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Fixed GH-15547: curl_multi_wait expects a signed int for timeout. #15548

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Fixed GH-15547: curl_multi_wait expects a signed int for timeout. #15548

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03f880f
Fixed GH-15547: curl_multi_wait expects a signed int for timeout.
devnexen Aug 22, 2024
e8e7fcd
changes from feedback
devnexen Aug 23, 2024
5ecb5d9
setting curl multi error when it overflows
devnexen Aug 23, 2024
f6e6c71
fixing missing enum case
devnexen Aug 23, 2024
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10 changes: 9 additions & 1 deletion ext/curl/multi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -187,7 +187,15 @@ PHP_FUNCTION(curl_multi_select)

mh = Z_CURL_MULTI_P(z_mh);

error = curl_multi_wait(mh->multi, NULL, 0, (unsigned long) (timeout * 1000.0), &numfds);
if (!(timeout >= 0.0 && timeout <= ((double)INT_MAX / 1000.0))) {
php_error_docref(NULL, E_WARNING, "timeout must be between 0 and %d", (int)ceilf((double)INT_MAX / 1000));
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Sorry, the ceilf() is still not quite correct. Maybe we should actually output a float value? Or maybe leave as is, and call it a day. It's quite unlikely that a user specifies a timeout of almost a month.

#ifdef CURLM_BAD_FUNCTION_ARGUMENT
SAVE_CURLM_ERROR(mh, CURLM_BAD_FUNCTION_ARGUMENT);
#endif
RETURN_LONG(-1);
}

error = curl_multi_wait(mh->multi, NULL, 0, (int) (timeout * 1000.0), &numfds);
if (CURLM_OK != error) {
SAVE_CURLM_ERROR(mh, error);
RETURN_LONG(-1);
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29 changes: 29 additions & 0 deletions ext/curl/tests/gh15547.phpt
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@@ -0,0 +1,29 @@
--TEST--
GH-15547 - curl_multi_select overflow on timeout argument
--EXTENSIONS--
curl
--FILE--
<?php

$mh = curl_multi_init();
var_dump(curl_multi_select($mh, -2500000));
var_dump(curl_multi_strerror(curl_multi_errno($mh)));
curl_multi_close($mh);
$mh = curl_multi_init();
var_dump(curl_multi_select($mh, 2500000));
var_dump(curl_multi_strerror(curl_multi_errno($mh)));
curl_multi_close($mh);
$mh = curl_multi_init();
var_dump(curl_multi_select($mh, 1000000));
var_dump(curl_multi_strerror(curl_multi_errno($mh)));
?>
--EXPECTF--
Warning: curl_multi_select(): timeout must be between 0 and %d in %s on line %d
int(-1)
%s

Warning: curl_multi_select(): timeout must be between 0 and %d in %s on line %d
int(-1)
%s
int(0)
string(8) "No error"