------------[ cut here ]------------ WARNING: CPU: 0 PID: 325 at fs/btrfs/extent-tree.c:3092 __btrfs_free_extent+0x1880/0x2320 fs/btrfs/extent-tree.c:3092 Modules linked in: CPU: 0 PID: 325 Comm: kworker/u4:4 Not tainted 6.1.140-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound btrfs_async_reclaim_metadata_space pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __btrfs_free_extent+0x1880/0x2320 fs/btrfs/extent-tree.c:3092 lr : __btrfs_free_extent+0x1880/0x2320 fs/btrfs/extent-tree.c:3092 sp : ffff800020ee7460 x29: ffff800020ee7580 x28: ffff0000df6fa738 x27: 0000000000000000 x26: 0000000000521000 x25: fffffffffffffff7 x24: 0000000000000000 x23: dfff800000000000 x22: 00000000ffffffe4 x21: dfff800000000000 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000040a35e4e x17: 0000000000000000 x16: ffff8000082d1c1c x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100 x11: ff008000081913ec x10: 0000000000000000 x9 : cec243f24e20a000 x8 : cec243f24e20a000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020ee6ef8 x4 : ffff800015154740 x3 : ffff80000852df5c x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: __btrfs_free_extent+0x1880/0x2320 fs/btrfs/extent-tree.c:3092 run_delayed_tree_ref fs/btrfs/extent-tree.c:1696 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1720 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1969 [inline] __btrfs_run_delayed_refs+0xba4/0x3280 fs/btrfs/extent-tree.c:2032 btrfs_run_delayed_refs+0x124/0x47c fs/btrfs/extent-tree.c:2163 flush_space+0x7ec/0xcdc fs/btrfs/space-info.c:744 btrfs_async_reclaim_metadata_space+0x25c/0x308 fs/btrfs/space-info.c:1080 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 irq event stamp: 861680 hardirqs last enabled at (861679): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (861680): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (861622): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (861622): [] batadv_nc_purge_paths+0x2f4/0x37c net/batman-adv/network-coding.c:471 softirqs last disabled at (861620): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (861620): [] batadv_nc_purge_paths+0xd0/0x37c net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop3: state A): dumping space info: BTRFS info (device loop3: state A): space_info DATA+METADATA has 2166784 free, is full BTRFS info (device loop3: state A): space_info total=3276800, used=53248, pinned=8192, reserved=0, may_use=1048576, readonly=0 zone_unusable=0 BTRFS info (device loop3: state A): space_info SYSTEM has 4190208 free, is not full BTRFS info (device loop3: state A): space_info total=12451840, used=4096, pinned=0, reserved=8257536, may_use=0, readonly=0 zone_unusable=0 BTRFS info (device loop3: state A): global_block_rsv: size 983040 reserved 983040 BTRFS info (device loop3: state A): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop3: state A): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop3: state A): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop3: state A): delayed_refs_rsv: size 65536 reserved 65536 BTRFS: error (device loop3: state A) in __btrfs_free_extent:3092: errno=-28 No space left BTRFS info (device loop3: state EA): forced readonly BTRFS error (device loop3: state EA): failed to run delayed ref for logical 5378048 num_bytes 4096 type 176 action 2 ref_mod 1: -28 BTRFS: error (device loop3: state EA) in btrfs_run_delayed_refs:2165: errno=-28 No space left