autofs-5.1.8 - fix loop under run in cache_get_offset_parent()

From: Frank Sorenson <sorenson@redhat.com>

To avoid reading memory outside of the the string

allocated for parent, tail needs to stop when it

reaches or passes parent, even if it doesn't

actually equal parent.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>

---

 CHANGELOG   |    1 +

 lib/cache.c |    2 +-

 2 files changed, 2 insertions(+), 1 deletion(-)

--- autofs-5.1.7.orig/CHANGELOG

+++ autofs-5.1.7/CHANGELOG

@@ -88,6 +88,7 @@

 - fix fix root offset error handling.

 - fix nonstrict fail handling of last offset mount.

 - dont fail on duplicate offset entry tree add.

+- fix loop under run in cache_get_offset_parent().

 25/01/2021 autofs-5.1.7

 - make bind mounts propagation slave by default.

--- autofs-5.1.7.orig/lib/cache.c

+++ autofs-5.1.7/lib/cache.c

@@ -710,7 +710,7 @@ struct mapent *cache_get_offset_parent(s

 		*tail = 0;

 		tail--;

-		if (tail == parent)

+		if (tail <= parent)

 			break;

 		me = cache_lookup_distinct(mc, parent);