res_pjsip_outbound_publish: Fix crash when publishing device state.

While publishing device state between multiple instances of Asterisk,
a crash will sporadically occur under high CPS which looks to be a
race condition operating on the publisher queue.

ASTERISK-26506

Change-Id: I28da25d346deb358eff1d563485cabc433ce1ed6

diff --git a/res/res_pjsip_outbound_publish.c b/res/res_pjsip_outbound_publish.c
index 0aad5fcdb643939e220b09fe9c1cb7e9308b78a8..87680480c8f172530bac85ec7ed10e9b443f703e 100644 (file)
--- a/res/res_pjsip_outbound_publish.c
+++ b/res/res_pjsip_outbound_publish.c
@@ -786,6 +786,7 @@ static int publisher_client_send(void *obj, void *arg, void *data, int flags)
        struct sip_outbound_publish_message *message;
        size_t type_len = 0, subtype_len = 0, body_text_len = 0;
        int *res = data;
+       SCOPED_AO2LOCK(lock, publisher);
 
        *res = -1;
        if (!publisher->client) {