------------[ cut here ]------------ WARNING: CPU: 0 PID: 136 at fs/btrfs/block-group.c:3503 do_chunk_alloc fs/btrfs/block-group.c:3503 [inline] WARNING: CPU: 0 PID: 136 at fs/btrfs/block-group.c:3503 btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3726 Modules linked in: CPU: 0 PID: 136 Comm: kworker/u4:1 Not tainted 5.15.168-syzkaller-00685-g584a40a22cb9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound btrfs_async_reclaim_metadata_space pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : do_chunk_alloc fs/btrfs/block-group.c:3503 [inline] pc : btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3726 lr : do_chunk_alloc fs/btrfs/block-group.c:3503 [inline] lr : btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3726 sp : ffff80001d206660 x29: ffff80001d2066c0 x28: ffff0000de934210 x27: 0000000000000005 x26: ffffffffffffffe4 x25: ffff0000de93425b x24: ffff0000d9d08868 x23: 00000000ffffffe4 x22: 1fffe0001bd2684d x21: ffff0000c2a50800 x20: dfff800000000000 x19: ffff0000d6077800 x18: 0000000000000001 x17: 0000000000000000 x16: ffff800011abbac4 x15: 00000000ffffffff x14: ffff0000c24c8000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 395fb490de950e00 x8 : 395fb490de950e00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001d205dd8 x4 : ffff800014b905e0 x3 : ffff800008555dd4 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 Call trace: do_chunk_alloc fs/btrfs/block-group.c:3503 [inline] btrfs_chunk_alloc+0x8f8/0xcdc fs/btrfs/block-group.c:3726 find_free_extent_update_loop fs/btrfs/extent-tree.c:4039 [inline] find_free_extent+0x324c/0x44e8 fs/btrfs/extent-tree.c:4402 btrfs_reserve_extent+0x1b4/0x43c fs/btrfs/extent-tree.c:4483 cow_file_range+0x4f0/0xb74 fs/btrfs/inode.c:1181 btrfs_run_delalloc_range+0x314/0x12cc fs/btrfs/inode.c:2018 writepage_delalloc+0x1d4/0x434 fs/btrfs/extent_io.c:3802 __extent_writepage+0x624/0xcbc fs/btrfs/extent_io.c:4108 extent_write_cache_pages fs/btrfs/extent_io.c:5030 [inline] extent_writepages+0x9b0/0x1268 fs/btrfs/extent_io.c:5157 btrfs_writepages+0x28/0x38 fs/btrfs/inode.c:8631 do_writepages+0x39c/0x5ec mm/page-writeback.c:2386 filemap_fdatawrite_wbc+0x1c8/0x228 mm/filemap.c:400 start_delalloc_inodes+0x630/0xa30 fs/btrfs/inode.c:10127 btrfs_start_delalloc_roots+0x5e4/0x898 fs/btrfs/inode.c:10206 shrink_delalloc fs/btrfs/space-info.c:538 [inline] flush_space+0x5b0/0xc94 fs/btrfs/space-info.c:646 btrfs_async_reclaim_metadata_space+0x6c8/0x80c fs/btrfs/space-info.c:953 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 irq event stamp: 1047948 hardirqs last enabled at (1047947): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (1047948): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (1047800): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (1047800): [] batadv_nc_purge_paths+0x308/0x38c net/batman-adv/network-coding.c:475 softirqs last disabled at (1047798): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (1047798): [] batadv_nc_purge_paths+0xd0/0x38c net/batman-adv/network-coding.c:446 ---[ end trace 7e6a534278d5120e ]--- BTRFS: error (device loop2) in do_chunk_alloc:3503: errno=-28 No space left BTRFS info (device loop2): forced readonly BTRFS: error (device loop2) in btrfs_create_pending_block_groups:2443: errno=-28 No space left