------------[ cut here ]------------ WARNING: CPU: 1 PID: 10132 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: 1 PID: 10132 Comm: syz-executor.0 Not tainted 5.11.0-rc4-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 39 b5 89 e8 3c f4 ef ff e9 e5 fe ff ff e8 32 1f 2d fd <0f> 0b e9 88 fd ff ff e8 26 9e 6f fd e9 11 fe ff ff 4c 89 ef e8 19 RSP: 0018:ffffc90000dc8de8 EFLAGS: 00010046 RAX: 0000000000010001 RBX: ffff88801a461e48 RCX: 0000000000000000 RDX: ffff88801d04a2c0 RSI: ffffffff8445ad9e RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8445ab23 R11: 0000000000000000 R12: ffff88801a460d40 R13: 0000000000fe4c00 R14: ffff8880b9f26a00 R15: ffffffff8445aa80 FS: 00007f2470b7f700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000778000 CR3: 000000001c19f000 CR4: 00000000001506e0 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:628 RIP: 0010:console_unlock+0x7b6/0xbb0 kernel/printk/printk.c:2580 Code: e0 27 28 8b e8 eb 97 fd ff e8 c6 3d 00 00 31 ff 4c 89 ee e8 6c a5 17 00 4d 85 ed 0f 85 3a 02 00 00 e8 ce 9e 17 00 ff 34 24 9d <8b> 5c 24 34 31 ff 89 de e8 dd a4 17 00 85 db 0f 84 eb f9 ff ff e8 RSP: 0018:ffffc9000b1f7750 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801d04a2c0 RSI: ffffffff815b2e02 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8ed407a7 R10: fffffbfff1da80f4 R11: 0000000000000000 R12: ffffffff84aa8970 R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc9000b1f77b0 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 __ext4_msg.cold+0x52/0x57 fs/ext4/super.c:906 ext4_fill_super+0xd41/0xde80 fs/ext4/super.c:4111 mount_bdev+0x34d/0x410 fs/super.c:1366 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1496 do_new_mount fs/namespace.c:2881 [inline] path_mount+0x13ad/0x20c0 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460c6a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f2470b7ea78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2470b7eb10 RCX: 0000000000460c6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2470b7ead0 RBP: 00007f2470b7ead0 R08: 00007f2470b7eb10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020000380