------------[ cut here ]------------ WARNING: CPU: 0 PID: 4908 at fs/btrfs/block-group.c:3621 do_chunk_alloc fs/btrfs/block-group.c:3621 [inline] WARNING: CPU: 0 PID: 4908 at fs/btrfs/block-group.c:3621 btrfs_chunk_alloc+0xd5c/0xfa4 fs/btrfs/block-group.c:3863 Modules linked in: CPU: 0 PID: 4908 Comm: kworker/u4:7 Not tainted 6.1.64-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 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:3621 [inline] pc : btrfs_chunk_alloc+0xd5c/0xfa4 fs/btrfs/block-group.c:3863 lr : do_chunk_alloc fs/btrfs/block-group.c:3621 [inline] lr : btrfs_chunk_alloc+0xd5c/0xfa4 fs/btrfs/block-group.c:3863 sp : ffff800023da7890 x29: ffff800023da7900 x28: ffff0000dc201000 x27: 1fffe0001a586313 x26: 1fffe00025b57fec x25: ffff00012dabff63 x24: dfff800000000000 x23: ffff00012dabff18 x22: 0000000000000000 x21: 0000000000000000 x20: ffffffffffffffe4 x19: ffff0000d2c31800 x18: ffff800023da6c80 x17: 0000000000000000 x16: ffff8000121392fc x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : 0bdb2a92935c7d00 x8 : 0bdb2a92935c7d00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800023da7178 x4 : ffff8000158f2a20 x3 : ffff8000085890a0 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: do_chunk_alloc fs/btrfs/block-group.c:3621 [inline] btrfs_chunk_alloc+0xd5c/0xfa4 fs/btrfs/block-group.c:3863 flush_space+0x8c4/0xdb8 fs/btrfs/space-info.c:766 btrfs_async_reclaim_metadata_space+0x260/0x30c fs/btrfs/space-info.c:1080 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec 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: 2111832 hardirqs last enabled at (2111831): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (2111832): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (2108174): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (2108174): [] batadv_nc_purge_paths+0x2f4/0x378 net/batman-adv/network-coding.c:471 softirqs last disabled at (2108172): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (2108172): [] batadv_nc_purge_paths+0xd0/0x378 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop2: state A): dumping space info: BTRFS info (device loop2: state A): space_info DATA+METADATA has 3194880 free, is not full BTRFS info (device loop2: state A): space_info total=11534336, used=53248, pinned=20480, reserved=1568768, may_use=6696960, readonly=0 zone_unusable=0 BTRFS info (device loop2: state A): space_info SYSTEM has -98304 free, is not full BTRFS info (device loop2: state A): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4190208 zone_unusable=0 BTRFS info (device loop2: state A): global_block_rsv: size 917504 reserved 917504 BTRFS info (device loop2: state A): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop2: state A): chunk_block_rsv: size 98304 reserved 98304 BTRFS info (device loop2: state A): delayed_block_rsv: size 32768 reserved 32768 BTRFS info (device loop2: state A): delayed_refs_rsv: size 1441792 reserved 1441792 BTRFS: error (device loop2: state A) in do_chunk_alloc:3621: errno=-28 No space left BTRFS info (device loop2: state EA): forced readonly BTRFS: error (device loop2: state EA) in btrfs_create_pending_block_groups:2479: errno=-28 No space left