From: Ondřej Surý <ondrej@isc.org>
Date: Sat, 14 Mar 2026 11:46:05 +0000 (+0100)
Subject: Fix memory context leak in dns_client_resolve() error path
X-Git-Tag: v9.21.21~41^2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0165070c7f11e09498ad7c8e19ada7eea1fa044;p=thirdparty%2Fbind9.git

Fix memory context leak in dns_client_resolve() error path

Use isc_mem_putanddetach() instead of isc_mem_put() to properly
detach the attached memory context stored in resarg->mctx.
---

diff --git a/lib/dns/client.c b/lib/dns/client.c
index 91e74e17b23..565c4d8ce90 100644
--- a/lib/dns/client.c
+++ b/lib/dns/client.c
@@ -953,7 +953,7 @@ dns_client_resolve(dns_client_t *client, const dns_name_t *name,
 	result = startresolve(client, name, rdclass, type, options,
 			      resolve_done, resarg, &resarg->trans);
 	if (result != ISC_R_SUCCESS) {
-		isc_mem_put(client->mctx, resarg, sizeof(*resarg));
+		isc_mem_putanddetach(&resarg->mctx, resarg, sizeof(*resarg));
 		return result;
 	}