BTRFS info (device loop0): balance: start -s BTRFS info (device loop0): unable to make block group 1048576 ro BTRFS info (device loop0): space_info SYSTEM (sub-group id 0) has 4190208 free, is not full BTRFS info (device loop0): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=0, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1441792 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 0 reserved 0 BTRFS info (device loop0): 1 enospc errors during balance BTRFS info (device loop0): balance: ended with status: -28 BTRFS error (device loop0): allocation failed flags 4, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has -5005312 free, is full BTRFS info (device loop0): space_info total=11534336, used=1376256, pinned=0, reserved=10158080, may_use=5005312, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1433600 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 524288 reserved 159744 BTRFS info (device loop0): block group 5242880 has 1638400 bytes, 1368064 used 0 pinned 270336 reserved 262144 delalloc 0 super 0 zone_unusable (0 bytes available) BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): block group 6881280 has 1638400 bytes, 8192 used 0 pinned 1630208 reserved 1630208 delalloc 0 super 0 zone_unusable (0 bytes available) BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): block group 8519680 has 8257536 bytes, 0 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (8257536 bytes available) BTRFS critical (device loop0): entry offset 8519680, bytes 8257536, bitmap no BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 1 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): 8257536 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 5341 at fs/btrfs/extent-tree.c:3237 __btrfs_free_extent+0x1dde/0x4000 fs/btrfs/extent-tree.c:3237 Modules linked in: CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__btrfs_free_extent+0x1dde/0x4000 fs/btrfs/extent-tree.c:3237 Code: fd 84 c0 0f 84 bb 02 00 00 e8 9e ae f6 fd e9 01 0c 00 00 e8 94 ae f6 fd 90 48 c7 c7 60 c4 ad 8b 8b 74 24 50 e8 f3 ba b9 fd 90 <0f> 0b 90 90 e9 a8 0c 00 00 e8 34 b3 7e 07 89 c3 31 ff 89 c6 e8 a9 RSP: 0018:ffffc9000d53f380 EFLAGS: 00010246 RAX: f49148f65844e900 RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000eed4000 RSI: 0000000000015e0b RDI: 0000000000015e0c RBP: ffffc9000d53f530 R08: ffff88801fe24293 R09: 1ffff11003fc4852 R10: dffffc0000000000 R11: ffffed1003fc4853 R12: 00000000ffffffe4 R13: dffffc0000000000 R14: ffff888051e60001 R15: ffff88805351d8f0 FS: 00007ff4a71f96c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000061b000 CR3: 00000000422b9000 CR4: 0000000000352ef0 Call Trace: run_delayed_tree_ref fs/btrfs/extent-tree.c:1749 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1775 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1972 [inline] __btrfs_run_delayed_refs+0xe7f/0x4130 fs/btrfs/extent-tree.c:2047 btrfs_run_delayed_refs+0xe6/0x3b0 fs/btrfs/extent-tree.c:2159 btrfs_commit_transaction+0x269/0x3950 fs/btrfs/transaction.c:2211 del_balance_item fs/btrfs/volumes.c:3751 [inline] reset_balance_state+0x20c/0x310 fs/btrfs/volumes.c:3815 btrfs_balance+0xfb8/0x11b0 fs/btrfs/volumes.c:4641 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3577 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff4a638efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff4a71f9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff4a65e6180 RCX: 00007ff4a638efc9 RDX: 0000200000000200 RSI: 00000000c4009420 RDI: 0000000000000004 RBP: 00007ff4a6411f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff4a65e6218 R14: 00007ff4a65e6180 R15: 00007ffdf72fa098