BTRFS info (device loop6 state M): 1 free space entries at or bigger than 4096 bytes BTRFS info (device loop6 state M): 12447744 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 1 PID: 7736 at fs/btrfs/volumes.c:3426 btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3426 Modules linked in: CPU: 1 UID: 0 PID: 7736 Comm: syz.6.215 Not tainted 6.15.0-rc4-syzkaller-g66d2d510fea3 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3426 lr : btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3426 sp : ffff80009f7e7660 x29: ffff80009f7e77e0 x28: ffff0000db8ba184 x27: dfff800000000000 x26: ffff0000db8ba128 x25: dfff800000000000 x24: ffffffffffffffe4 x23: ffff0000d1b9ca38 x22: 00000000ffffffe4 x21: ffff0000d1b9ca00 x20: dfff800000000000 x19: 0000000000000000 x18: 00000000ffffffff x17: 0000000000000000 x16: ffff80008ad0c888 x15: ffff700011e6ff2c x14: 1ffff00011e6ff2c x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000080000 x10: 0000000000041a67 x9 : 0ef1fbaf48f7b100 x8 : 0ef1fbaf48f7b100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80009f7e6fb8 x4 : ffff80008f3f4f00 x3 : ffff800080540564 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: btrfs_remove_chunk+0x131c/0x1804 fs/btrfs/volumes.c:3426 (P) btrfs_delete_unused_bgs+0x9a8/0xbfc fs/btrfs/block-group.c:1701 btrfs_remount_ro fs/btrfs/super.c:1356 [inline] btrfs_reconfigure+0x8fc/0x2418 fs/btrfs/super.c:1537 reconfigure_super+0x1d4/0x6f0 fs/super.c:1083 do_remount fs/namespace.c:3368 [inline] path_mount+0xb34/0xde0 fs/namespace.c:4203 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 1262 hardirqs last enabled at (1261): [] __up_console_sem kernel/printk/printk.c:344 [inline] hardirqs last enabled at (1261): [] __console_unlock+0x70/0xc4 kernel/printk/printk.c:2885 hardirqs last disabled at (1262): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (872): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (870): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop6 state MA): dumping space info: BTRFS info (device loop6 state MA): space_info DATA+METADATA has 995328 free, is not full BTRFS info (device loop6 state MA): space_info total=3276800, used=53248, pinned=0, reserved=4096, may_use=2224128, readonly=0 zone_unusable=0 BTRFS info (device loop6 state MA): space_info SYSTEM has 8155136 free, is not full BTRFS info (device loop6 state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4194304 zone_unusable=0 BTRFS info (device loop6 state MA): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop6 state MA): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop6 state MA): chunk_block_rsv: size 98304 reserved 98304 BTRFS info (device loop6 state MA): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop6 state MA): delayed_refs_rsv: size 262144 reserved 262144 BTRFS: error (device loop6 state MA) in btrfs_remove_chunk:3426: errno=-28 No space left