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WARNING: CPU: 1 PID: 9369 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x150/0x154 drivers/gpu/drm/vkms/vkms_crtc.c:21
Modules linked in:
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9369 Comm: syz-executor.0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<81802550>] (dump_backtrace) from [<818027c4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60000193 r5:00000000 r4:82b58344
[<818027ac>] (show_stack) from [<81809e98>] (__dump_stack lib/dump_stack.c:79 [inline])
[<818027ac>] (show_stack) from [<81809e98>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120)
[<81809de0>] (dump_stack) from [<81803358>] (panic+0x130/0x378 kernel/panic.c:231)
 r7:81f48198 r6:82a390a4 r5:00000000 r4:82c6b0d0
[<81803228>] (panic) from [<802446f4>] (__warn+0xb0/0x164 kernel/panic.c:605)
 r3:82a2248c r2:00000000 r1:00000000 r0:81f48198
 r7:00000015
[<80244644>] (__warn) from [<81803608>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:628)
 r7:809fa964 r6:00000015 r5:81fcbd70 r4:00000000
[<818035a4>] (warn_slowpath_fmt) from [<809fa964>] (vkms_vblank_simulate+0x150/0x154 drivers/gpu/drm/vkms/vkms_crtc.c:21)
 r8:00fe4c00 r7:83494720 r6:82a22498 r5:00000000 r4:83495390
[<809fa814>] (vkms_vblank_simulate) from [<80307ebc>] (__run_hrtimer kernel/time/hrtimer.c:1537 [inline])
[<809fa814>] (vkms_vblank_simulate) from [<80307ebc>] (__hrtimer_run_queues+0xd4/0x690 kernel/time/hrtimer.c:1601)
 r9:86ccc000 r8:ddfdb3e0 r7:ddfdb380 r6:82a22498 r5:00000000 r4:83495390
[<80307de8>] (__hrtimer_run_queues) from [<80308da0>] (hrtimer_interrupt+0x14c/0x2e0 kernel/time/hrtimer.c:1663)
 r10:ddfdb4d8 r9:ddfdb498 r8:ddfdb458 r7:ddfdb4a0 r6:ddfdb4e0 r5:20000193
 r4:ddfdb380
[<80308c54>] (hrtimer_interrupt) from [<8114c308>] (timer_handler drivers/clocksource/arm_arch_timer.c:647 [inline])
[<80308c54>] (hrtimer_interrupt) from [<8114c308>] (arch_timer_handler_virt+0x30/0x38 drivers/clocksource/arm_arch_timer.c:658)
 r10:86ccdd70 r9:86ccddd8 r8:86ccdd40 r7:8348d940 r6:82a22c34 r5:0000001c
 r4:8348b000
[<8114c2d8>] (arch_timer_handler_virt) from [<802df904>] (handle_percpu_devid_irq+0xa4/0x19c kernel/irq/chip.c:930)
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline])
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq kernel/irq/irqdesc.c:652 [inline])
[<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (__handle_domain_irq+0xb0/0x120 kernel/irq/irqdesc.c:689)
 r10:86ccdd70 r9:86ccddd8 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010002
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (handle_domain_irq include/linux/irqdesc.h:176 [inline])
[<802d8680>] (__handle_domain_irq) from [<8088af70>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370)
 r10:853f8000 r9:86ccc000 r8:e000200c r7:828ad4bc r6:e0002000 r5:86ccddd8
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x86ccddd8 to 0x86ccde20)
ddc0:                                                       00000001 821137b8
dde0: 00000001 00000fd9 ddfe3180 00000000 86bc0000 82a22928 00000001 8181f7ec
de00: 853f8000 86ccde3c 86ccddd0 86ccde28 8181dacc 81826adc 20000013 ffffffff
 r9:86ccc000 r8:00000001 r7:86ccde0c r6:ffffffff r5:20000013 r4:81826adc
[<81826ab0>] (_raw_spin_unlock_irq) from [<8027f388>] (finish_lock_switch kernel/sched/core.c:4074 [inline])
[<81826ab0>] (_raw_spin_unlock_irq) from [<8027f388>] (finish_task_switch+0xac/0x258 kernel/sched/core.c:4191)
 r5:00000000 r4:ddfe3180
[<8027f2dc>] (finish_task_switch) from [<8181f7ec>] (context_switch kernel/sched/core.c:4325 [inline])
[<8027f2dc>] (finish_task_switch) from [<8181f7ec>] (__schedule+0x3e4/0xcc8 kernel/sched/core.c:5073)
 r10:83682660 r9:836839c0 r8:00000001 r7:ddfe3190 r6:853f8000 r5:86bc0000
 r4:ddfe3180
[<8181f408>] (__schedule) from [<8182077c>] (preempt_schedule_irq+0x54/0x88 kernel/sched/core.c:5530)
 r10:000000f0 r9:86ccc000 r8:80200ad4 r7:86ccdf34 r6:ffffffff r5:a0000013
 r4:86ccc000
[<81820728>] (preempt_schedule_irq) from [<80200afc>] (svc_preempt+0x8/0x18)
Exception stack(0x86ccdf00 to 0x86ccdf48)
df00: 00120128 00000081 000f4240 00000000 7ed45480 00000001 00000081 00120128
df20: 000f4240 86ccc000 000000f0 86ccdfa4 00000000 86ccdf50 80324710 80323868
df40: a0000013 ffffffff
 r5:a0000013 r4:80323868
[<80324608>] (sys_futex_time32) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x86ccdfa8 to 0x86ccdff0)
dfa0:                   00000000 00000000 00120128 00000081 000f4240 7ed45480
dfc0: 00000000 00000000 00000000 000000f0 0012012c 001d5eec 00000000 000f4240
dfe0: 7ed45368 7ed45358 0001f288 0004b950
 r8:80200224 r7:000000f0 r6:00000000 r5:00000000 r4:00000000
Rebooting in 86400 seconds..