From 75a3e39288feeeefde5ed1f96ff9faeba0d2b233 Mon Sep 17 00:00:00 2001
From: Matt Caswell <matt@openssl.org>
Date: Tue, 2 May 2017 13:47:31 +0100
Subject: [PATCH] Fix some error path logic in i2v_AUTHORITY_INFO_ACCESS and
 i2v_GENERAL_NAME

Fixes #1653 reported by Guido Vranken

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3362)
---
 crypto/x509v3/v3_alt.c  | 32 +++++++++++++++++++++-----------
 crypto/x509v3/v3_info.c | 37 ++++++++++++++++++++++---------------
 2 files changed, 43 insertions(+), 26 deletions(-)

diff --git a/crypto/x509v3/v3_alt.c b/crypto/x509v3/v3_alt.c
index 3062250d17..35afcb13e0 100644
--- a/crypto/x509v3/v3_alt.c
+++ b/crypto/x509v3/v3_alt.c
@@ -70,32 +70,39 @@ STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
     int i;
     switch (gen->type) {
     case GEN_OTHERNAME:
-        X509V3_add_value("othername", "<unsupported>", &ret);
+        if (!X509V3_add_value("othername", "<unsupported>", &ret))
+            return NULL;
         break;
 
     case GEN_X400:
-        X509V3_add_value("X400Name", "<unsupported>", &ret);
+        if (!X509V3_add_value("X400Name", "<unsupported>", &ret))
+            return NULL;
         break;
 
     case GEN_EDIPARTY:
-        X509V3_add_value("EdiPartyName", "<unsupported>", &ret);
+        if (!X509V3_add_value("EdiPartyName", "<unsupported>", &ret))
+            return NULL;
         break;
 
     case GEN_EMAIL:
-        X509V3_add_value_uchar("email", gen->d.ia5->data, &ret);
+        if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret))
+            return NULL;
         break;
 
     case GEN_DNS:
-        X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret);
+        if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret))
+            return NULL;
         break;
 
     case GEN_URI:
-        X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret);
+        if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret))
+            return NULL;
         break;
 
     case GEN_DIRNAME:
-        X509_NAME_oneline(gen->d.dirn, oline, 256);
-        X509V3_add_value("DirName", oline, &ret);
+        if (X509_NAME_oneline(gen->d.dirn, oline, 256) == NULL
+                || !X509V3_add_value("DirName", oline, &ret))
+            return NULL;
         break;
 
     case GEN_IPADD:
@@ -113,15 +120,18 @@ STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
                     strcat(oline, ":");
             }
         } else {
-            X509V3_add_value("IP Address", "<invalid>", &ret);
+            if (!X509V3_add_value("IP Address", "<invalid>", &ret))
+                return NULL;
             break;
         }
-        X509V3_add_value("IP Address", oline, &ret);
+        if (!X509V3_add_value("IP Address", oline, &ret))
+            return NULL;
         break;
 
     case GEN_RID:
         i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
-        X509V3_add_value("Registered ID", oline, &ret);
+        if (!X509V3_add_value("Registered ID", oline, &ret))
+            return NULL;
         break;
     }
     return ret;
diff --git a/crypto/x509v3/v3_info.c b/crypto/x509v3/v3_info.c
index 61ef2138b7..c29c7e2af6 100644
--- a/crypto/x509v3/v3_info.c
+++ b/crypto/x509v3/v3_info.c
@@ -58,29 +58,30 @@ ASN1_ITEM_TEMPLATE_END(AUTHORITY_INFO_ACCESS)
 
 IMPLEMENT_ASN1_FUNCTIONS(AUTHORITY_INFO_ACCESS)
 
-static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_INFO_ACCESS(X509V3_EXT_METHOD
-                                                       *method, AUTHORITY_INFO_ACCESS
-                                                       *ainfo, STACK_OF(CONF_VALUE)
-                                                       *ret)
+static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_INFO_ACCESS(
+    X509V3_EXT_METHOD *method, AUTHORITY_INFO_ACCESS *ainfo,
+    STACK_OF(CONF_VALUE) *ret)
 {
     ACCESS_DESCRIPTION *desc;
     int i, nlen;
     char objtmp[80], *ntmp;
     CONF_VALUE *vtmp;
+    STACK_OF(CONF_VALUE) *tret = ret;
+
     for (i = 0; i < sk_ACCESS_DESCRIPTION_num(ainfo); i++) {
+        STACK_OF(CONF_VALUE) *tmp;
+
         desc = sk_ACCESS_DESCRIPTION_value(ainfo, i);
-        ret = i2v_GENERAL_NAME(method, desc->location, ret);
-        if (!ret)
-            break;
-        vtmp = sk_CONF_VALUE_value(ret, i);
+        tmp = i2v_GENERAL_NAME(method, desc->location, tret);
+        if (tmp == NULL)
+            goto err;
+        tret = tmp;
+        vtmp = sk_CONF_VALUE_value(tret, i);
         i2t_ASN1_OBJECT(objtmp, sizeof objtmp, desc->method);
         nlen = strlen(objtmp) + strlen(vtmp->name) + 5;
         ntmp = OPENSSL_malloc(nlen);
-        if (ntmp == NULL) {
-            X509V3err(X509V3_F_I2V_AUTHORITY_INFO_ACCESS,
-                      ERR_R_MALLOC_FAILURE);
-            return NULL;
-        }
+        if (ntmp == NULL)
+            goto err;
         OPENSSL_strlcpy(ntmp, objtmp, nlen);
         OPENSSL_strlcat(ntmp, " - ", nlen);
         OPENSSL_strlcat(ntmp, vtmp->name, nlen);
@@ -88,9 +89,15 @@ static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_INFO_ACCESS(X509V3_EXT_METHOD
         vtmp->name = ntmp;
 
     }
-    if (!ret)
+    if (ret == NULL && tret == NULL)
         return sk_CONF_VALUE_new_null();
-    return ret;
+
+    return tret;
+ err:
+    X509V3err(X509V3_F_I2V_AUTHORITY_INFO_ACCESS, ERR_R_MALLOC_FAILURE);
+    if (ret == NULL && tret != NULL)
+        sk_CONF_VALUE_pop_free(tret, X509V3_conf_free);
+    return NULL;
 }
 
 static AUTHORITY_INFO_ACCESS *v2i_AUTHORITY_INFO_ACCESS(X509V3_EXT_METHOD
-- 
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