syzbot

BTRFS info (device loop0): using xxhash64 (xxhash64-generic) checksum algorithm
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): auto enabling async discard
BTRFS info (device loop0): balance: start -s
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: CPU: 0 PID: 5952 at fs/btrfs/block-group.c:2776 btrfs_create_pending_block_groups+0xe10/0xf20 fs/btrfs/block-group.c:2776
Modules linked in:
CPU: 0 PID: 5952 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:btrfs_create_pending_block_groups+0xe10/0xf20 fs/btrfs/block-group.c:2776
Code: 74 cc 6b 8c ba df 0a 00 00 44 89 e1 e8 69 ab cd 06 e9 19 f6 ff ff e8 8f ae ed fd 48 c7 c7 40 f7 ee 8a 44 89 e6 e8 f0 2b b8 fd <0f> 0b e9 79 fe ff ff e8 74 ae ed fd 48 c7 c7 40 f7 ee 8a 44 89 ee
RSP: 0018:ffffc900032b7740 EFLAGS: 00010246
RAX: b72fee9904858f00 RBX: 0000000000000000 RCX: ffff88802cdb1e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900032b7990 R08: ffffc900032b7347 R09: 1ffff92000656e68
R10: dffffc0000000000 R11: fffff52000656e69 R12: 00000000ffffffe4
R13: ffff88802e2d8850 R14: ffff88802e2d8858 R15: ffff888060934001
FS:  000055557b275500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7178852723 CR3: 0000000075ae5000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __btrfs_end_transaction+0x140/0x630 fs/btrfs/transaction.c:1023
 btrfs_inc_block_group_ro+0x596/0x630 fs/btrfs/block-group.c:3037
 btrfs_relocate_block_group+0x3a5/0xaa0 fs/btrfs/relocation.c:4033
 btrfs_relocate_chunk+0x12a/0x3b0 fs/btrfs/volumes.c:3321
 __btrfs_balance+0x187b/0x21c0 fs/btrfs/volumes.c:4067
 btrfs_balance+0xcb1/0x11c0 fs/btrfs/volumes.c:4444
 btrfs_ioctl_balance+0x4a2/0x730 fs/btrfs/ioctl.c:3647
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd79b18efc9
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:00007ffcd8168df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd79b3e5fa0 RCX: 00007fd79b18efc9
RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003
RBP: 00007fd79b211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd79b3e5fa0 R14: 00007fd79b3e5fa0 R15: 0000000000000003
 </TASK>