WARNING: CPU: 1 PID: 4696 at drivers/gpu/drm/drm_vblank.c:1269 drm_wait_one_vblank+0x8c8/0x940 drivers/gpu/drm/drm_vblank.c:1269
Modules linked in:

CPU: 1 PID: 4696 Comm: syz-executor.5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:drm_wait_one_vblank+0x8c8/0x940 drivers/gpu/drm/drm_vblank.c:1269
Code: 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 3f ad 49 fd 4d 8b 27 48 c7 c7 c0 9d 8d 8a 4c 89 f6 4c 89 e2 89 d9 e8 b8 b2 40 05 <0f> 0b 4c 8b 64 24 08 e9 fb fb ff ff 44 89 f1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90002fcfaa0 EFLAGS: 00010246
RAX: 655ff69c82efc000 RBX: 0000000000000000 RCX: ffff888079b5bb80
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002fcfbe0 R08: ffff8880b9133d7f R09: 1ffff110172267af
R10: dffffc0000000000 R11: ffffed10172267b0 R12: ffff88814634aac8
R13: dffffc0000000000 R14: ffffffff8a9c7260 R15: ffff88801dfe6010
FS:  00007f8b38ab66c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6a2af7e7d0 CR3: 000000006a613000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_fb_helper_ioctl+0x112/0x140 drivers/gpu/drm/drm_fb_helper.c:1196
 do_fb_ioctl+0x281/0x850 drivers/video/fbdev/core/fbmem.c:1192
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8b39724fb9
Code: 48 83 c8 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 73 01 c3 48 c7 c1 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8b38ab60b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8b39863f80 RCX: 00007f8b39724fb9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000003
RBP: 00007f8b3979ab38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8b39863f80 R15: 00007fff2714c4b8
 </TASK>