autofs-5.1.7 - fix missing lock release in mount_subtree()

From: Ian Kent <raven@themaw.net>

Covarity: missing_unlock: Returning without unlocking "mc->rwlock".

Signed-off-by: Ian Kent <raven@themaw.net>
---
 CHANGELOG           |    1 +
 modules/parse_sun.c |    1 +
 2 files changed, 2 insertions(+)

diff --git a/CHANGELOG b/CHANGELOG
index 1d56c96f..ff3d88eb 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -61,6 +61,7 @@
 - remove redundant assignment in master_add_amd_mount_section_mounts().
 - fix dead code in mnts_add_mount().
 - fix arg not used in error print.
+- fix missing lock release in mount_subtree().
 
 25/01/2021 autofs-5.1.7
 - make bind mounts propagation slave by default.
diff --git a/modules/parse_sun.c b/modules/parse_sun.c
index 05f53fc2..5d15f892 100644
--- a/modules/parse_sun.c
+++ b/modules/parse_sun.c
@@ -1105,6 +1105,7 @@ static int mount_subtree(struct autofs_point *ap, struct mapent_cache *mc,
 		len = mount_fullpath(key, PATH_MAX, ap->path, ap->len, me->key);
 		if (!len) {
 			warn(ap->logopt, "path loo long");
+			cache_unlock(mc);
 			return 1;
 		}
 		key[len] = '/';