On Mon, Oct 26, 2020 at 04:32:18PM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > In validate_ag[fi], we should check that the levels of the rmap and > refcount btrees are valid. If they aren't, we need to tell phase4 to > skip the comparison between the existing and incore rmap and refcount > data. The comparison routines use libxfs btree cursors, which assume > that the caller validated bc_nlevels and will corrupt memory if we load > a btree cursor with a garbage level count. > > This was found by examing a core dump from a failed xfs/086 invocation. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>
