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setopt: avoid integer overflows when setting millsecond values 

... that are multiplied by 1000 when stored.

For 32 bit long systems, the max value accepted (2147483 seconds) is >
596 hours which is unlikely to ever be set by a legitimate application -
and previously it didn't work either, it just caused undefined behavior.

Also updated the man pages for these timeout options to mention the
return code.

Closes #1938
This commit is contained in:
Daniel Stenberg 2017-10-03 17:00:18 +02:00
parent 4440b6ad57
commit 172ce9cc19
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
4 changed files with 26 additions and 10 deletions
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7
docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT.3
View File

@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@ -58,7 +58,8 @@ if(curl) {
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
Returns CURLE_OK. Returns CURLE_BAD_FUNCTION_ARGUMENT if set to a negative
value or a value that when converted to milliseconds is too large.
.SH "SEE ALSO"
.BR CURLOPT_CONNECTTIMEOUT_MS "(3), "
.BR CURLOPT_CONNECTTIMEOUT_MS "(3), "
.BR CURLOPT_TIMEOUT "(3), " CURLOPT_LOW_SPEED_LIMIT "(3), "

4
docs/libcurl/opts/CURLOPT_FTP_RESPONSE_TIMEOUT.3
View File

@ -54,7 +54,9 @@ if(curl) {
.SH AVAILABILITY
Added in 7.10.8
.SH RETURN VALUE
Returns CURLE_OK if FTP is supported, and CURLE_UNKNOWN_OPTION if not.
Returns CURLE_OK if FTP is supported, and CURLE_UNKNOWN_OPTION if not. Returns
CURLE_BAD_FUNCTION_ARGUMENT if set to a negative value or a value that when
converted to milliseconds is too large.
.SH "SEE ALSO"
.BR CURLOPT_TIMEOUT "(3), " CURLOPT_CONNECTTIMEOUT "(3), "
.BR CURLOPT_LOW_SPEED_LIMIT "(3), "

7
docs/libcurl/opts/CURLOPT_TIMEOUT.3
View File

@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@ -64,7 +64,8 @@ if(curl) {
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
Returns CURLE_OK. Returns CURLE_BAD_FUNCTION_ARGUMENT if set to a negative
value or a value that when converted to milliseconds is too large.
.SH "SEE ALSO"
.BR CURLOPT_TIMEOUT_MS "(3), "
.BR CURLOPT_TIMEOUT_MS "(3), "
.BR CURLOPT_CONNECTTIMEOUT "(3), " CURLOPT_LOW_SPEED_LIMIT "(3), "

18
lib/url.c
View File

@ -875,7 +875,11 @@ CURLcode Curl_setopt(struct Curl_easy *data, CURLoption option,
* Option that specifies how quickly an server response must be obtained
* before it is considered failure. For pingpong protocols.
*/
data->set.server_response_timeout = va_arg(param, long) * 1000;
arg = va_arg(param, long);
if((arg>=0) && (arg < (INT_MAX/1000)))
data->set.server_response_timeout = arg * 1000;
else
return CURLE_BAD_FUNCTION_ARGUMENT;
break;
case CURLOPT_TFTP_NO_OPTIONS:
/*
@ -1725,7 +1729,11 @@ CURLcode Curl_setopt(struct Curl_easy *data, CURLoption option,
* The maximum time you allow curl to use for a single transfer
* operation.
*/
data->set.timeout = va_arg(param, long) * 1000L;
arg = va_arg(param, long);
if((arg>=0) && (arg < (INT_MAX/1000)))
data->set.timeout = arg * 1000;
else
return CURLE_BAD_FUNCTION_ARGUMENT;
break;
case CURLOPT_TIMEOUT_MS:
@ -1736,7 +1744,11 @@ CURLcode Curl_setopt(struct Curl_easy *data, CURLoption option,
/*
* The maximum time you allow curl to use to connect.
*/
data->set.connecttimeout = va_arg(param, long) * 1000L;
arg = va_arg(param, long);
if((arg>=0) && (arg < (INT_MAX/1000)))
data->set.connecttimeout = arg * 1000;
else
return CURLE_BAD_FUNCTION_ARGUMENT;
break;
case CURLOPT_CONNECTTIMEOUT_MS: