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WARNING: CPU: 0 PID: 12 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: 0 PID: 12 Comm: ksoftirqd/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 r7:84560720 r6:82a22498 r5:00000000 r4:84561390
[<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)
 r9:8351c000 r8:ddfc53e0 r7:ddfc5380 r6:82a22498 r5:00000000 r4:84561390
[<80307de8>] (__hrtimer_run_queues) from [<80308da0>] (hrtimer_interrupt+0x14c/0x2e0 kernel/time/hrtimer.c:1663)
 r10:ddfc54d8 r9:ddfc5498 r8:ddfc5458 r7:ddfc54a0 r6:ddfc54e0 r5:20000193
 r4:ddfc5380
[<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)
 r10:8351dcc0 r9:8351dd28 r8:8351dc90 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)
 r10:8351dcc0 r9:8351dd28 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010100
[<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)
 r10:00000001 r9:8351c000 r8:e000200c r7:828ad4bc r6:e0002000 r5:8351dd28
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x8351dd28 to 0x8351dd70)
dd20:                   00000000 821137b8 00000001 20000013 ddfcd180 ddfe3180
dd40: ddfe3180 8351de14 ddfe3820 8351de14 00000001 8351de4c 8351dd20 8351dd78
dd60: 8181dacc 802990fc 20000013 ffffffff
 r9:8351c000 r8:ddfe3820 r7:8351dd5c r6:ffffffff r5:20000013 r4:802990fc
[<80298aa0>] (load_balance) from [<8029a5c0>] (rebalance_domains kernel/sched/fair.c:10029 [inline])
[<80298aa0>] (load_balance) from [<8029a5c0>] (run_rebalance_domains+0x37c/0x55c kernel/sched/fair.c:10686)
 r10:00000000 r9:82a06d00 r8:00000000 r7:00f5f0f2 r6:0005d958 r5:ddfcd180
 r4:8340b300
[<8029a244>] (run_rebalance_domains) from [<802012fc>] (__do_softirq+0x204/0x7ac kernel/softirq.c:345)
 r10:00000020 r9:8351c000 r8:82a22498 r7:00000003 r6:00000007 r5:00000006
 r4:82a0409c
[<802010f8>] (__do_softirq) from [<8024e06c>] (run_ksoftirqd kernel/softirq.c:652 [inline])
[<802010f8>] (__do_softirq) from [<8024e06c>] (run_ksoftirqd+0x50/0x78 kernel/softirq.c:644)
 r10:00000001 r9:802797cc r8:82a3a818 r7:834aa340 r6:00000000 r5:00000000
 r4:8351c000
[<8024e01c>] (run_ksoftirqd) from [<80279970>] (smpboot_thread_fn+0x1d4/0x334 kernel/smpboot.c:165)
[<8027979c>] (smpboot_thread_fn) from [<80271d20>] (kthread+0x184/0x1a4 kernel/kthread.c:292)
 r10:834dfdc4 r9:834aa340 r8:8027979c r7:00000000 r6:8351c000 r5:834aa380
 r4:8348eb80
[<80271b9c>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158)
Exception stack(0x8351dfb0 to 0x8351dff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271b9c
 r4:834aa380
Rebooting in 86400 seconds..