------------[ cut here ]------------ WARNING: CPU: 0 PID: 8906 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Modules linked in: CPU: 0 PID: 8906 Comm: syz-executor121 Not tainted 5.11.0-rc6-next-20210204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 40 3e d6 89 e8 0c af ef ff e9 e5 fe ff ff e8 32 9d 28 fd <0f> 0b e9 88 fd ff ff e8 26 4b 6c fd e9 11 fe ff ff 4c 89 ef e8 19 RSP: 0018:ffffc90000007de8 EFLAGS: 00010046 RAX: 0000000080010001 RBX: ffff888018755e58 RCX: 0000000000000000 RDX: ffff888026868000 RSI: ffffffff844a4d8e RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff844a4b13 R11: 0000000000000000 R12: ffff888018754d30 R13: 0000000000fe4c00 R14: ffff8880b9c26340 R15: ffffffff844a4a70 FS: 00000000004ec300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004b20f0 CR3: 00000000267de000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:console_unlock+0x7b6/0xbb0 kernel/printk/printk.c:2580 Code: 40 e4 e7 8b e8 cb 97 fd ff e8 c6 3d 00 00 31 ff 4c 89 ee e8 dc e3 17 00 4d 85 ed 0f 85 3a 02 00 00 e8 de db 17 00 ff 34 24 9d <8b> 5c 24 34 31 ff 89 de e8 4d e3 17 00 85 db 0f 84 eb f9 ff ff e8 RSP: 0018:ffffc900027b7738 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888026868000 RSI: ffffffff815b0ee2 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8faa5827 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff84af9530 R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc900027b7798 vprintk_emit+0x189/0x490 kernel/printk/printk.c:2092 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2140 set_target_expiration.cold+0xf0/0x160 arch/x86/kvm/lapic.c:1742 __start_apic_timer arch/x86/kvm/lapic.c:1945 [inline] kvm_apic_set_state+0x96f/0xcb0 arch/x86/kvm/lapic.c:2600 kvm_vcpu_ioctl_set_lapic arch/x86/kvm/x86.c:4084 [inline] kvm_arch_vcpu_ioctl+0xc27/0x2d30 arch/x86/kvm/x86.c:4723 kvm_vcpu_ioctl+0x7b9/0xd90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3435 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x444239 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc4dd6e828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000000122f1 RCX: 0000000000444239 RDX: 0000000020000580 RSI: 000000004400ae8f RDI: 0000000000000006 RBP: 0000000000000000 R08: 00007ffc4dd6e9c8 R09: 00007ffc4dd6e9c8 R10: 00007ffc4dd6e9c8 R11: 0000000000000246 R12: 00007ffc4dd6e83c R13: 431bde82d7b634db R14: 00000000004b2018 R15: 00000000004004a0