Comment 0 for bug 1580257

The current version of btrfs-progs in Ubuntu 16.04 produces false positives when checking a healthy btrfs filesystem:

user@hostname:~$ sudo btrfsck /dev/sdb
Checking filesystem on /dev/sdb
UUID: 61d71zg9-2h4a-4hf2f-b782-c23645es4h0
checking extents
bad metadata [1054547705856, 1054547722240) crossing stripe boundary
bad metadata [1054797594624, 1054797611008) crossing stripe boundary
bad metadata [1054863392768, 1054863409152) crossing stripe boundary
[...]

This is a known bug that has been fixed upstream (v4.5.2):

https://github.com/kdave/btrfs-progs/commit/12234d0202a30fb225ebae817b5eb2e80b641d4c

I hope this fix can be backported to prevent unnecessary and possibly harmful filesystem repair attempts.

Version information:
~$ uname -a
Linux kk 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

~$ btrfs --version
btrfs-progs v4.4