd 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 f7 00 81
RSP: 0018:ffffc9000caaf868 EFLAGS: 00000293
RAX: ffffffff897fd038 RBX: 0000000000000000 RCX: ffffffff815d9cd0
RDX: ffff888109f45700 RSI: ffffffff815d9cde RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff897fd038
R13: ffffffff897fcfe0 R14: ffffc9000caaf8f8 R15: dffffc0000000000
 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline]
 console_unlock+0xd8/0x210 kernel/printk/printk.c:3298
 vprintk_emit+0x3d7/0x680 kernel/printk/printk.c:2423
 _printk+0xc7/0x100 kernel/printk/printk.c:2448
 legacy_dvb_usb_read_remote_control+0x40b/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:124
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x700 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>