WARNING: CPU: 0 PID: 17234 at drivers/gpu/drm/drm_vblank.c:1308 drm_wait_one_vblank+0x2f6/0x5b0 drivers/gpu/drm/drm_vblank.c:1308
Modules linked in:
CPU: 0 UID: 0 PID: 17234 Comm: syz.6.2717 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+0x2f6/0x5b0 drivers/gpu/drm/drm_vblank.c:1308
Code: ed 0f 84 12 02 00 00 e8 f8 65 72 fc 48 89 ef e8 80 3e 90 00 44 89 e1 4c 89 ea 48 c7 c7 40 04 08 8c 48 89 c6 e8 8b 95 30 fc 90 <0f> 0b 90 90 e9 4e fe ff ff e8 cc 65 72 fc 48 89 ef e8 94 5e 18 06
RSP: 0018:ffffc90004fcfb10 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88814279e000 RCX: ffffc900142c3000
RDX: 0000000000080000 RSI: ffffffff817b3ef5 RDI: 0000000000000001
RBP: ffff8880256ab000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8c1cf0a0 R14: 1ffff920009f9f65 R15: 000000000000dd26
FS:  00007fcdd2ff66c0(0000) GS:ffff888124a08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d7fbff8 CR3: 00000000284fd000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000c0e
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_fb_helper_ioctl+0x156/0x1a0 drivers/gpu/drm/drm_fb_helper.c:1108
 do_fb_ioctl+0x3d5/0x7e0 drivers/video/fbdev/core/fb_chrdev.c:155
 fb_ioctl+0xe5/0x150 drivers/video/fbdev/core/fb_chrdev.c:169
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcdd4d8efc9
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:00007fcdd2ff6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcdd4fe6180 RCX: 00007fcdd4d8efc9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 000000000000000c
RBP: 00007fcdd4e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcdd4fe6218 R14: 00007fcdd4fe6180 R15: 00007ffc6546e608
 </TASK>