Fix potential segfault (bug #3479)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4942 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_meetme.c b/apps/app_meetme.c
index a5c81b6..6f003f7 100755 (executable)
--- a/apps/app_meetme.c
+++ b/apps/app_meetme.c
@@ -755,7 +755,7 @@ zapretry:
        ztc.confno = conf->zapconf;
        ast_mutex_lock(&conflock);
        if (!(confflags & CONFFLAG_QUIET) && (confflags & CONFFLAG_INTROUSER) && conf->users > 1) {
-               if (ast_fileexists(user->namerecloc, NULL, NULL)) {
+               if (conf->chan && ast_fileexists(user->namerecloc, NULL, NULL)) {
                        if (!ast_streamfile(conf->chan, user->namerecloc, chan->language))
                                ast_waitstream(conf->chan, "");
                        if (!ast_streamfile(conf->chan, "conf-hasjoin", chan->language))
@@ -1109,7 +1109,7 @@ zapretry:
                conf_play(conf, LEAVE);
 
        if (!(confflags & CONFFLAG_QUIET) && (confflags & CONFFLAG_INTROUSER) && conf->users > 1) {
-               if (ast_fileexists(user->namerecloc, NULL, NULL)) {
+               if (conf->chan && ast_fileexists(user->namerecloc, NULL, NULL)) {
                        if (!ast_streamfile(conf->chan, user->namerecloc, chan->language))
                                ast_waitstream(conf->chan, "");
                        if (!ast_streamfile(conf->chan, "conf-hasleft", chan->language))
@@ -1719,6 +1719,9 @@ static void *recordthread(void *args)
        int res=0;
 
        cnf = (struct ast_conference *)args;
+       if( !cnf || !cnf->chan ) {
+               pthread_exit(0);
+       }
        ast_stopstream(cnf->chan);
        flags = O_CREAT|O_TRUNC|O_WRONLY;
        s = ast_writefile(cnf->recordingfilename, cnf->recordingformat, NULL, flags, 0, 0644);