------------[ cut here ]------------ WARNING: CPU: 1 PID: 7837 at drivers/gpu/drm/vkms/vkms_crtc.c:27 vkms_vblank_simulate.cold+0x1a/0x30 drivers/gpu/drm/vkms/vkms_crtc.c:24 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7837 Comm: syz-executor.2 Not tainted 5.7.0-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+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:vkms_vblank_simulate.cold+0x1a/0x30 drivers/gpu/drm/vkms/vkms_crtc.c:27 Code: fd 48 8d bb 50 0b 00 00 e8 43 3e 4a fd 5b 5d c3 e8 cb 19 5a fd 4c 89 e1 4c 89 fa 4c 89 ee 48 c7 c7 60 67 46 88 e8 0a 04 43 fd <0f> 0b e9 07 ee ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 0018:ffff8880aeb09dc0 EFLAGS: 00010086 RAX: 000000000000002f RBX: ffff888218d0d830 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815eeb16 RDI: ffffed1015d613aa RBP: ffff8880aeb09df0 R08: 000000000000002f R09: ffffed1015d666a9 R10: ffff8880aeb33547 R11: ffffed1015d666a8 R12: 00000000010dfabf R13: 00000014309da4f3 R14: ffff888218d0cce0 R15: 0000000000000000 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x20f/0xf70 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 a0 c3 34 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d b7 c0 a8 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 d1 6c c4 f9 65 8b 05 c2 1b 76 78 RSP: 0018:ffff888084c5fab0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1269874 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000286 RBP: ffff888084c5fac0 R08: ffff8880a0240180 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888218d0c338 R13: 0000000000000000 R14: ffff888218d0c338 R15: ffff888218cb5928 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] drm_vblank_get+0x153/0x1e0 drivers/gpu/drm/drm_vblank.c:1101 drm_wait_vblank_ioctl+0x41a/0x1940 drivers/gpu/drm/drm_vblank.c:1722 drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:787 drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:887 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x123/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:778 do_syscall_64+0xfa/0x7e0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45a649 Code: ad 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8a1edf6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a649 RDX: 0000000020000100 RSI: 00000000c018643a RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8a1edf76d4 R13: 00000000004c2a1e R14: 00000000004d6af8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..