------------[ cut here ]------------
WARNING: CPU: 0 PID: 14 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x120/0x130 drivers/gpu/drm/vkms/vkms_crtc.c:41
Modules linked in:
CPU: 0 PID: 14 Comm: rcu_preempt Not tainted 5.12.0-rc2-syzkaller-00338-gf78d76e72a46 #0
Hardware name: linux,dummy-virt (DT)
pstate: 20400089 (nzCv daIf +PAN -UAO -TCO BTYPE=--)
pc : vkms_vblank_simulate+0x120/0x130 drivers/gpu/drm/vkms/vkms_crtc.c:21
lr : hrtimer_forward_now include/linux/hrtimer.h:510 [inline]
lr : vkms_vblank_simulate+0x3c/0x130 drivers/gpu/drm/vkms/vkms_crtc.c:19
sp : ffff800010003e30
x29: ffff800010003e30 x28: ffff00007fbc2e00 
x27: ffff00007fbc2e40 x26: ffff80001096f860 
x25: 0000000000000000 x24: 0000000000000001 
x23: 0000000000000080 x22: 0000000755eb0a50 
x21: 0000000000fe4c00 x20: f2ff000003f5c628 
x19: f2ff000003f5d498 x18: 000000000000000e 
x17: 0000000000000001 x16: 0000000000000019 
x15: 000003198c117642 x14: 0000000000000149 
x13: 0000000000000001 x12: 0000000000000000 
x11: 0000000000000002 x10: 0000000000000149 
x9 : 00000000021a462e x8 : 00000007561e5000 
x7 : 7fffffffffffffff x6 : 00000007561e5000 
x5 : 00000007561e5000 x4 : f2ff000003f5d498 
x3 : 00000007571c9c00 x2 : 00000007561e5000 
x1 : 00000007571c9c00 x0 : 0000000000000003 
Call trace:
 vkms_vblank_simulate+0x120/0x130 drivers/gpu/drm/vkms/vkms_crtc.c:41
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x140/0x1e0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0xe8/0x290 kernel/time/hrtimer.c:1645
 timer_handler drivers/clocksource/arm_arch_timer.c:647 [inline]
 arch_timer_handler_phys+0x38/0x50 drivers/clocksource/arm_arch_timer.c:665
 handle_percpu_devid_irq+0x84/0x150 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+0x7c/0xe0 kernel/irq/irqdesc.c:689
 handle_domain_irq include/linux/irqdesc.h:176 [inline]
 gic_handle_irq+0x50/0xd0 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+0x14/0x50 kernel/locking/spinlock.c:199
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x2dc/0x794 kernel/sched/core.c:5075
 schedule+0x70/0x10c kernel/sched/core.c:5154
 schedule_timeout+0x80/0xf0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
 rcu_gp_kthread+0x4f4/0xabc kernel/rcu/tree.c:2178
 kthread+0x174/0x180 kernel/kthread.c:292
 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958