------------[ cut here ]------------
WARNING: CPU: 1 PID: 4167 at fs/btrfs/extent-tree.c:3067 __btrfs_free_extent+0x720/0x1aa4 fs/btrfs/extent-tree.c:3067
Modules linked in:
CPU: 1 PID: 4167 Comm: kworker/u4:8 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __btrfs_free_extent+0x720/0x1aa4 fs/btrfs/extent-tree.c:3067
lr : __btrfs_free_extent+0x720/0x1aa4 fs/btrfs/extent-tree.c:3067
sp : ffff80001f5c73c0
x29: ffff80001f5c74e0 x28: fffffffffffffff7 x27: dfff800000000000
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0000e7a8f4d0
x23: 0000000000500000 x22: 00000000ffffffe4 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000e7fb2630 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111a3970 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 12b47b00d51d2000
x8 : 12b47b00d51d2000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f5c6cb8 x4 : ffff80001422f280 x3 : ffff800008503848
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 __btrfs_free_extent+0x720/0x1aa4 fs/btrfs/extent-tree.c:3067
 run_one_delayed_ref fs/btrfs/extent-tree.c:-1 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1962 [inline]
 __btrfs_run_delayed_refs+0xc5c/0x3354 fs/btrfs/extent-tree.c:2025
 btrfs_run_delayed_refs+0x124/0x46c fs/btrfs/extent-tree.c:2156
 flush_space+0x828/0xbd8 fs/btrfs/space-info.c:660
 btrfs_async_reclaim_metadata_space+0x678/0x7b0 fs/btrfs/space-info.c:953
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
irq event stamp: 644284
hardirqs last  enabled at (644283): [<ffff8000082f7640>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (644284): [<ffff80001119f244>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (644132): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (644132): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (643929): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (643929): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (643929): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (643929): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
---[ end trace 26e4e920df41d9ce ]---
BTRFS: error (device loop0) in __btrfs_free_extent:3067: errno=-28 No space left
BTRFS info (device loop0): forced readonly
BTRFS error (device loop0): failed to run delayed ref for logical 5242880 num_bytes 4096 type 176 action 2 ref_mod 1: -28
BTRFS: error (device loop0) in btrfs_run_delayed_refs:2158: errno=-28 No space left