Fix a possible memory leak in sxnet_v2i

When a subsequent call to SXNET_add_id_asc fails
e.g. because user is a string larger than 64 char
or the zone is a duplicate zone id,
or the zone is not an integer,
a memory leak may be the result.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23234)

(cherry picked from commit 0151e772195fc03cce0f12e5e266e51dc15243a0)

diff --git a/crypto/x509/v3_sxnet.c b/crypto/x509/v3_sxnet.c
index 6128d5fc4a7221e90ed34fe308b2685e83046b45..56deece2fd01d40bfe830747387e966881203dfc 100644 (file)
--- a/crypto/x509/v3_sxnet.c
+++ b/crypto/x509/v3_sxnet.c
@@ -103,8 +103,10 @@ static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
     int i;
     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
         cnf = sk_CONF_VALUE_value(nval, i);
-        if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))
+        if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1)) {
+            SXNET_free(sx);
             return NULL;
+       }
     }
     return sx;
 }