Check to make sure a structure pointer is non-NULL before touching it... crashing...

(closes issue #10831)
Reported by: eliel
Patches:
      chan_sip.c.patch uploaded by eliel (license 64)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@84176 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index c671b62bd2f6babe1bdc199cbeb70354d873438c..2bd516b8d7adb9b8ed8762133acfd413be32cb78 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -18912,7 +18912,7 @@ static char *sip_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a
                ast_verbose("Previous SIP reload not yet done\n");
        else {
                sip_reloading = TRUE;
-               sip_reloadreason = a->fd ? CHANNEL_CLI_RELOAD : CHANNEL_MODULE_RELOAD;
+               sip_reloadreason = (a && a->fd) ? CHANNEL_CLI_RELOAD : CHANNEL_MODULE_RELOAD;
        }
        ast_mutex_unlock(&sip_reload_lock);
        restart_monitor();