BTRFS error (device loop0 state A): Transaction aborted (error -5)
BTRFS: error (device loop0 state A) in __btrfs_update_delayed_inode:1027: errno=-5 IO failure
BTRFS info (device loop0 state EA): forced readonly
BTRFS: error (device loop0 state EA) in __btrfs_run_delayed_items:1161: errno=-5 IO failure
BTRFS warning (device loop0 state EA): Skipping commit of aborted transaction.
BTRFS: error (device loop0 state EA) in cleanup_transaction:2068: errno=-5 IO failure
BTRFS info (device loop0 state EA): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
------------[ cut here ]------------
fs_info->delayed_refs_rsv.reserved > 0
WARNING: fs/btrfs/block-rsv.c:472 at btrfs_release_global_block_rsv+0x2e4/0x300 fs/btrfs/block-rsv.c:472, CPU#0: syz.0.0/5336
Modules linked in:
CPU: 0 UID: 0 PID: 5336 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:btrfs_release_global_block_rsv+0x2e4/0x300 fs/btrfs/block-rsv.c:472
Code: 0f 0b 90 e9 c1 fe ff ff e8 e9 bd af fd 90 0f 0b 90 e9 eb fe ff ff e8 db bd af fd 90 0f 0b 90 e9 15 ff ff ff e8 cd bd af fd 90 <0f> 0b 90 e9 46 ff ff ff e8 bf bd af fd 90 0f 0b 90 e9 69 ff ff ff
RSP: 0018:ffffc9000de0faa8 EFLAGS: 00010293
RAX: ffffffff8415fcd3 RBX: ffff8880412ec478 RCX: ffff88803645ca00
RDX: 0000000000000000 RSI: 0000000000010000 RDI: 0000000000000000
RBP: ffff8880412ec190 R08: ffff8880412f7023 R09: 1ffff1100825ee04
R10: dffffc0000000000 R11: ffffed100825ee05 R12: ffff8880412ec000
R13: 0000000000000000 R14: 0000000000010000 R15: dffffc0000000000
FS:  0000555588084540(0000) GS:ffff88808c885000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558d0b82f9c0 CR3: 0000000036f25000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xdf0/0x1090 fs/btrfs/block-group.c:4756
 close_ctree+0x7f3/0x12d0 fs/btrfs/disk-io.c:4458
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
 kill_anon_super+0x3b/0x70 fs/super.c:1292
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 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: 0033:0x7f28c499cdd9
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:00007ffd9c2bc218 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffd9c2bc300 RCX: 00007f28c499cdd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001b62e R08: 0000000000000001 R09: 0000000000000000
R10: 00007f28c47ff030 R11: 0000000000000246 R12: 00007ffd9c2bc340
R13: 00007f28c4c15fac R14: 000000000001c19d R15: 00007f28c4c15fa0
 </TASK>