syzbot

R13: 00007f7755215fac R14: 00007f7755215fa0 R15: 00007f7755215fa0
 </TASK>
------------[ cut here ]------------
debug_locks && !(lock_is_held(&(&(obj)->lock.base)->dep_map) != 0)
WARNING: drivers/dma-buf/dma-resv.c:296 at dma_resv_add_fence+0x71e/0x840 drivers/dma-buf/dma-resv.c:296, CPU#2: syz.0.17/5919
Modules linked in:
CPU: 2 UID: 0 PID: 5919 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dma_resv_add_fence+0x71e/0x840 drivers/dma-buf/dma-resv.c:296
Code: 44 24 08 be ff ff ff ff 48 8d 78 60 e8 db 3b 33 05 31 ff 89 c3 89 c6 e8 e0 58 b1 fb 85 db 0f 85 26 fa ff ff e8 23 5e b1 fb 90 <0f> 0b 90 e9 18 fa ff ff e8 15 5e b1 fb be 03 00 00 00 4c 89 e7 e8
RSP: 0018:ffffc9000448f168 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff865734f0
RDX: ffff8880261ea500 RSI: ffffffff865734fd RDI: ffff8880261ea500
RBP: ffff88802d439f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802d439f00
R13: ffff88802d439f00 R14: 1ffff92000891e39 R15: ffff88802853e800
FS:  00005555690ac500(0000) GS:ffff8880d6572000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a63fff CR3: 000000003fb78000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 virtio_gpu_array_add_fence+0xcd/0x140 drivers/gpu/drm/virtio/virtgpu_gem.c:257
 virtio_gpu_queue_ctrl_sgs drivers/gpu/drm/virtio/virtgpu_vq.c:410 [inline]
 virtio_gpu_queue_fenced_ctrl_buffer+0x578/0xfb0 drivers/gpu/drm/virtio/virtgpu_vq.c:500
 virtio_gpu_cursor_plane_update+0x411/0xbc0 drivers/gpu/drm/virtio/virtgpu_plane.c:463
 drm_atomic_helper_commit_planes+0x497/0xf10 drivers/gpu/drm/drm_atomic_helper.c:3038
 drm_atomic_helper_commit_tail+0x7f/0x130 drivers/gpu/drm/drm_atomic_helper.c:1989
 commit_tail+0x338/0x430 drivers/gpu/drm/drm_atomic_helper.c:2074
 drm_atomic_helper_commit+0x303/0x380 drivers/gpu/drm/drm_atomic_helper.c:2312
 drm_atomic_commit+0x230/0x300 drivers/gpu/drm/drm_atomic.c:1789
 drm_atomic_helper_update_plane+0x314/0x400 drivers/gpu/drm/drm_atomic_helper.c:3438
 __setplane_atomic+0x22d/0x350 drivers/gpu/drm/drm_plane.c:1101
 drm_mode_cursor_universal+0x5e9/0xe20 drivers/gpu/drm/drm_plane.c:1256
 drm_mode_cursor_common+0x308/0x970 drivers/gpu/drm/drm_plane.c:1315
 drm_mode_cursor_ioctl+0xd4/0x110 drivers/gpu/drm/drm_plane.c:1365
 drm_ioctl_kernel+0x1f3/0x3e0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x5e6/0xc60 drivers/gpu/drm/drm_ioctl.c:901
 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+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7754f9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd0c03a0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7755215fa0 RCX: 00007f7754f9cdd9
RDX: 0000200000000100 RSI: 00000000c01c64a3 RDI: 0000000000000003
RBP: 00007ffd0c03a120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f7755215fac R14: 00007f7755215fa0 R15: 00007f7755215fa0
 </TASK>