On Thu, Mar 29, 2018 at 02:35:44PM -0400, Stephen Smalley wrote:
> >
> > broke a longstanding assumption by SELinux that it could call getxattr with
> > a NULL buffer and 0 size to probe whether the filesystem supports the
> > security xattrs at mount time.
> >
> > Options for fixing:
> > - Revert or revise that patch to not return -ERANGE if buffer is NULL
> > (prior behavior),
> > - Change SELinux sb_finish_set_opts() to treat -ERANGE as a non-error
> > result.
>
> Per https://bugzilla.kernel.org/show_bug.cgi?id=199185#c4, other callers
> besides SELinux are also broken by this change, so a revert or revision of
> the ext4 commit seems necessary regardless.
Yes, the breakage is my fault; my apologies. The new version of the
patch is already posted in bugzilla (and on linux-ext4). I'll be
pushing out a refreshed ext4.git branch shortly.
- Ted
