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WARNING: CPU: 1 PID: 0 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: 0 Comm: swapper/1 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 r7:83496720 r6:82a22498 r5:00000000 r4:83497390
[<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)
 r9:83522000 r8:ddfdb3e0 r7:ddfdb380 r6:82a22498 r5:00000000 r4:83497390
[<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)
 r10:83523eb0 r9:83523f18 r8:83523e80 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)
 r10:83523eb0 r9:83523f18 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010001
[<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)
 r10:00000000 r9:83522000 r8:e000200c r7:828ad4bc r6:e0002000 r5:83523f18
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x83523f18 to 0x83523f60)
3f00:                                                       00000001 81f5a420
3f20: 00000001 8021e080 83522000 00000001 82a22498 82a224d4 00000002 00000000
3f40: 00000000 83523f74 83523f58 83523f68 80209434 80209438 20000013 ffffffff
 r9:83522000 r8:00000002 r7:83523f4c r6:ffffffff r5:20000013 r4:80209438
[<802093f0>] (arch_cpu_idle) from [<81826618>] (default_idle_call+0x50/0x9c kernel/sched/idle.c:112)
[<818265c8>] (default_idle_call) from [<8028deb0>] (cpuidle_idle_call kernel/sched/idle.c:194 [inline])
[<818265c8>] (default_idle_call) from [<8028deb0>] (do_idle+0x26c/0x2f8 kernel/sched/idle.c:300)
[<8028dc44>] (do_idle) from [<8028e35c>] (cpu_startup_entry+0x20/0x24 kernel/sched/idle.c:397)
 r10:00000000 r9:412fc0f1 r8:80003010 r7:83523ff8 r6:82a32300 r5:82b242b0
 r4:00000091
[<8028e33c>] (cpu_startup_entry) from [<802118bc>] (secondary_start_kernel+0x1e0/0x2b0 arch/arm/kernel/smp.c:470)
[<802116dc>] (secondary_start_kernel) from [<80201950>] (__enable_mmu+0x0/0x10 arch/arm/kernel/head.S:399)
 r7:83523ff8 r6:30c0387d r5:00000000 r4:834aa300
Rebooting in 86400 seconds..