kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9484 Comm: kworker/1:3 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient fb_flashcursor
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x116/0x15d lib/dump_stack.c:120
 panic+0x1e7/0x5fa kernel/panic.c:231
 __warn+0x25a/0x260 kernel/panic.c:605
 report_bug+0x2a8/0x350 lib/bug.c:198
 handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x18/0xb0 arch/x86/kernel/traps.c:259
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:578
RIP: 0010:vkms_vblank_simulate+0x209/0x210 drivers/gpu/drm/vkms/vkms_crtc.c:21
Code: 00 00 00 48 c7 c6 fe f0 6f 86 31 c0 e8 e0 54 f7 ff b8 01 00 00 00 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 57 0a 65 fe <0f> 0b e9 5d fe ff ff 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 48
RSP: 0018:ffffc90000d18e28 EFLAGS: 00010046
RAX: ffffffff82e0abd9 RBX: 0000000000000002 RCX: ffff888020f92000
RDX: 0000000000010000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff88813bd1dec0 R08: ffffffff82e0aa2e R09: 00018881014434af
R10: 0001ffffffffffff R11: 00000000fffffffe R12: ffffffff82e0a9d0
R13: ffff88813bd1ded0 R14: ffff888101442638 R15: 0000000000fe4c00
 __run_hrtimer+0x133/0x420 kernel/time/hrtimer.c:1519
 __hrtimer_run_queues kernel/time/hrtimer.c:1583 [inline]
 hrtimer_interrupt+0x36e/0xa10 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x6f/0x200 arch/x86/kernel/apic/apic.c:1102
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:console_unlock+0xb43/0xc30 kernel/printk/printk.c:2583
Code: df 31 d2 e8 0f 64 00 00 89 c3 48 c7 c7 14 f0 2b 88 e8 61 14 3d 04 e8 1c 43 00 00 48 8b 44 24 10 48 89 44 24 60 ff 74 24 60 9d <84> db 0f 84 99 00 00 00 e8 60 0a 00 00 85 c0 0f 84 93 00 00 00 e8
RSP: 0018:ffffc90003bbfbf0 EFLAGS: 00000293
RAX: 0000000000000293 RBX: 0000000000000000 RCX: ffff888020f92000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff882bf014
RBP: ffffc90003bbfd50 R08: 0000000000000000 R09: 0001ffff86a656ff
R10: 0000000000000002 R11: ffff888020f92000 R12: 0000000000000000
R13: ffff8881013e7000 R14: ffff888100153c00 R15: ffffc90003bbfce0
 fb_flashcursor+0x111/0x5d0 drivers/video/fbdev/core/fbcon.c:385
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Kernel Offset: disabled
Rebooting in 86400 seconds..