BTRFS info (device loop0): scrub: started on devid 1 BTRFS info (device loop0): left=0, need=98304, flags=2 BTRFS info (device loop0): space_info SYSTEM (sub-group id 0) has 0 free, is not full BTRFS info (device loop0): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=0, readonly=4190208 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): scrub: finished on devid 1 with status: 0 BTRFS info (device loop0): balance: start -sconvert=raid0,soft BTRFS info (device loop0): relocating block group 8519680 flags system BTRFS error (device loop0): allocation failed flags 10, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop0): space_info SYSTEM (sub-group id 0) has 4161536 free, is not full BTRFS info (device loop0): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=32768, readonly=8253440 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 32768 reserved 28672 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): block group 1048576 has 4194304 bytes, 0 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (4194304 bytes available) BTRFS critical (device loop0): entry offset 1048576, bytes 4194304, 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): block group 8519680 has 8257536 bytes, 4096 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (8253440 bytes available) [readonly] BTRFS critical (device loop0): entry offset 8523776, bytes 8253440, bitmap no 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): 12447744 bytes available across all block groups BTRFS info (device loop0): relocating block group 1048576 flags system BTRFS error (device loop0): allocation failed flags 10, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop0): space_info SYSTEM (sub-group id 0) has 8155136 free, is not full BTRFS info (device loop0): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4194304 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop0): trans_block_rsv: size 262144 reserved 262144 BTRFS info (device loop0): chunk_block_rsv: size 98304 reserved 94208 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 524288 reserved 524288 BTRFS info (device loop0): block group 1048576 has 4194304 bytes, 0 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (4194304 bytes available) [readonly] BTRFS critical (device loop0): entry offset 1048576, bytes 4194304, bitmap no 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, 4096 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (8253440 bytes available) BTRFS critical (device loop0): entry offset 8523776, bytes 8253440, 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): 12447744 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/volumes.c:3338 at btrfs_remove_chunk+0x1772/0x2020 fs/btrfs/volumes.c:3338, CPU#0: syz.0.0/5337 Modules linked in: CPU: 0 UID: 0 PID: 5337 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_remove_chunk+0x1775/0x2020 fs/btrfs/volumes.c:3338 Code: ee e3 fd e9 12 01 00 00 e8 58 e5 c9 fd 84 c0 74 28 e8 1f ee e3 fd e9 ff 00 00 00 e8 15 ee e3 fd 48 8d 3d 2e 39 ae 0b 44 89 ee <67> 48 0f b9 3a e9 3e f9 ff ff e8 7c 78 7e 07 e8 17 7f 7e 07 41 89 RSP: 0018:ffffc9000ca278c0 EFLAGS: 00010283 RAX: ffffffff83dd173b RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc90021022000 RSI: 00000000ffffffe4 RDI: ffffffff8f8b5070 RBP: ffffc9000ca27ab0 R08: ffff888000b90000 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000002 R12: dffffc0000000000 R13: ffffffffffffffe4 R14: ffff888010ec0001 R15: ffff888012207818 FS: 00007fde7de5b6c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fde7dd17d60 CR3: 0000000041110000 CR4: 0000000000352ef0 Call Trace: btrfs_relocate_chunk+0x29b/0x5c0 fs/btrfs/volumes.c:3469 __btrfs_balance+0x18ff/0x24e0 fs/btrfs/volumes.c:4197 btrfs_balance+0xac2/0x11b0 fs/btrfs/volumes.c:4571 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3525 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+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fde7cf8f7c9 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:00007fde7de5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fde7d1e5fa0 RCX: 00007fde7cf8f7c9 RDX: 0000200000000780 RSI: 00000000c4009420 RDI: 0000000000000008 RBP: 00007fde7d013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fde7d1e6038 R14: 00007fde7d1e5fa0 R15: 00007ffea1926e88 ---------------- Code disassembly (best guess): 0: ee out %al,(%dx) 1: e3 fd jrcxz 0x0 3: e9 12 01 00 00 jmp 0x11a 8: e8 58 e5 c9 fd call 0xfdc9e565 d: 84 c0 test %al,%al f: 74 28 je 0x39 11: e8 1f ee e3 fd call 0xfde3ee35 16: e9 ff 00 00 00 jmp 0x11a 1b: e8 15 ee e3 fd call 0xfde3ee35 20: 48 8d 3d 2e 39 ae 0b lea 0xbae392e(%rip),%rdi # 0xbae3955 27: 44 89 ee mov %r13d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 3e f9 ff ff jmp 0xfffff972 34: e8 7c 78 7e 07 call 0x77e78b5 39: e8 17 7f 7e 07 call 0x77e7f55 3e: 41 rex.B 3f: 89 .byte 0x89