From: Daniel Salzman <daniel.salzman@nic.cz>
Date: Wed, 17 Sep 2025 06:29:16 +0000 (+0200)
Subject: digest: avoid freeing a local variable (clang analyzer)
X-Git-Tag: v3.5.0~2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bc657c2a4b5782eb7dd712233fa089fbf65bc8fc;p=thirdparty%2Fknot-dns.git

digest: avoid freeing a local variable (clang analyzer)
---

diff --git a/src/knot/zone/digest.c b/src/knot/zone/digest.c
index c6f03e9047..5bcb46328b 100644
--- a/src/knot/zone/digest.c
+++ b/src/knot/zone/digest.c
@@ -262,7 +262,9 @@ int zone_update_add_digest(struct zone_update *update, int algorithm, bool place
 
 		ret = zone_update_remove(update, &exists);
 		if (ret != KNOT_EOK && ret != KNOT_ENOENT) {
-			free(digest);
+			if (digest != &zero) {
+				free(digest);
+			}
 			return ret;
 		}
 	}