------------[ cut here ]------------
WARNING: CPU: 0 PID: 5378 at drivers/gpu/drm/drm_prime.c:223 drm_prime_destroy_file_private+0x4b/0x60 drivers/gpu/drm/drm_prime.c:223
Modules linked in:
CPU: 0 UID: 0 PID: 5378 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:drm_prime_destroy_file_private+0x4b/0x60 drivers/gpu/drm/drm_prime.c:223
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 ed 5f f2 fc 48 83 3b 00 75 0c e8 02 21 8b fc 5b e9 8c 01 16 06 cc e8 f6 20 8b fc 90 <0f> 0b 90 5b e9 7c 01 16 06 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90
RSP: 0018:ffffc9000d3e7880 EFLAGS: 00010293
RAX: ffffffff8534f31a RBX: ffff8880526ed410 RCX: ffff88801ab00000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880526ed380
RBP: ffff8880526ed2c8 R08: ffffc9000d3e7807 R09: 1ffff92001a7cf00
R10: dffffc0000000000 R11: fffff52001a7cf01 R12: dffffc0000000000
R13: dead000000000100 R14: 0000000000000000 R15: ffff8880526ed2d8
FS:  0000000000000000(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59ec5ec470 CR3: 0000000050ddb000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drm_file_free+0x7f2/0xa00 drivers/gpu/drm/drm_file.c:269
 drm_close_helper drivers/gpu/drm/drm_file.c:290 [inline]
 drm_release+0x2de/0x3f0 drivers/gpu/drm/drm_file.c:438
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59ec58da7f
Code: Unable to access opcode bytes at 0x7f59ec58da55.
RSP: 002b:00007f59ed40ad40 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: 0000000000e7e000 RBX: 0000000001000000 RCX: 00007f59ec58da7f
RDX: 0000000001000000 RSI: 00007f59e0400000 RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000004034
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000008
R13: 00007f59ed40adec R14: 00007f59ed40adf0 R15: 00007f59e0400000
 </TASK>