On Thu, Jul 12, 2018 at 04:19:07PM -0700, Andrew Morton wrote: > On Thu, 12 Jul 2018 20:07:51 -0300 Ernesto A. Fernández <ernesto.mnd.fernandez@xxxxxxxxx> wrote: > > > On Thu, Jul 12, 2018 at 03:33:11PM -0700, Andrew Morton wrote: > > > On Thu, 12 Jul 2018 18:53:47 -0300 Ernesto A. Fernández <ernesto.mnd.fernandez@xxxxxxxxx> wrote: > > > > > > > Check that the hidden directory is not NULL before using it, instead of > > > > after. > > > > > > > > > > Under what circumstances does the crash happen? Mount of a corrupted fs? > > > > No, when looking up corrupted catalog data (dentry) on a filesystem with > > no metadata directory (this could only ever happen on a read-only mount). > > Wen Xu sent the replication steps in detail to the fsdevel list, here is > > a link: > > > > https://bugzilla.kernel.org/show_bug.cgi?id=200297 > > > > I did not explain this because I think the diff makes it clear that there > > is a bug at least. > > It is important that we know what circumstances lead to the bug being > triggered, so that people can decide whether to backport the fix into > their various kernels. > OK, I'll resend with more details.
