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

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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>
This commit is contained in:
Xiaoming Ni 2020-12-07 20:17:34 +08:00 committed by Nick Wellnhofer
parent 84b76d99f1
commit cb7a572b3e
1 changed files with 1 additions and 1 deletions
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xmlschemastypes.c
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@ -5142,7 +5142,7 @@ xmlSchemaGetFacetValueAsULong(xmlSchemaFacetPtr facet)
/*
* 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);
}