------------[ cut here ]------------
WARNING: drivers/gpu/drm/drm_prime.c:224 at drm_prime_destroy_file_private+0x43/0x60 drivers/gpu/drm/drm_prime.c:224, CPU#2: syz.1.2731/23923
Modules linked in:
CPU: 2 UID: 0 PID: 23923 Comm: syz.1.2731 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0x43/0x60 drivers/gpu/drm/drm_prime.c:224
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 21 48 8b 83 90 00 00 00 48 85 c0 75 06 5b e9 63 43 6c fc e8 5e 43 6c fc 90 <0f> 0b 90 5b e9 54 43 6c fc e8 4f 1d d6 fc eb d8 66 66 2e 0f 1f 84
RSP: 0018:ffffc90005137970 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803d67e380 RCX: ffffffff8b7965d1
RDX: ffff88805af74980 RSI: ffffffff8552a312 RDI: ffff88803d67e410
RBP: ffff88803d67e000 R08: 0000000000000001 R09: fffff52000a26f0e
R10: ffffc90005137877 R11: 0000000000000000 R12: ffff888104316000
R13: ffff88803d67e2b0 R14: 0000000000000000 R15: ffff88803d67e2d8
FS:  0000000000000000(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd56f067a0 CR3: 000000000e184000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drm_file_free.part.0+0x7ee/0xcd0 drivers/gpu/drm/drm_file.c:269
 drm_file_free drivers/gpu/drm/drm_file.c:237 [inline]
 drm_close_helper.isra.0+0x186/0x1f0 drivers/gpu/drm/drm_file.c:290
 drm_release+0x1ab/0x360 drivers/gpu/drm/drm_file.c:438
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x87f/0x2bd0 kernel/exit.c:971
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6bbf1c2085
Code: Unable to access opcode bytes at 0x7f6bbf1c205b.
RSP: 002b:00007f6bc0064f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f6bbf3e6180 RCX: 00007f6bbf1c2085
RDX: 00007f6bc0064fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f6bbf213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f6bbf3e6218 R14: 00007f6bbf3e6180 R15: 00007ffd56f0a808
 </TASK>