loop0: detected capacity change from 0 to 32768
BTRFS: device fsid 14d642db-7b15-43e4-81e6-4b8fac6a25f8 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5321)
BTRFS info (device loop0): first mount of filesystem 14d642db-7b15-43e4-81e6-4b8fac6a25f8
BTRFS info (device loop0): using blake2b checksum algorithm
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
BTRFS info (device loop0): use zstd compression, level 3
------------[ cut here ]------------
!RB_EMPTY_ROOT(&prime_fpriv->dmabufs)
WARNING: drivers/gpu/drm/drm_prime.c:224 at drm_prime_destroy_file_private+0x4b/0x60 drivers/gpu/drm/drm_prime.c:224, CPU#0: syz.0.0/5321
Modules linked in:
CPU: 0 UID: 0 PID: 5321 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 04/01/2014
RIP: 0010:drm_prime_destroy_file_private+0x4b/0x60 drivers/gpu/drm/drm_prime.c:224
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 2d c9 c6 fc 48 83 3b 00 75 0c e8 72 fd 59 fc 5b e9 cc e4 41 06 cc e8 66 fd 59 fc 90 <0f> 0b 90 5b e9 bc e4 41 06 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90
RSP: 0018:ffffc9000e37f8a0 EFLAGS: 00010293
RAX: ffffffff856bd3da RBX: ffff8880124f43b0 RCX: ffff88804066a500
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880124f4328
RBP: ffff8880124f4278 R08: ffffc9000e37f827 R09: 1ffff92001c6ff04
R10: dffffc0000000000 R11: fffff52001c6ff05 R12: dffffc0000000000
R13: dead000000000100 R14: 0000000000000000 R15: ffff8880124f4288
FS:  0000000000000000(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005563f3a93ec0 CR3: 0000000048863000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drm_file_free+0x7f1/0xa00 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+0x44f/0xa60 fs/file_table.c:510
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x22c0 kernel/exit.c:975
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117
 get_signal+0x1284/0x1330 kernel/signal.c:3037
 arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x8c/0x4d0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc41cf9cdd9
Code: Unable to access opcode bytes at 0x7fc41cf9cdaf.
RSP: 002b:00007fc41de3f0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fc41d215fa8 RCX: 00007fc41cf9cdd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fc41d215fac
RBP: 00007fc41d215fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc41d216038 R14: 00007ffd80f3fa10 R15: 00007ffd80f3faf8
 </TASK>