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WARNING: CPU: 0 PID: 21287 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: 21287 Comm: syz-executor.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 r7:844b8720 r6:82a22498 r5:00000000 r4:844b9390
[<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)
 r9:86d8a000 r8:ddfc53e0 r7:ddfc5380 r6:82a22498 r5:00000000 r4:844b9390
[<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)
 r10:86d8bd58 r9:86d8bdc0 r8:86d8bd28 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)
 r10:86d8bd58 r9:86d8bdc0 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010000
[<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)
 r10:82a410e4 r9:86d8a000 r8:e000200c r7:828ad4bc r6:e0002000 r5:86d8bdc0
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x86d8bdc0 to 0x86d8be08)
bdc0: 00000000 821137b8 00000001 00000061 0000058e 00000000 00000000 86d8be48
bde0: 82a410e0 00000001 82a410e4 86d8bed4 86d8bdb8 86d8be10 8181dacc 802d34e8
be00: 20000013 ffffffff
 r9:86d8a000 r8:82a410e0 r7:86d8bdf4 r6:ffffffff r5:20000013 r4:802d34e8
[<802d31f0>] (syslog_print_all) from [<802d3790>] (do_syslog.part.0+0x220/0x428 kernel/printk/printk.c:1602)
 r10:00000067 r9:86d8a000 r8:00000000 r7:00000067 r6:20000240 r5:20000240
 r4:00000086
[<802d3570>] (do_syslog.part.0) from [<802d4fdc>] (do_syslog kernel/printk/printk.c:1569 [inline])
[<802d3570>] (do_syslog.part.0) from [<802d4fdc>] (__do_sys_syslog kernel/printk/printk.c:1680 [inline])
[<802d3570>] (do_syslog.part.0) from [<802d4fdc>] (sys_syslog+0x3c/0x40 kernel/printk/printk.c:1678)
 r10:00000067 r9:86d8a000 r8:80200224 r7:00000067 r6:00000086 r5:20000240
 r4:00000003
[<802d4fa0>] (sys_syslog) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x86d8bfa8 to 0x86d8bff0)
bfa0:                   00000000 00000000 00000003 20000240 00000086 00000000
bfc0: 00000000 00000000 00000000 00000067 7ebe331a 76f5f6d0 7ebe34a4 76f5f20c
bfe0: 76f5f048 76f5f038 00018df4 0004b950
 r7:00000067 r6:00000000 r5:00000000 r4:00000000
Rebooting in 86400 seconds..