------------[ cut here ]------------ WARNING: CPU: 0 PID: 13 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: 13 Comm: rcu_preempt 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 r7:83cda720 r6:82a22498 r5:00000000 r4:83cdb390 [<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) r9:8351e000 r8:ddfc53e0 r7:ddfc5380 r6:82a22498 r5:00000000 r4:83cdb390 [<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) r10:8351fe10 r9:8351fe78 r8:8351fde0 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) r10:8351fe10 r9:8351fe78 r8:00000001 r7:00000000 r6:828ad498 r5:00000000 r4:828ad498 r3:00010001 [<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) r10:82b0a2b4 r9:8351e000 r8:e000200c r7:828ad4bc r6:e0002000 r5:8351fe78 r4:82a22c34 [<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205) Exception stack(0x8351fe78 to 0x8351fec0) fe60: 00000000 821137b8 fe80: 00000001 20000093 60000013 82b0a290 82b0a290 8351ff54 60000013 82b0a2b4 fea0: 82b0a2b4 8351fedc 8351fe70 8351fec8 8181dacc 81826b50 20000013 ffffffff r9:8351e000 r8:60000013 r7:8351feac r6:ffffffff r5:20000013 r4:81826b50 [<81826b10>] (_raw_spin_unlock_irqrestore) from [<802a78fc>] (prepare_to_swait_event+0xa8/0x160 kernel/sched/swait.c:120) r5:8351ff50 r4:00000000 [<802a7854>] (prepare_to_swait_event) from [<802f3e78>] (rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]) [<802a7854>] (prepare_to_swait_event) from [<802f3e78>] (rcu_gp_kthread+0x9d0/0x18c8 kernel/rcu/tree.c:2178) r10:00000001 r9:00000000 r8:82a06d00 r7:82b0a290 r6:00000000 r5:8351e000 r4:82b09fc0 r3:00000000 [<802f34a8>] (rcu_gp_kthread) from [<80271d20>] (kthread+0x184/0x1a4 kernel/kthread.c:292) r7:00000000 [<80271b9c>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158) Exception stack(0x8351ffb0 to 0x8351fff8) ffa0: 00000000 00000000 00000000 00000000 ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 ffe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271b9c r4:834aa380 Rebooting in 86400 seconds..