INFO: task syz-executor:2654 blocked for more than 143 seconds.
Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:24032 pid:2654 tgid:2654 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xcda/0x2f80 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
d_revalidate fs/namei.c:868 [inline]
d_revalidate fs/namei.c:865 [inline]
lookup_fast+0x239/0x540 fs/namei.c:1679
walk_component+0x5b/0x5b0 fs/namei.c:2035
link_path_walk.part.0.constprop.0+0x669/0xd40 fs/namei.c:2404
link_path_walk fs/namei.c:2336 [inline]
path_openat+0x238/0x2d20 fs/namei.c:3882
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
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: 0033:0x7f758054d7f1
RSP: 002b:00007ffc76be9030 EFLAGS: 00000287
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000000ea RCX: 00007f758054d7f1
RDX: 0000000000090800 RSI: 00007f75805c10a5 RDI: 00000000ffffff9c
RBP: 00007ffc76be90cc R08: 000000000000c35a R09: 00007f75803ca080
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 00000000000409a9 R14: 00000000000409a9 R15: 00007ffc76be9120
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0:
ffffffff88ebb660 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
5 locks held by kworker/1:1/36:
3 locks held by kworker/1:2/42:
#0:
ffff8881066cb948 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc900004d7d80 ((work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888109b5e190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
2 locks held by kworker/u8:5/291:
#0: ffff888100089148
((wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc900016efd80
((work_completion)(&sub_info->work)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
2 locks held by getty/2609:
#0:
ffff888113e600a0
(
&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:2211
2 locks held by kworker/1:3/4926:
#0:
ffff888100080948
(
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc900021bfd80
(
free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
4 locks held by udevd/4933:
#0:
ffff888111bd9d58
(
&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1:
ffff88811169c088 (&of->mutex#2){+.+.}-{3:3}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88811f176698 (kn->active#23
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff888104f94190 (&dev->mutex){....}-{3:3}
, at: device_lock_interruptible include/linux/device.h:1014 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
7 locks held by kworker/1:6/5890:
#0:
ffff8881066cb948 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1:
ffffc9000fdcfd80
((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888109b5a190 (
&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
#3:
ffff888104f94190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
#4: ffff88812e422160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff88812e422160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
#4: ffff88812e422160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
#5:
ffffffff89bab988
(
input_mutex){+.+.}-{3:3}
, at: __input_unregister_device+0x136/0x450 drivers/input/input.c:2275
#6: ffffffff88ec6df8
(
rcu_state.exp_mutex){+.+.}-{3:3}
, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
1 lock held by syz-executor/6340:
#0: ffffffff88ec6df8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
2 locks held by kworker/u8:0/6350:
#0:
ffff888100089148
((wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000146fd80
(
(work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
2 locks held by kworker/u8:3/6383:
#0: ffff888100089148
(
(wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1:
ffffc9000fce7d80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
1 lock held by kworker/u8:0/6443:
1 lock held by modprobe/6461:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 Comm: kworker/1:1 Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events dvb_usb_read_remote_control
RIP: 0010:enqueue_timer+0x1c5/0x550 kernel/time/timer.c:670
Code: 89 e6 e8 5e 39 13 00 45 84 e4 0f 85 3b 01 00 00 e8 70 37 13 00 48 8d 7d 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 18 03 00 00 4d 89 f4 4c 2b 65 50 31 ff 4c 89 e6
RSP: 0018:ffffc900001b8b18 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: ffffffff9364ac00 RCX: ffffffff81415d6c
RDX: 1ffff1103eb256ea RSI: ffffffff81415c20 RDI: ffff8881f592b750
RBP: ffff8881f592b700 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff872a6b20 R12: 0000000000000001
R13: ffffffff9364ac20 R14: 0000000100003093 R15: 000000000003c44c
FS: 0000000000000000(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056302ebc2728 CR3: 0000000115610000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
internal_add_timer kernel/time/timer.c:688 [inline]
__mod_timer+0x8d7/0xdc0 kernel/time/timer.c:1183
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers+0x74b/0xaf0 kernel/time/timer.c:2417
__run_timer_base kernel/time/timer.c:2428 [inline]
__run_timer_base kernel/time/timer.c:2421 [inline]
run_timer_base+0x111/0x190 kernel/time/timer.c:2437
run_timer_softirq+0x24/0x40 kernel/time/timer.c:2448
handle_softirqs+0x209/0x8e0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xac/0x110 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2010 [inline]
RIP: 0010:vprintk_emit+0x396/0x600 kernel/printk/printk.c:2347
Code: 00 4d 85 e4 0f 85 04 02 00 00 e8 a5 ce 1e 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 03 d1 1e 00 48 85 ed 0f 85 10 02 00 00 85 ce 1e 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00
RSP: 0018:ffffc90000267b78 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000000003e RCX: ffffffff8135c706
RDX: ffff888105aa8000 RSI: ffffffff8135c710 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000200
R13: ffff8881026b3a80 R14: ffffffff87c487e0 R15: ffffc90000267bf8
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
dvb_usb_read_remote_control+0x174/0x1c0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:263
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244