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ext/intl: Fix use-after-free in grapheme_stripos ASCII fast-path #21189

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ext/intl: Fix use-after-free in grapheme_stripos ASCII fast-path #21189

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8 changes: 5 additions & 3 deletions ext/intl/grapheme/grapheme_string.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -180,13 +180,15 @@ U_CFUNC PHP_FUNCTION(grapheme_stripos)

found = php_memnstr(haystack_dup + noffset, needle_dup, needle_len, haystack_dup + haystack_len);

efree(haystack_dup);
efree(needle_dup);

if (found) {
RETURN_LONG(found - haystack_dup);
ret_pos = found - haystack_dup;
efree(haystack_dup);
RETURN_LONG(ret_pos);
}


efree(haystack_dup);
/* if needle was ascii too, we are all done, otherwise we need to try using Unicode to see what we get */
if ( grapheme_ascii_check((unsigned char *)needle, needle_len) >= 0 ) {
RETURN_FALSE;
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