diff options
| author | russell <russell@f38db490-d61c-443f-a65b-d21fe96a405b> | 2007-08-17 21:01:43 +0000 |
|---|---|---|
| committer | russell <russell@f38db490-d61c-443f-a65b-d21fe96a405b> | 2007-08-17 21:01:43 +0000 |
| commit | 5ce9a719de199ead11519342f4e77ab2e1bd466d (patch) | |
| tree | b8095b170f1ca22e42691cbe8e952786debaca0f /channels/chan_zap.c | |
| parent | d8b9ecad9e603ec76ad50d47356e966db46a0c52 (diff) | |
Avoid a crash in the handling of DTMF based Caller ID. It is valid for
ast_read to return NULL in the case that the channel has been hung up.
(crash reported by anonymouz666 on IRC in #asterisk-dev)
git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@79912 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'channels/chan_zap.c')
| -rw-r--r-- | channels/chan_zap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/channels/chan_zap.c b/channels/chan_zap.c index d20596dbd..6c0967081 100644 --- a/channels/chan_zap.c +++ b/channels/chan_zap.c @@ -6111,6 +6111,8 @@ static void *ss_thread(void *data) return NULL; } f = ast_read(chan); + if (!f) + break; if (f->frametype == AST_FRAME_DTMF) { dtmfbuf[i++] = f->subclass; ast_log(LOG_DEBUG, "CID got digit '%c'\n", f->subclass); |