On Thu, Feb 22, 2018 at 05:59:54PM -0800, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > Yet another round of playing whack-a-mole with directory code that > asserts on corrupt on-disk metadata when it really should be returning > -EFSCORRUPTED instead of ASSERTing. Found by a xfs/391 crash while > lastbit fuzzing of ltail.bestcount. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > --- Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> > fs/xfs/libxfs/xfs_dir2_leaf.c | 3 ++- > fs/xfs/libxfs/xfs_dir2_node.c | 5 +++-- > 2 files changed, 5 insertions(+), 3 deletions(-) > > > diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c > index d7e630f..d61d52d 100644 > --- a/fs/xfs/libxfs/xfs_dir2_leaf.c > +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c > @@ -1415,7 +1415,8 @@ xfs_dir2_leaf_removename( > oldbest = be16_to_cpu(bf[0].length); > ltp = xfs_dir2_leaf_tail_p(args->geo, leaf); > bestsp = xfs_dir2_leaf_bests_p(ltp); > - ASSERT(be16_to_cpu(bestsp[db]) == oldbest); > + if (be16_to_cpu(bestsp[db]) != oldbest) > + return -EFSCORRUPTED; > /* > * Mark the former data entry unused. > */ > diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c > index 239d97a..0839ffe 100644 > --- a/fs/xfs/libxfs/xfs_dir2_node.c > +++ b/fs/xfs/libxfs/xfs_dir2_node.c > @@ -387,8 +387,9 @@ xfs_dir2_leaf_to_node( > dp->d_ops->free_hdr_from_disk(&freehdr, free); > leaf = lbp->b_addr; > ltp = xfs_dir2_leaf_tail_p(args->geo, leaf); > - ASSERT(be32_to_cpu(ltp->bestcount) <= > - (uint)dp->i_d.di_size / args->geo->blksize); > + if (be32_to_cpu(ltp->bestcount) > > + (uint)dp->i_d.di_size / args->geo->blksize) > + return -EFSCORRUPTED; > > /* > * Copy freespace entries from the leaf block to the new block. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
