Audit improper usage of scheduler exposed by 5c713fdf18.

channels/chan_iax2.c:
* Initialize struct chan_iax2_pvt scheduler ids earlier because of
iax2_destroy_helper().

channels/chan_sip.c:
channels/sip/config_parser.c:
* Fix initialization of scheduler id struct members.  Some off nominal
paths had 0 as a scheduler id to be destroyed when it was never started.

chan_skinny.c:
* Fix some scheduler id comparisons that excluded the valid 0 id.

channel.c:
* Fix channel initialization of the video stream scheduler id.

pbx_dundi.c:
* Fix channel initialization of the packet retransmission scheduler id.

ASTERISK-25476

Change-Id: I07a3449f728f671d326a22fcbd071f150ba2e8c8

channels/chan_iax2.c

@@ -2136,25 +2136,26 @@ static struct chan_iax2_pvt *new_iax(struct sockaddr_in *sin, const char *host)
 		return NULL;
 	}
 
-	if (ast_string_field_init(tmp, 32)) {
-		ao2_ref(tmp, -1);
-		tmp = NULL;
-		return NULL;
-	}
-		
-	tmp->prefs = prefs;
 	tmp->pingid = -1;
 	tmp->lagid = -1;
 	tmp->autoid = -1;
 	tmp->authid = -1;
 	tmp->initid = -1;
 	tmp->keyrotateid = -1;
+	tmp->jbid = -1;
+
+	if (ast_string_field_init(tmp, 32)) {
+		ao2_ref(tmp, -1);
+		tmp = NULL;
+		return NULL;
+	}
+
+	tmp->prefs = prefs;
 
 	ast_string_field_set(tmp,exten, "s");
 	ast_string_field_set(tmp,host, host);
 
 	tmp->jb = jb_new();
-	tmp->jbid = -1;
 	jbconf.max_jitterbuf = maxjitterbuffer;
 	jbconf.resync_threshold = resyncthreshold;
 	jbconf.max_contig_interp = maxjitterinterps;

channels/chan_sip.c

@@ -1069,6 +1069,7 @@ static int publish_expire(const void *data)
 	ast_assert(esc != NULL);
 
 	ao2_unlink(esc->compositor, esc_entry);
+	esc_entry->sched_id = -1;
 	ao2_ref(esc_entry, -1);
 	return 0;
 }
@@ -1101,6 +1102,11 @@ static struct sip_esc_entry *create_esc_entry(struct event_state_compositor *esc
 	/* Bump refcount for scheduler */
 	ao2_ref(esc_entry, +1);
 	esc_entry->sched_id = ast_sched_add(sched, expires_ms, publish_expire, esc_entry);
+	if (esc_entry->sched_id == -1) {
+		ao2_ref(esc_entry, -1);
+		ao2_ref(esc_entry, -1);
+		return NULL;
+	}
 
 	/* Note: This links the esc_entry into the ESC properly */
 	create_new_sip_etag(esc_entry, 0);

channels/chan_skinny.c

@@ -4379,7 +4379,7 @@ static int skinny_call(struct ast_channel *ast, const char *dest, int timeout)
 
 	AST_LIST_TRAVERSE(ast_channel_varshead(ast), current, entries) {
 		if (!(strcasecmp(ast_var_name(current),"SKINNY_AUTOANSWER"))) {
-			if (d->hookstate == SKINNY_ONHOOK && !(sub->aa_sched < 0)) {
+			if (d->hookstate == SKINNY_ONHOOK && sub->aa_sched < 0) {
 				char buf[24];
 				int aatime;
 				char *stringp = buf, *curstr;
@@ -4981,12 +4981,12 @@ static void setsubstate(struct skinny_subchannel *sub, int state)
 		return;
 	}
 
-	if (sub->dialer_sched) {
+	if (-1 < sub->dialer_sched) {
 		skinny_sched_del(sub->dialer_sched, sub);
 		sub->dialer_sched = -1;
 	}
 
-	if (state != SUBSTATE_RINGIN && sub->aa_sched) {
+	if (state != SUBSTATE_RINGIN && -1 < sub->aa_sched) {
 		skinny_sched_del(sub->aa_sched, sub);
 		sub->aa_sched = -1;
 		sub->aa_beep = 0;
@@ -5640,7 +5640,7 @@ static int handle_keypad_button_message(struct skinny_req *req, struct skinnyses
 	}
 
 	if ((sub->owner && ast_channel_state(sub->owner) <  AST_STATE_UP)) {
-		if (sub->dialer_sched &&	!skinny_sched_del(sub->dialer_sched, sub)) {
+		if (-1 < sub->dialer_sched && !skinny_sched_del(sub->dialer_sched, sub)) {
 			SKINNY_DEBUG(DEBUG_SUB, 3, "Sub %u - Got a digit and not timed out, so try dialing\n", sub->callid);
 			sub->dialer_sched = -1;
 			len = strlen(sub->exten);
@@ -6524,7 +6524,7 @@ static int handle_soft_key_event_message(struct skinny_req *req, struct skinnyse
 	case SOFTKEY_BKSPC:
 		SKINNY_DEBUG(DEBUG_PACKET, 3, "Received SOFTKEY_BKSPC from %s, inst %d, callref %d\n",
 			d->name, instance, callreference);
-		if (sub->dialer_sched && !skinny_sched_del(sub->dialer_sched, sub)) {
+		if (-1 < sub->dialer_sched && !skinny_sched_del(sub->dialer_sched, sub)) {
 			size_t len;
 			sub->dialer_sched = -1;
 			len = strlen(sub->exten);

channels/sip/config_parser.c

@@ -79,13 +79,17 @@ int sip_parse_register_line(struct sip_registry *reg, int default_expiry, const
 		AST_APP_ARG(port);
 	);
 
-	if (!value) {
+	if (!reg) {
 		return -1;
 	}
 
-	if (!reg) {
+	reg->expire = -1;
+	reg->timeout = -1;
+
+	if (!value) {
 		return -1;
 	}
+
 	ast_copy_string(buf, value, sizeof(buf));
 
 	/*! register => [peer?][transport://]user[@domain][:secret[:authuser]]@host[:port][/extension][~expiry]
@@ -261,7 +265,6 @@ int sip_parse_register_line(struct sip_registry *reg, int default_expiry, const
 	ast_string_field_set(reg, regdomain, ast_strip_quoted(S_OR(user2.domain, ""), "\"", "\""));
 
 	reg->transport = transport;
-	reg->timeout = reg->expire = -1;
 	reg->portno = portnum;
 	reg->regdomainport = domainport;
 	reg->callid_valid = FALSE;

main/channel.c

@@ -1049,6 +1049,7 @@ __ast_channel_alloc_ap(int needqueue, int state, const char *cid_num, const char
 	ast_channel_state_set(tmp, state);
 
 	ast_channel_streamid_set(tmp, -1);
+	ast_channel_vstreamid_set(tmp, -1);
 
 	ast_channel_fin_set(tmp, global_fin);
 	ast_channel_fout_set(tmp, global_fout);

pbx/pbx_dundi.c

@@ -3255,6 +3255,7 @@ static int dundi_send(struct dundi_transaction *trans, int cmdresp, int flags, i
 	pack = ast_calloc(1, len);
 	if (pack) {
 		pack->h = (struct dundi_hdr *)(pack->data);
+		pack->retransid = -1;
 		if (cmdresp != DUNDI_COMMAND_ACK) {
 			pack->retransid = ast_sched_add(sched, trans->retranstimer, dundi_rexmit, pack);
 			pack->retrans = DUNDI_DEFAULT_RETRANS - 1;