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
