vkms_vblank_simulate: vblank timer overrun
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=468c/1/0x4000000000000000 softirq=66758/66764 fqs=3
rcu: (detected by 1, t=10502 jiffies, g=59729, q=151 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 970 Comm: kworker/0:2 Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:87 [inline]
RIP: 0010:do_raw_spin_lock+0xae/0x2c0 kernel/locking/spinlock_debug.c:115
Code: 01 00 00 8b 43 04 3d ad 4e ad de 0f 85 81 01 00 00 4c 8d 6b 10 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 c5 01 00 00 48 8b 53 10 65 48 8b 05 e0 bf 6c 7e 48 39 c2 0f
RSP: 0018:ffffc90000007c48 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff9aa5bf58 RCX: ffffffff8195b34e
RDX: 1ffffffff354b7ed RSI: ffffffff8b6cf020 RDI: ffffffff9aa5bf5c
RBP: 1ffff92000000f8a R08: 0000000000000000 R09: fffffbfff2dd7b98
R10: ffffffff96ebdcc7 R11: 0000000000000006 R12: dffffc0000000000
R13: ffffffff9aa5bf68 R14: 1ffff92000000fa4 R15: ffffffff9aa5bf50
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffba409e440 CR3: 00000000252f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0x42/0x60 kernel/locking/spinlock.c:162
debug_object_activate+0x149/0x4a0 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
debug_activate kernel/time/hrtimer.c:496 [inline]
enqueue_hrtimer+0x25/0x3c0 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1818 [inline]
__hrtimer_run_queues+0x903/0xae0 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5251
Code: a9 0a 00 00 44 8b 0d 73 c5 d9 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 59 e5 38 00 fb 65 48 8b 1d 60 35 7b 7e <48> 8d bb 08 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90003c1e720 EFLAGS: 00000202
RAX: 00000000002a5397 RBX: ffff8880267fc880 RCX: 1ffffffff2dde203
RDX: 0000000000000000 RSI: ffffffff8b6ced20 RDI: ffffffff8bd34e00
RBP: ffffc90003c1e768 R08: 0000000000000001 R09: fffffbfff2dd7ba8
R10: ffffffff96ebdd47 R11: 0000000000000005 R12: ffff8880b863fa30
R13: ffff88802e91c880 R14: 0000000000000000 R15: ffff8880b863ec00
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0xf4b/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
call_usermodehelper_exec+0x3c4/0x4d0 kernel/umh.c:441
call_modprobe kernel/module/kmod.c:102 [inline]
__request_module+0x3f6/0x6c0 kernel/module/kmod.c:172
rc_map_get+0x126/0x280 drivers/media/rc/rc-main.c:114
rc_prepare_rx_device drivers/media/rc/rc-main.c:1793 [inline]
rc_register_device+0x394/0x1be0 drivers/media/rc/rc-main.c:1927
mceusb_init_rc_dev drivers/media/rc/mceusb.c:1638 [inline]
mceusb_dev_probe+0x15b8/0x38a0 drivers/media/rc/mceusb.c:1766
usb_probe_interface+0x300/0x9c0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:658
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:958
bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x114b/0x1a70 drivers/base/core.c:3665
usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:658
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:958
bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x114b/0x1a70 drivers/base/core.c:3665
usb_new_device+0xd09/0x1a20 drivers/usb/core/hub.c:2652
hub_port_connect drivers/usb/core/hub.c:5523 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
port_event drivers/usb/core/hub.c:5823 [inline]
hub_event+0x2d9a/0x4e10 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
rcu: rcu_preempt kthread starved for 10485 jiffies! g59729 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27328 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__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
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
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
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 16111 Comm: syz.3.2393 Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e3/0x12c0 kernel/smp.c:885
Code: 49 01 c4 83 c5 03 e8 fc 04 0c 00 f3 90 41 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 e8 0b 00 00 8b 43 08 31 ff 83 e0 01 41 89 c5 <89> c6 e8 d6 ff 0b 00 45 85 ed 75 d0 e8 cc 04 0c 00 e8 c7 04 0c 00
RSP: 0018:ffffc9000c32fac8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b8646a00 RCX: ffffc9000d71a000
RDX: 0000000000080000 RSI: ffffffff81adcee4 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000004 R12: ffffed10170c8d41
R13: 0000000000000001 R14: ffff8880b873fe80 R15: ffff8880b8646a08
FS: 00007fad37fd56c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad37fd4f98 CR3: 00000000252f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2118 [inline]
text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2328
text_poke_flush arch/x86/kernel/alternative.c:2519 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2516 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2526
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:920
static_key_slow_inc_cpuslocked kernel/jump_label.c:168 [inline]
static_key_slow_inc_cpuslocked+0x82/0x120 kernel/jump_label.c:151
static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191
io_uring_create io_uring/io_uring.c:3625 [inline]
io_uring_setup+0x1970/0x2200 io_uring/io_uring.c:3791
__do_sys_io_uring_setup io_uring/io_uring.c:3818 [inline]
__se_sys_io_uring_setup io_uring/io_uring.c:3812 [inline]
__x64_sys_io_uring_setup+0x98/0x140 io_uring/io_uring.c:3812
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: 0033:0x7fad3a18cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad37fd4fc8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007fad3a3a6080 RCX: 00007fad3a18cde9
RDX: 0000400000000980 RSI: 00004000000008c0 RDI: 000000000000072c
RBP: 00004000000008c0 R08: 0000000000000000 R09: 0000400000000980
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000400000000940 R14: 000000000000072c R15: 0000400000000980