From 80fae7a4b7d8f9aa5aedb5f5ad34f90ce1ad3e77 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Sat, 14 Mar 2026 12:52:07 +0100
Subject: [PATCH] Fix memory leak in ixfr_commit() error path

The 'data' allocation was not freed when reaching the cleanup
label with an error result.
---
 lib/dns/xfrin.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/dns/xfrin.c b/lib/dns/xfrin.c
index 783b7d0dd1..feff048e9a 100644
--- a/lib/dns/xfrin.c
+++ b/lib/dns/xfrin.c
@@ -686,6 +686,9 @@ ixfr_commit(dns_xfrin_t *xfr) {
 	}
 
 cleanup:
+	if (result != ISC_R_SUCCESS) {
+		isc_mem_put(xfr->mctx, data, sizeof(*data));
+	}
 	return result;
 }