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malloc-fail: Add error check in htmlParseHTMLAttribute

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This function must return NULL is an error occurs.

Found by OSS-Fuzz, see #344.
This commit is contained in:
Nick Wellnhofer 2023-03-17 12:40:46 +01:00
parent c81d0d04bf
commit 62f199ed7d
1 changed files with 4 additions and 0 deletions
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4
HTMLparser.c
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@ -2844,6 +2844,10 @@ htmlParseHTMLAttribute(htmlParserCtxtPtr ctxt, const xmlChar stop) {
out = &buffer[indx];
}
c = CUR_CHAR(l);
if (ctxt->instate == XML_PARSER_EOF) {
xmlFree(buffer);
return(NULL);
}
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)