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Fix memory leak when curl_slist_append() fails #18711

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Fix memory leak when curl_slist_append() fails #18711

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6 changes: 4 additions & 2 deletions ext/curl/interface.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2220,12 +2220,14 @@ static zend_result _php_curl_setopt(php_curl *ch, zend_long option, zval *zvalue
ZEND_HASH_FOREACH_VAL(ph, current) {
ZVAL_DEREF(current);
val = zval_get_tmp_string(current, &tmp_val);
slist = curl_slist_append(slist, ZSTR_VAL(val));
struct curl_slist *new_slist = curl_slist_append(slist, ZSTR_VAL(val));
zend_tmp_string_release(tmp_val);
if (!slist) {
if (!new_slist) {
curl_slist_free_all(slist);
php_error_docref(NULL, E_WARNING, "Could not build curl_slist");
return FAILURE;
}
slist = new_slist;
} ZEND_HASH_FOREACH_END();

if (slist) {
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