BTRFS info (device loop6): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
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WARNING: fs/btrfs/block-rsv.c:463 at btrfs_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:463, CPU#0: syz-executor/6405
Modules linked in:
CPU: 0 UID: 0 PID: 6405 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:btrfs_release_global_block_rsv+0x254/0x270 fs/btrfs/block-rsv.c:463
Code: 0f 0b 90 e9 e1 fe ff ff e8 a9 74 cc fd 90 0f 0b 90 e9 0b ff ff ff e8 9b 74 cc fd 90 0f 0b 90 e9 35 ff ff ff e8 8d 74 cc fd 90 <0f> 0b 90 e9 66 ff ff ff e8 7f 74 cc fd 90 0f 0b 90 eb 88 66 0f 1f
RSP: 0018:ffffc900021afaa8 EFLAGS: 00010293
RAX: ffffffff83f48333 RBX: ffff888028c2c400 RCX: ffff88802b7d0000
RDX: 0000000000000000 RSI: 0000000000060000 RDI: 0000000000000000
RBP: ffff888028c2c180 R08: ffff88807aa3c823 R09: 1ffff1100f547904
R10: dffffc0000000000 R11: ffffed100f547905 R12: dead000000000100
R13: 0000000000000000 R14: 0000000000060000 R15: dffffc0000000000
FS:  000055556b7b8500(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7f44e40f0 CR3: 000000005d7ae000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 btrfs_free_block_groups+0xcbf/0xfd0 fs/btrfs/block-group.c:4579
 close_ctree+0x7bc/0x1380 fs/btrfs/disk-io.c:4410
 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:2129
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 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+0xef/0x4e0 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+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87ced90a77
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:00007ffd0c9e81a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f87cee13d7d RCX: 00007f87ced90a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0c9e8260
RBP: 00007ffd0c9e8260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd0c9e92f0
R13: 00007f87cee13d7d R14: 000000000003eba3 R15: 00007ffd0c9e9330
 </TASK>