BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): at unmount dio bytes count 16384
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WARNING: CPU: 0 PID: 5848 at fs/btrfs/block-group.c:172 btrfs_put_block_group+0x2fb/0x350
Modules linked in:
CPU: 0 UID: 0 PID: 5848 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:btrfs_put_block_group+0x2fb/0x350
Code: 42 80 3c 20 00 74 08 48 89 df e8 70 5f 38 fe bf 48 17 00 00 48 03 3b 48 89 de e8 70 a2 01 00 e9 c0 fe ff ff e8 36 f1 d4 fd 90 <0f> 0b 90 e9 84 fe ff ff e8 28 f1 d4 fd e9 7a fe ff ff e8 1e f1 d4
RSP: 0018:ffffc9000446fac0 EFLAGS: 00010293
RAX: ffffffff83eabcda RBX: ffff888038fbc000 RCX: ffff88802566d640
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888029abdb57 R09: 1ffff11005357b6a
R10: dffffc0000000000 R11: ffffed1005357b6b R12: dffffc0000000000
R13: ffff888038fbc31c R14: 0000000000004000 R15: dffffc0000000000
FS:  000055557c592500(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32506ff8 CR3: 0000000113a1c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xb6b/0xf40
 close_ctree+0x7bc/0x1380
 generic_shutdown_super+0x135/0x2c0
 kill_anon_super+0x3b/0x70
 btrfs_kill_super+0x41/0x50
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa3b58ff17
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe3de218e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007faa3b611c05 RCX: 00007faa3b58ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe3de219a0
RBP: 00007ffe3de219a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe3de22a30
R13: 00007faa3b611c05 R14: 00000000000119c1 R15: 00007ffe3de22a70
 </TASK>
