commit cb7a572b3e7f568f1ebc8d91b1b8826a8ce3baa8
author Xiaoming Ni <nixiaoming@huawei.com> Mon Dec 07 20:17:34 2020 +0800
committer Nick Wellnhofer <wellnhofer@aevum.de> Mon Dec 07 14:37:55 2020 +0100
tree ffa3dbc80a0a3cd24cb7f082b515b15690931af2
parent 84b76d99f1faea5babe057e4db50135ff53cc7fb

xmlschemastypes.c: xmlSchemaGetFacetValueAsULong add, check "facet->val"

The xmlSchemaGetFacetValueAsUlong() API is an external API.
The validity of external input parameters must be strictly verified.
Before accessing "facet->val->value", we need check whether "facet->val" is
a null pointer.

Signed-off-by: wuqing <wuqing30@huawei.com>
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>

xmlschemastypes.c

diff --git a/xmlschemastypes.c b/xmlschemastypes.c
index d6b9f92..07b5fd7 100644
--- a/xmlschemastypes.c
+++ b/xmlschemastypes.c
@@ -5142,7 +5142,7 @@
     /*
     * TODO: Check if this is a decimal.
     */
-    if (facet == NULL)
+    if (facet == NULL || facet->val == NULL)
         return 0;
     return ((unsigned long) facet->val->value.decimal.lo);
 }