Use poll() instead of select() in res_timing_pthread to avoid stack corruption.

This code did not properly check FD_SETSIZE to ensure that it did not try to
select() on fds that were too large.  Switching to poll() removes the limitation
on the maximum fd value.

(closes issue #15915)
Reported by: keiron

(closes issue #17187)
Reported by: Eddie Edwards

(closes issue #16494)
Reported by: Hubguru

(closes issue #15731)
Reported by: flop

(closes issue #12917)
Reported by: falves11

(closes issue #14920)
Reported by: vrban

(closes issue #17199)
Reported by: aleksey2000

(closes issue #15406)
Reported by: kowalma

(closes issue #17438)
Reported by: dcabot

(closes issue #17325)
Reported by: glwgoes

(closes issue #17118)
Reported by: erikje

possibly other issues, too ...

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@278465 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_timing_pthread.c b/res/res_timing_pthread.c
index d63b39d1fc6f98a4f037c5f40f3b303dc3d068aa..8cb2898d9ef3820dc1e1dc78afbcaee79d6df636 100644 (file)
--- a/res/res_timing_pthread.c
+++ b/res/res_timing_pthread.c
@@ -36,6 +36,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$");
 #include "asterisk/astobj2.h"
 #include "asterisk/time.h"
 #include "asterisk/lock.h"
+#include "asterisk/poll-compat.h"
 
 static void *timing_funcs_handle;
 
@@ -376,16 +377,12 @@ static void read_pipe(struct pthread_timer *timer, unsigned int quantity)
        do {
                unsigned char buf[1024];
                ssize_t res;
-               fd_set rfds;
-               struct timeval timeout = {
-                       .tv_sec = 0,
+               struct pollfd pfd = {
+                       .fd = rd_fd,
+                       .events = POLLIN,
                };
 
-               /* Make sure there is data to read */
-               FD_ZERO(&rfds);
-               FD_SET(rd_fd, &rfds);
-
-               if (select(rd_fd + 1, &rfds, NULL, NULL, &timeout) != 1) {
+               if (ast_poll(&pfd, 1, 0) != 1) {
                        ast_debug(1, "Reading not available on timing pipe, "
                                        "quantity: %u\n", quantity);
                        break;