Avoid a double-free in an error path.

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 1549a265209d449b6aefd2b49d7d39f7fbe0689b)

diff --git a/crypto/dh/dh_ameth.c b/crypto/dh/dh_ameth.c
index a8349e7370a3d75ce8e5fe8bde5eb0cec260ecdd..533080aeeb7aac1eda56c8d3edca6bdd6c001f39 100644 (file)
--- a/crypto/dh/dh_ameth.c
+++ b/crypto/dh/dh_ameth.c
@@ -283,6 +283,7 @@ static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
     dplen = i2d_ASN1_INTEGER(prkey, &dp);
 
     ASN1_INTEGER_free(prkey);
+    prkey = NULL;
 
     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
                          V_ASN1_SEQUENCE, params, dp, dplen))