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Curl_socket_check: add extra check to avoid integer overflow

This commit is contained in:
Daniel Stenberg 2016-10-18 09:45:34 +02:00
parent d18c546454
commit 9aa2afc3a5
1 changed files with 6 additions and 0 deletions
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6
lib/select.c
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@ -165,6 +165,12 @@ int Curl_socket_check(curl_socket_t readfd0, /* two sockets to read from */
int r;
int ret;
#if SIZEOF_LONG != SIZEOF_INT
/* wrap-around precaution */
if(timeout_ms >= INT_MAX)
timeout_ms = INT_MAX;
#endif
if((readfd0 == CURL_SOCKET_BAD) && (readfd1 == CURL_SOCKET_BAD) &&
(writefd == CURL_SOCKET_BAD)) {
/* no sockets, just wait */