res_musiconhold.c: Release any format refs before memset().

* Clear the channel music_state pointer before destroying the music_state
object for safety.
........

Merged revisions 422037 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@422038 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_musiconhold.c b/res/res_musiconhold.c
index 00a2fa2..cbeaab5 100644 (file)
--- a/res/res_musiconhold.c
+++ b/res/res_musiconhold.c
@@ -479,6 +479,8 @@ static void *moh_files_alloc(struct ast_channel *chan, void *params)
        /* Resume MOH from where we left off last time or start from scratch? */
        if (state->save_total != class->total_files || strcmp(state->name, class->name) != 0) {
                /* Start MOH from scratch. */
+               ao2_cleanup(state->origwfmt);
+               ao2_cleanup(state->mohwfmt);
                memset(state, 0, sizeof(*state));
                if (ast_test_flag(class, MOH_RANDOMIZE) && class->total_files) {
                        state->pos = ast_random() % class->total_files;
@@ -974,6 +976,8 @@ static void *moh_alloc(struct ast_channel *chan, void *params)
                        mohclass_unref(state->class, "Uh Oh. Restarting MOH with an active class");
                        ast_log(LOG_WARNING, "Uh Oh. Restarting MOH with an active class\n");
                }
+               ao2_cleanup(state->origwfmt);
+               ao2_cleanup(state->mohwfmt);
                memset(state, 0, sizeof(*state));
        }
 
@@ -1304,6 +1308,7 @@ static void local_ast_moh_cleanup(struct ast_channel *chan)
        struct moh_files_state *state = ast_channel_music_state(chan);
 
        if (state) {
+               ast_channel_music_state_set(chan, NULL);
                if (state->class) {
                        /* This should never happen.  We likely just leaked some resource. */
                        state->class =
@@ -1312,8 +1317,7 @@ static void local_ast_moh_cleanup(struct ast_channel *chan)
                }
                ao2_cleanup(state->origwfmt);
                ao2_cleanup(state->mohwfmt);
-               ast_free(ast_channel_music_state(chan));
-               ast_channel_music_state_set(chan, NULL);
+               ast_free(state);
                /* Only held a module reference if we had a music state */
                ast_module_unref(ast_module_info->self);
        }