WARNING: CPU: 1 PID: 4955 at drivers/gpu/drm/drm_vblank.c:1269 drm_wait_one_vblank+0x91d/0x990 drivers/gpu/drm/drm_vblank.c:-1
Modules linked in:
CPU: 1 PID: 4955 Comm: syz.4.92 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:drm_wait_one_vblank+0x91d/0x990 drivers/gpu/drm/drm_vblank.c:1269
Code: 3c 08 00 74 08 48 89 df e8 60 01 42 fd 4c 8b 3b 48 c7 c7 60 a5 f1 8a 4c 89 f6 4c 89 fa 8b 5c 24 0c 89 d9 e8 d5 fa bd fc 89 de <0f> 0b 49 bf 00 00 00 00 00 fc ff df e9 9c fb ff ff 89 d9 80 e1 07
RSP: 0018:ffffc90002fb7aa0 EFLAGS: 00010246
RAX: 4dabd5f201c0d300 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000dd11000 RSI: 0000000000000000 RDI: 00000000000236e1
RBP: ffffc90002fb7be0 R08: dffffc0000000000 R09: fffffbfff215c453
R10: fffffbfff215c453 R11: 1ffffffff215c452 R12: 0000000000000000
R13: 1ffff920005f6f60 R14: ffffffff8b02c980 R15: ffff888141bd5d48
FS:  00007f39bca9c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e812fc3950 CR3: 000000005d3b1000 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:1267
 do_fb_ioctl+0x1d3/0x720 drivers/video/fbdev/core/fbmem.c:1192
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f39bbb8efc9
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:00007f39bca9c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f39bbde5fa0 RCX: 00007f39bbb8efc9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000004
RBP: 00007f39bbc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39bbde6038 R14: 00007f39bbde5fa0 R15: 00007fff1a567828
 </TASK>