lib: fix the right value is returned for fail cases

Currently `bfd_get_peer_info` should return invalid sp->family
and dp->family during fail cases.

Before this fix, in those fail cases `bfd_get_peer_info` maybe
return valid sp->family and dp->family.

This fix ensures all fail cases return invalid sp->family and
dp->family for outside callers.

Signed-off-by: anlan_cs <anlan_cs@tom.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/bfd.c b/lib/bfd.c
index e36429745..7b711a9fb 100644
--- a/lib/bfd.c
+++ b/lib/bfd.c
@@ -171,6 +171,12 @@ static struct interface *bfd_get_peer_info(struct stream *s, struct prefix *dp,
 	return ifp;
 
 stream_failure:
+	/*
+	 * Clean dp and sp because caller
+	 * will immediately check them valid or not
+	 */
+	memset(dp, 0, sizeof(*dp));
+	memset(sp, 0, sizeof(*sp));
 	return NULL;
 }