WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_wait_one_vblank+0x570/0x5b0 drivers/gpu/drm/drm_vblank.c:1320, CPU#1: syz.6.753/9156
Modules linked in:
CPU: 1 UID: 0 PID: 9156 Comm: syz.6.753 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:drm_wait_one_vblank+0x570/0x5b0 drivers/gpu/drm/drm_vblank.c:1320
Code: ff df 80 3c 08 00 74 08 4c 89 e7 e8 da 88 ea fc 4d 8b 2c 24 48 c7 c7 a0 97 d2 8b 4c 89 fe 4c 89 ea 44 89 f1 e8 31 08 46 fc 90 <0f> 0b 90 90 49 bd 00 00 00 00 00 fc ff df e9 a7 fc ff ff 44 89 f9
RSP: 0018:ffffc9001a957ac0 EFLAGS: 00010246
RAX: e56dd034136b9b00 RBX: 1ffff11004959001 RCX: 0000000000080000
RDX: ffffc9001e1ef000 RSI: 000000000001759e RDI: 000000000001759f
RBP: ffffc9001a957ba8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba32c R12: ffff888024994000
R13: ffffffff8be5a160 R14: 0000000000000000 R15: ffffffff8be74a20
FS:  00007f087977e6c0(0000) GS:ffff888125fc2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c96606000 CR3: 0000000077e66000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drm_client_modeset_wait_for_vblank+0xc5/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330
 drm_fb_helper_ioctl+0x6f/0xc0 drivers/gpu/drm/drm_fb_helper.c:1097
 do_fb_ioctl+0x45c/0x750 drivers/video/fbdev/core/fb_chrdev.c:155
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f087898f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f087977e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0878be5fa0 RCX: 00007f087898f6c9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000004
RBP: 00007f0878a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0878be6038 R14: 00007f0878be5fa0 R15: 00007fff176f19c8
 </TASK>