From: Matt Caswell <matt@openssl.org>
Date: Tue, 26 Jun 2018 14:12:56 +0000 (+0100)
Subject: Check a return value for success in ec_field_size()
X-Git-Tag: OpenSSL_1_1_1-pre9~184
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=bdd92f4d9bce6c62e553f89a2556c6881fc6d5dd;hp=1829ff4b5e7f1d1570ea9b9e4660a1a673e5da67

Check a return value for success in ec_field_size()

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6592)
---

diff --git a/crypto/sm2/sm2_crypt.c b/crypto/sm2/sm2_crypt.c
index f2470609f9..aedf9054c1 100644
--- a/crypto/sm2/sm2_crypt.c
+++ b/crypto/sm2/sm2_crypt.c
@@ -48,7 +48,8 @@ static size_t ec_field_size(const EC_GROUP *group)
     if (p == NULL || a == NULL || b == NULL)
        goto done;
 
-    EC_GROUP_get_curve_GFp(group, p, a, b, NULL);
+    if (!EC_GROUP_get_curve_GFp(group, p, a, b, NULL))
+        goto done;
     field_size = (BN_num_bits(p) + 7) / 8;
 
  done: