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malloc-fail: Fix null deref in xmlAddDefAttrs

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Found with libFuzzer, see #344.
This commit is contained in:
Nick Wellnhofer 2023-01-22 16:52:39 +01:00
parent 2355eac59e
commit bd9de3a31f
1 changed files with 2 additions and 0 deletions
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2
parser.c
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@ -1274,6 +1274,8 @@ xmlAddDefAttrs(xmlParserCtxtPtr ctxt,
/* intern the string and precompute the end */ /* intern the string and precompute the end */
len = xmlStrlen(value); len = xmlStrlen(value);
value = xmlDictLookup(ctxt->dict, value, len); value = xmlDictLookup(ctxt->dict, value, len);
if (value == NULL)
goto mem_error;
defaults->values[5 * defaults->nbAttrs + 2] = value; defaults->values[5 * defaults->nbAttrs + 2] = value;
defaults->values[5 * defaults->nbAttrs + 3] = value + len; defaults->values[5 * defaults->nbAttrs + 3] = value + len;
if (ctxt->external) if (ctxt->external)