BTRFS info (device loop5): last unmount of filesystem 24c7a497-3402-47dd-bef8-82358f5f30e0
BTRFS info (device loop5): at unmount dio bytes count 8192
------------[ cut here ]------------
cache->reserved > 0
WARNING: fs/btrfs/block-group.c:172 at btrfs_put_block_group+0x305/0x360 fs/btrfs/block-group.c:172, CPU#0: syz-executor/5923
Modules linked in:
CPU: 0 UID: 0 PID: 5923 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:btrfs_put_block_group+0x305/0x360 fs/btrfs/block-group.c:172
Code: 42 80 3c 20 00 74 08 48 89 df e8 a6 69 30 fe bf 10 1f 00 00 48 03 3b 48 89 de e8 36 aa 01 00 e9 c0 fe ff ff e8 cc 52 cd fd 90 <0f> 0b 90 e9 84 fe ff ff e8 be 52 cd fd e9 7a fe ff ff e8 b4 52 cd
RSP: 0018:ffffc90005417a98 EFLAGS: 00010293
RAX: ffffffff83f40c74 RBX: ffff888039c3c800 RCX: ffff88802636bc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10097ed470 R12: dffffc0000000000
R13: ffff888039c3cb3c R14: 0000000000002000 R15: dffffc0000000000
FS:  000055557f131500(0000) GS:ffff8881267fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab768a1b6c CR3: 000000003e4b2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xbf1/0xfd0 fs/btrfs/block-group.c:4573
 close_ctree+0x7b4/0x13a0 fs/btrfs/disk-io.c:4428
 generic_shutdown_super+0x135/0x2c0 fs/super.c:643
 kill_anon_super+0x3b/0x70 fs/super.c:1289
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1318
 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:44 [inline]
 exit_to_user_mode_loop+0xed/0x480 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+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c9778bf17
Code: a2 c7 05 7c 96 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff318f6138 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f8c977f471f RCX: 00007f8c9778bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff318f61f0
RBP: 00007fff318f61f0 R08: 00007fff318f71f0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff318f7280
R13: 00007f8c977f471f R14: 000000000003dc85 R15: 00007fff318f72c0
 </TASK>