------------[ cut here ]------------
WARNING: CPU: 0 PID: 3290 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: 3290 Comm: kworker/u4:0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
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 r7:840a6720 r6:82a22498 r5:00000000 r4:840a7390
[<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)
 r9:86866000 r8:ddfc53e0 r7:ddfc5380 r6:82a22498 r5:00000000 r4:840a7390
[<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)
 r10:86867d40 r9:86867da8 r8:86867d10 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)
 r10:86867d40 r9:86867da8 r8:00000001 r7:00000000 r6:828ad498 r5:00000000
 r4:828ad498 r3:00010002
[<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)
 r10:854b0000 r9:86866000 r8:e000200c r7:828ad4bc r6:e0002000 r5:86867da8
 r4:82a22c34
[<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x86867da8 to 0x86867df0)
7da0:                   00000000 5b71e000 828a2680 60000093 854b06e8 00000003
7dc0: 82b09c84 828a2680 00000000 60000013 854b0000 86867e24 86867de8 86867df8
7de0: 8181dacc 8181c9d0 20000013 ffffffff
 r9:86866000 r8:00000000 r7:86867ddc r6:ffffffff r5:20000013 r4:8181c9d0
[<8181c880>] (lock_is_held_type) from [<802e7e14>] (lock_is_held include/linux/lockdep.h:278 [inline])
[<8181c880>] (lock_is_held_type) from [<802e7e14>] (rcu_read_lock_sched_held+0x44/0x7c kernel/rcu/update.c:125)
 r10:00000a6a r9:833beef8 r8:80bd0070 r7:82a22498 r6:80bd02ec r5:82b853b4
 r4:82bfd3d6 r3:86866000
[<802e7dd0>] (rcu_read_lock_sched_held) from [<802bfa2c>] (trace_lock_release include/trace/events/lock.h:58 [inline])
[<802e7dd0>] (rcu_read_lock_sched_held) from [<802bfa2c>] (lock_release+0x4c0/0x534 kernel/locking/lockdep.c:5521)
[<802bf56c>] (lock_release) from [<81826a3c>] (__raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline])
[<802bf56c>] (lock_release) from [<81826a3c>] (_raw_spin_unlock+0x1c/0x58 kernel/locking/spinlock.c:183)
 r10:00000a6a r9:833beef8 r8:80bd0070 r7:00000000 r6:3b9aca00 r5:00000097
 r4:82b853a4
[<81826a20>] (_raw_spin_unlock) from [<80bd02ec>] (spin_unlock include/linux/spinlock.h:394 [inline])
[<81826a20>] (_raw_spin_unlock) from [<80bd02ec>] (wg_ratelimiter_gc_entries+0x23c/0x2ec drivers/net/wireguard/ratelimiter.c:76)
 r5:00000097 r4:c975c400
[<80bd00b0>] (wg_ratelimiter_gc_entries) from [<80269484>] (process_one_work+0x2d4/0x998 kernel/workqueue.c:2275)
 r10:00000088 r9:82a22498 r8:82bfd34e r7:83416200 r6:83420000 r5:86857a80
 r4:82b853c8
[<802691b0>] (process_one_work) from [<80269bac>] (worker_thread+0x64/0x54c kernel/workqueue.c:2421)
 r10:00000088 r9:86866000 r8:82a06d00 r7:83420038 r6:86857a94 r5:83420000
 r4:86857a80
[<80269b48>] (worker_thread) from [<80271d20>] (kthread+0x184/0x1a4 kernel/kthread.c:292)
 r10:8366be64 r9:86857a80 r8:80269b48 r7:00000000 r6:86866000 r5:864df500
 r4:86677200
[<80271b9c>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158)
Exception stack(0x86867fb0 to 0x86867ff8)
7fa0:                                     00000000 00000000 00000000 00000000
7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271b9c
 r4:864df500
Rebooting in 86400 seconds..