syzbot

WARNING: CPU: 0 PID: 3554 at drivers/gpu/drm/drm_vblank.c:1269 drm_wait_one_vblank+0x958/0x9d0 drivers/gpu/drm/drm_vblank.c:1269
Modules linked in:

CPU: 0 PID: 3554 Comm: syz-executor137 Not tainted 6.1.55-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:drm_wait_one_vblank+0x958/0x9d0 drivers/gpu/drm/drm_vblank.c:1269
Code: df 80 3c 08 00 74 08 4c 89 ff e8 e3 14 1a fd 49 8b 1f 48 c7 c7 80 19 4f 8b 4c 89 f6 48 89 da 8b 5c 24 0c 89 d9 e8 f8 ea 8a fc <0f> 0b 49 be 00 00 00 00 00 fc ff df e9 80 fb ff ff 44 89 e9 80 e1
RSP: 0018:ffffc90003b3fac0 EFLAGS: 00010246

RAX: 3eed908c05e9b200 RBX: 0000000000000000 RCX: ffff8880774a0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003b3fc00 R08: ffffffff81526ece R09: fffffbfff2092e4f
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000767f64
R13: 0000000000000aea R14: ffffffff8b5ff460 R15: ffff88801ff0c010
FS:  000055555613e380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000021296000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_fb_helper_ioctl+0x110/0x140 drivers/gpu/drm/drm_fb_helper.c:1267
 do_fb_ioctl+0x1d3/0x850 drivers/video/fbdev/core/fbmem.c:1190
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f92c2155e29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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:00007ffc1f3f5f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffc1f3f5f60 RCX: 00007f92c2155e29
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000140 R09: 0000000000000140
R10: 0000000000000140 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc1f3f6178 R14: 00007ffc1f3f5f80 R15: 00007ffc1f3f5f70
 </TASK>