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WARNING: CPU: 0 PID: 8386 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x2c1/0x320 drivers/gpu/drm/vkms/vkms_crtc.c:21
Modules linked in:
CPU: 0 PID: 8386 Comm: syz-executor343 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vkms_vblank_simulate+0x2c1/0x320 drivers/gpu/drm/vkms/vkms_crtc.c:21
Code: 00 00 00 48 c7 c6 80 78 2b 8a 31 c0 e8 68 7b ef ff b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 8f 7a 0c fd <0f> 0b e9 e8 fd ff ff 89 d9 80 e1 07 38 c1 0f 8c 5c fe ff ff 48 89
RSP: 0018:ffffc90000007d58 EFLAGS: 00010046
RAX: ffffffff846c9e41 RBX: 0000000000000002 RCX: ffff888015269c40
RDX: 0000000000010000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff8880b9c26260 R08: ffffffff846c9c21 R09: fffffbfff1b6983e
R10: fffffbfff1b6983e R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff110030c2bd2 R14: 0000000000fe4c00 R15: ffff888018614d30
FS:  00007f1368e85700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6711ca008 CR3: 000000001260b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x4c9/0xa00 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:console_unlock+0xaab/0xe00 kernel/printk/printk.c:2586
Code: 84 5a f7 ff ff eb 29 e8 c3 66 18 00 e8 ae 72 f1 07 4d 85 f6 74 df 66 0f 1f 84 00 00 00 00 00 e8 ab 66 18 00 fb f6 44 24 0f 01 <0f> 84 2f f7 ff ff e8 9a 66 18 00 48 c7 c7 24 8f 70 8b be 1b 0a 00
RSP: 0018:ffffc9000169fce0 EFLAGS: 00000202
RAX: ffffffff8160b225 RBX: 0000000000000000 RCX: ffff888015269c40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000169fdf8 R08: ffffffff8160b1e2 R09: fffffbfff1f270b1
R10: fffffbfff1f270b1 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffffffff19f2111 R14: 0000000000000200 R15: 1ffffffff19f210a
 do_fb_ioctl+0x5ec/0x6e0 drivers/video/fbdev/core/fbmem.c:1112
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4459e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1368e85318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004ca408 RCX: 00000000004459e9
RDX: 0000000020000040 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 00000000004ca400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 3162662f7665642f
R13: 00007fff9aad4cef R14: 00007f1368e85400 R15: 0000000000022000