------------[ cut here ]------------
WARNING: CPU: 0 PID: 2395 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: 2395 Comm: kworker/u4:2 Not tainted 5.12.0-rc2-syzkaller-00570-g88fe49249c99 #0
Hardware name: linux,dummy-virt (DT)
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 : ffff00006a691360
x29: ffff00006a691360 x28: ffff00000c941e58 
x27: dfff800000000000 x26: ffff00006a67c540 
x25: 1fffe0000d4cf8b1 x24: 1fffe0000d4cf8aa 
x23: ffff00000c940d30 x22: 0000000000fe4c00 
x21: ffff00006a67c540 x20: ffff00000c940e58 
x19: ffff00000c941e58 x18: ffff00006a69eb48 
x17: 00000000000013e8 x16: 00000000000013ec 
x15: ffff8000197d1010 x14: 1fffe0000d4d2222 
x13: 0000000000000001 x12: 0000000000000033 
x11: 1fffe0000194a456 x10: 0000000000000007 
x9 : 1fffe0000194a45e x8 : ffff800017d24c00 
x7 : 00000000f1f1f1f1 x6 : dfff800000000000 
x5 : 7fffffffffffffff x4 : 000000097aed8a00 
x3 : 000000097bebd600 x2 : 000000097aed8a00 
x1 : 000000097bebd600 x0 : 0000000000000002 
Call trace:
 vkms_vblank_simulate+0x26c/0x2f4 drivers/gpu/drm/vkms/vkms_crtc.c:41
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x590/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x2d4/0x810 kernel/time/hrtimer.c:1645
 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
 __schedule+0x90/0x1ac0 kernel/sched/core.c:4965
 preempt_schedule_common+0xa4/0x2a0 kernel/sched/core.c:5235
 preempt_schedule+0x60/0x6c kernel/sched/core.c:5260
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0x118/0x180 kernel/locking/spinlock.c:191
 task_rq_unlock kernel/sched/sched.h:1298 [inline]
 sched_move_task+0xfc/0x3a0 kernel/sched/core.c:8639
 sched_autogroup_exit_task+0x10/0x20 kernel/sched/autogroup.c:132
 do_exit+0x910/0x2290 kernel/exit.c:836
 call_usermodehelper_exec_async+0x348/0x454 kernel/umh.c:123
 ret_from_fork+0x10/0x3c arch/arm64/kernel/entry.S:958