------------[ cut here ]------------ WARNING: CPU: 1 PID: 10396 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x2be/0x320 drivers/gpu/drm/vkms/vkms_crtc.c:21 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 10396 Comm: syz-executor.5 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1f0/0x31e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:235 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540 RIP: 0010:vkms_vblank_simulate+0x2be/0x320 drivers/gpu/drm/vkms/vkms_crtc.c:21 Code: 00 00 00 48 c7 c6 7c 0b 1b 89 31 c0 e8 db d6 a6 ff b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 82 cd f5 fc <0f> 0b e9 eb fd ff ff 89 d9 80 e1 07 38 c1 0f 8c 5f fe ff ff 48 89 RSP: 0018:ffffc90000da8d70 EFLAGS: 00010046 RAX: ffffffff847ec4de RBX: 000000000004b26e RCX: ffff8880543fe040 RDX: 0000000000010001 RSI: 000000000004b26e RDI: 0000000000000001 RBP: ffff8880ae927658 R08: ffffffff847ec2c1 R09: fffffbfff131a9a6 R10: fffffbfff131a9a6 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff11015d24ec2 R14: 0000000000000000 R15: ffff8880a1ff8d38 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x47f/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0xd0 kernel/locking/spinlock.c:191 Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 f8 c7 4b 89 e8 8a a1 90 f9 48 83 3d 1a c8 28 01 00 74 2c 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 2c 99 2d f9 65 8b 05 11 fe de 77 RSP: 0018:ffffc900079efc10 EFLAGS: 00000282 RAX: 1ffffffff12978ff RBX: ffff8880a1ff8390 RCX: dffffc0000000000 RDX: ffffc900144e8000 RSI: 0000000000007c1b RDI: 0000000000000282 RBP: ffff8880a1ff8390 R08: ffffffff817a3370 R09: ffffed10143ff073 R10: ffffed10143ff073 R11: 0000000000000000 R12: ffff8880a1f0b150 R13: 0000000000000000 R14: 0000000000000282 R15: ffff8880a1f0b028 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] drm_vblank_get+0x16b/0x1d0 drivers/gpu/drm/drm_vblank.c:1157 drm_wait_vblank_ioctl+0x526/0x1780 drivers/gpu/drm/drm_vblank.c:1778 drm_ioctl_kernel+0x2f3/0x430 drivers/gpu/drm/drm_ioctl.c:787 drm_ioctl+0x52f/0x890 drivers/gpu/drm/drm_ioctl.c:887 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl fs/ioctl.c:753 [inline] __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:760 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cce9 Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff165868c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000000c200 RCX: 000000000045cce9 RDX: 0000000020000040 RSI: 00000000c018643a RDI: 0000000000000006 RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffd94509fcf R14: 00007ff1658699c0 R15: 000000000078bf0c Kernel Offset: disabled Rebooting in 86400 seconds..