WARNING: CPU: 1 PID: 8928 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x25c/0x2c0 drivers/gpu/drm/vkms/vkms_crtc.c:40 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8928 Comm: syz-executor016 Not tainted 5.2.0-rc3 #10 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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x744 kernel/panic.c:219 __warn.cold+0x20/0x4d kernel/panic.c:576 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986 RIP: 0010:vkms_vblank_simulate+0x25c/0x2c0 drivers/gpu/drm/vkms/vkms_crtc.c:40 Code: c7 c7 40 2c c0 87 e8 33 08 ba ff e9 32 fe ff ff e8 39 0f 93 fd 48 8b 45 d0 49 89 86 40 02 00 00 e9 7a ff ff ff e8 24 0f 93 fd <0f> 0b e9 f4 fe ff ff e8 e8 ac cb fd e9 3a fe ff ff e8 3e ad cb fd RSP: 0018:ffff8880ae909dd8 EFLAGS: 00010006 RAX: ffff88808b22c700 RBX: ffff8880ae926d80 RCX: ffffffff83dd967d RDX: 0000000000010000 RSI: ffffffff83dd978c RDI: 0000000000000007 RBP: ffff8880ae909e08 R08: ffff88808b22c700 R09: 0000000000000002 R10: fffffbfff14c2b64 R11: ffff88808b22c700 R12: 0000000000093d7d R13: ffff888219195890 R14: 0000000000000000 R15: ffff888219194d88 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33b/0xdd0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 f0 73 b2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 62 d0 95 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 7c d8 30 fa 65 8b 05 dd 59 e5 78 RSP: 0018:ffff88808783fb10 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1164e7e RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000286 RBP: ffff88808783fb20 R08: ffff88808b22c700 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882191944b0 R13: 0000000000000000 R14: ffff8882191944b0 R15: ffff8880a42d7b88 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] drm_vblank_get+0x150/0x1e0 drivers/gpu/drm/drm_vblank.c:1006 drm_wait_vblank_ioctl+0x513/0x1950 drivers/gpu/drm/drm_vblank.c:1627 drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:776 compat_drm_wait_vblank+0xd6/0x190 drivers/gpu/drm/drm_ioc32.c:850 drm_compat_ioctl+0x1eb/0x310 drivers/gpu/drm/drm_ioc32.c:988 __do_compat_sys_ioctl fs/compat_ioctl.c:1052 [inline] __se_compat_sys_ioctl fs/compat_ioctl.c:998 [inline] __ia32_compat_sys_ioctl+0x195/0x620 fs/compat_ioctl.c:998 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xd7d arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f12849 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ffe2597c EFLAGS: 00000213 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c02c563a RDX: 0000000020000040 RSI: 00000000080ef078 RDI: 00000000ffe259d0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..