diff --git a/main/channel.c b/main/channel.c index 902c79d853e4d0fae962d82b3f7fc0d628510fee..f4a04d52f348b334614ed1780a4a6f3727fed5c7 100644 --- a/main/channel.c +++ b/main/channel.c @@ -6518,10 +6518,18 @@ int ast_do_masquerade(struct ast_channel *original) * for deadlock avoidance will not result in any sort of masquerade race condition. * If masq is called by a different thread while this happens, it will be stuck waiting * until we unlock the container. */ - while (ast_channel_trylock(clonechan)) { + while ((clonechan = original->masq) && ast_channel_trylock(clonechan)) { CHANNEL_DEADLOCK_AVOIDANCE(original); } + /* recheck if masq has been done the deadlock avoidance above could cause a double masq + * this is posible with at least ast_hangup*/ + if (!original->masq) { + ast_channel_unlock(original); + ao2_unlock(channels); + return 0; /* masq already completed by another thread, or never needed to be done to begin with */ + } + /* Get any transfer masquerade connected line exchange data. */ xfer_ds = ast_channel_datastore_find(original, &xfer_ds_info, NULL); if (xfer_ds) {