------------[ cut here ]------------
WARNING: CPU: 0 PID: 7 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x26c/0x2f4 drivers/gpu/drm/vkms/vkms_crtc.c:41
Modules linked in:
CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: linux,dummy-virt (DT)
Workqueue:  0x0 (events_unbound)
pstate: 20000085 (nzCv daIf -PAN -UAO -TCO BTYPE=--)
pc : vkms_vblank_simulate+0x26c/0x2f4 drivers/gpu/drm/vkms/vkms_crtc.c:21
lr : hrtimer_forward_now include/linux/hrtimer.h:510 [inline]
lr : vkms_vblank_simulate+0x90/0x2f4 drivers/gpu/drm/vkms/vkms_crtc.c:19
sp : ffff00006ab34350
x29: ffff00006ab34350 x28: ffff00000e235e58 
x27: dfff800000000000 x26: ffff00006ab1f540 
x25: 1fffe0000d563eb1 x24: 1fffe0000d563eaa 
x23: ffff00000e234d30 x22: 0000000000fe4c00 
x21: ffff00006ab1f540 x20: ffff00000e234e58 
x19: ffff00000e235e58 x18: ffff00006ab18b48 
x17: 00000000000013e8 x16: 0000000000000007 
x15: ffff8000172a5010 x14: 1fffe0000d566820 
x13: 0000000000000001 x12: 0000000000000033 
x11: 1fffe0000113678e x10: 0000000000000007 
x9 : 1fffe00001136796 x8 : ffff800015e08c00 
x7 : 00000000f1f1f1f1 x6 : dfff800000000000 
x5 : 7fffffffffffffff x4 : 00000006fb589300 
x3 : 00000006fc56df00 x2 : 00000006fb589300 
x1 : 00000006fc56df00 x0 : 0000000000000002 
Call trace:
 vkms_vblank_simulate+0x26c/0x2f4 drivers/gpu/drm/vkms/vkms_crtc.c:41
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x590/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x2e0/0x910 kernel/time/hrtimer.c:1663
 timer_handler drivers/clocksource/arm_arch_timer.c:647 [inline]
 arch_timer_handler_phys+0x4c/0x70 drivers/clocksource/arm_arch_timer.c:665
 handle_percpu_devid_irq+0x19c/0x330 kernel/irq/chip.c:930
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 generic_handle_irq kernel/irq/irqdesc.c:652 [inline]
 __handle_domain_irq+0x11c/0x1f0 kernel/irq/irqdesc.c:689
 handle_domain_irq include/linux/irqdesc.h:176 [inline]
 gic_handle_irq+0x5c/0x1b0 drivers/irqchip/irq-gic.c:370
 el1_irq+0xb4/0x180 arch/arm64/kernel/entry.S:669
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:37 [inline]
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
 _raw_spin_unlock_irq+0x80/0x15c kernel/locking/spinlock.c:199
 finish_lock_switch kernel/sched/core.c:4074 [inline]
 finish_task_switch.isra.0+0x1b0/0x690 kernel/sched/core.c:4191
 context_switch kernel/sched/core.c:4325 [inline]
 __schedule+0x814/0x1ac0 kernel/sched/core.c:5073
 schedule+0xac/0x230 kernel/sched/core.c:5152
 worker_thread+0x4f4/0xcd0 kernel/workqueue.c:2442
 kthread+0x320/0x3bc kernel/kthread.c:292
 ret_from_fork+0x10/0x3c arch/arm64/kernel/entry.S:958