Comment 11 for bug 1612492

I tested different kernels and two filesystem (xfs and ext4). It turns out that we cannot read less than value_size (which is 81 in ecryptfs) buffer when doing ecryptfs_read_and_validate_xattr_region(). In ecryptfs_read_and_validate_xattr_region() function, "file_size" array is the buffer we're going to read from xatte region and write. The reasonable solution is read 4096 instead of 16 from xattr region.

Any thoughts?