BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
BTRFS info (device loop0): found 9 extents, stage: move data extents
BTRFS info (device loop0): leaf 8617984 gen 15 total ptrs 7 free space 3314 owner 18446744073709551607
	item 0 key (256 INODE_ITEM 0) itemoff 3835 itemsize 160
		inode generation 5 transid 0 size 0 nbytes 0
		block group 0 mode 40755 links 1 uid 0 gid 0
		rdev 0 sequence 0 flags 0x0
		atime 1669132761.0
		ctime 1669132761.0
		mtime 1669132761.0
		otime 0.0
	item 1 key (256 INODE_REF 256) itemoff 3823 itemsize 12
		index 0 name_len 2
	item 2 key (258 INODE_ITEM 0) itemoff 3663 itemsize 160
		inode generation 1 transid 15 size 114688 nbytes 20480
		block group 0 mode 100600 links 0 uid 0 gid 0
		rdev 0 sequence 3 flags 0x18
		atime 0.0
		ctime 1781741814.417304779
		mtime 0.0
		otime 0.0
	item 3 key (258 EXTENT_DATA 0) itemoff 3595 itemsize 68
		generation 13 type 0
		inline extent data size 47 ram_bytes 4096 compression 1
	item 4 key (258 EXTENT_DATA 90112) itemoff 3542 itemsize 53
		generation 15 type 1
		extent data disk bytenr 8560640 nr 4096
		extent data offset 0 nr 4096 ram 4096
		extent compression 0
	item 5 key (258 EXTENT_DATA 102400) itemoff 3489 itemsize 53
		generation 15 type 1
		extent data disk bytenr 8577024 nr 12288
		extent data offset 0 nr 12288 ram 12288
		extent compression 0
	item 6 key (18446744073709551611 ORPHAN_ITEM 258) itemoff 3489 itemsize 0
BTRFS error (device loop0): unexpected non-zero offset in file extent item for data reloc inode 258 key offset 0 offset 9277520992061368337
------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/ctree.c:531 at btrfs_force_cow_block+0x1a3a/0x1bf0 fs/btrfs/ctree.c:531, CPU#0: syz.0.0/5315
Modules linked in:
CPU: 0 UID: 0 PID: 5315 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 04/01/2014
RIP: 0010:btrfs_force_cow_block+0x1a3a/0x1bf0 fs/btrfs/ctree.c:531
Code: 87 db fd 90 0f 0b 90 44 89 f1 f7 d9 4c 8b 6c 24 08 e9 d8 f7 ff ff e8 b5 87 db fd eb 10 e8 ae 87 db fd eb 09 e8 a7 87 db fd 90 <0f> 0b 90 44 89 f1 f7 d9 4c 8b 6c 24 08 e9 1e f8 ff ff e8 8f 87 db
RSP: 0018:ffffc90006ed72a0 EFLAGS: 00010283
RAX: ffffffff83eaa849 RBX: ffff8880124c8001 RCX: 0000000000100000
RDX: ffffc90020802000 RSI: 00000000000477f1 RDI: 00000000000477f2
RBP: ffffc90006ed7420 R08: ffff88803f342540 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: dffffc0000000000
R13: ffff888047548178 R14: 00000000ffffff8b R15: ffff888011e3d05f
FS:  00007f0047df76c0(0000) GS:ffff88808c85f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f003bdff000 CR3: 00000000133be000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_cow_block+0x3f1/0xaf0 fs/btrfs/ctree.c:696
 merge_reloc_root+0x10d9/0x1930 fs/btrfs/relocation.c:1716
 merge_reloc_roots+0x386/0x8d0 fs/btrfs/relocation.c:1917
 relocate_block_group+0xbd1/0xe90 fs/btrfs/relocation.c:3703
 do_nonremap_reloc+0xa7/0x560 fs/btrfs/relocation.c:5323
 btrfs_relocate_block_group+0x6e2/0xaf0 fs/btrfs/relocation.c:5490
 btrfs_relocate_chunk+0x114/0x810 fs/btrfs/volumes.c:3647
 __btrfs_balance+0x1b5f/0x29d0 fs/btrfs/volumes.c:4586
 btrfs_balance+0xaa6/0x1180 fs/btrfs/volumes.c:4973
 btrfs_ioctl_balance+0x3da/0x640 fs/btrfs/ioctl.c:3474
 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+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0046f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0047df6fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0047216090 RCX: 00007f0046f9ce59
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000005
RBP: 00007f0047032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0047216128 R14: 00007f0047216090 R15: 00007ffe9cae99c8
 </TASK>