rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
0-....
} 13282 jiffies s: 3357 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1121 Comm: kworker/0:2 Not tainted 6.14.0-rc1-syzkaller-g9682c35ff6ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x70 kernel/kcov.c:217
Code: cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 44 91 88 7e <65> 8b 05 45 91 88 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74
RSP: 0018:ffffc900000073d0 EFLAGS: 00000016
RAX: 0000000000000000 RBX: ffffffff9349c601 RCX: ffffffff82ca530b
RDX: ffff888110359d40 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 0000000000000010 R08: 0000000000000004 R09: 0000000000000010
R10: 0000000000000001 R11: 000000000000000c R12: 0000000000000001
R13: ffffffff82c8cc70 R14: ffffffff93669260 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555699cf4a8 CR3: 0000000008ca2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3373 [inline]
serial8250_console_write+0xfd9/0x1870 drivers/tty/serial/8250/8250_port.c:3456
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x800/0xc60 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
_printk+0xc8/0x100 kernel/printk/printk.c:2457
printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline]
show_trace_log_lvl+0x1b7/0x3d0 arch/x86/kernel/dumpstack.c:285
sched_show_task kernel/sched/core.c:7719 [inline]
sched_show_task+0x424/0x630 kernel/sched/core.c:7694
show_state_filter+0xee/0x320 kernel/sched/core.c:7764
k_spec drivers/tty/vt/keyboard.c:667 [inline]
k_spec+0xed/0x150 drivers/tty/vt/keyboard.c:656
kbd_keycode drivers/tty/vt/keyboard.c:1522 [inline]
kbd_event+0xcbd/0x17a0 drivers/tty/vt/keyboard.c:1541
input_handle_events_default+0x116/0x1b0 drivers/input/input.c:2575
input_pass_values+0x6c4/0x890 drivers/input/input.c:127
input_event_dispose drivers/input/input.c:341 [inline]
input_handle_event+0xf0b/0x14d0 drivers/input/input.c:369
input_repeat_key+0x260/0x350 drivers/input/input.c:2262
call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1840 [inline]
__run_timers+0x6e8/0x930 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_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211
Code: 00 e8 70 9d 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 6e ed 1f 00 48 85 db 0f 85 55 01 00 00 e8 30 f2 1f 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 c5 02 7a
RSP: 0018:ffffc90001f5f4a8 EFLAGS: 00000246
RAX: ffffffff893ac398 RBX: 0000000000000000 RCX: ffffc9000f724000
RDX: 0000000000100000 RSI: ffffffff815b3c40 RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000006 R12: ffffffff893ac398
R13: ffffffff893ac340 R14: ffffc90001f5f538 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
dev_vprintk_emit drivers/base/core.c:4890 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4901
__dev_printk+0xf5/0x270 drivers/base/core.c:4913
_dev_info+0xe5/0x120 drivers/base/core.c:4959
usb_disconnect+0xec/0x920 drivers/usb/core/hub.c:2287
hub_port_connect drivers/usb/core/hub.c:5363 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
port_event drivers/usb/core/hub.c:5823 [inline]
hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5905
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
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
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
task:kworker/R-ext4- state:I stack:30720 pid:2805 tgid:2805 ppid:2 task_flags:0x4208060 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
rescuer_thread+0x946/0xe20 kernel/workqueue.c:3548
__unix_dgram_recvmsg+0x243/0xdd0 net/unix/af_unix.c:2442
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2531
sock_recvmsg_nosec net/socket.c:1018 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1040
sock_read_iter+0x2bb/0x3b0 net/socket.c:1110
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
exp_funnel_lock+0x344/0x3b0 kernel/rcu/tree_exp.h:325
kthread+0x3af/0x750 kernel/kthread.c:464
task:kworker/R-kmems state:I stack:29960 pid:1354 tgid:1354 ppid:2 task_flags:0x4208060 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
kthread+0x3af/0x750 kernel/kthread.c:464
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/R-kmems state:I stack:29960 pid:1354 tgid:1354 ppid:2 task_flags:0x4208060 flags:0x00004000
rescuer_thread+0x946/0xe20 kernel/workqueue.c:3548
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/R-kvub3 state:I stack:29960 pid:1350 tgid:1350 ppid:2 task_flags:0x4208060 flags:0x00004000
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/R-kvub3 state:I stack:29960 pid:1349 tgid:1349 ppid:2 task_flags:0x4208060 flags:0x00004000
Call Trace:
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
task:kworker/R-kvub3 state:I stack:29960 pid:1348 tgid:1348 ppid:2 task_flags:0x4208060 flags:0x00004000
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/R-kvub3 state:I stack:29960 pid:1349 tgid:1349 ppid:2 task_flags:0x4208060 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:kworker/R-kvub3 state:I stack:29960 pid:1350 tgid:1350 ppid:2 task_flags:0x4208060 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
pvr2_context_thread_func+0x631/0x970 drivers/media/usb/pvrusb2/pvrusb2-context.c:160
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
rescuer_thread+0x946/0xe20 kernel/workqueue.c:3548
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
__purge_vmap_area_lazy+0x853/0xc10 mm/vmalloc.c:2313
drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2338
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2338
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x113d/0x35d0 kernel/sched/core.c:6764