We need to make sure we free the input frame if we return a different frame in ast_dsp_process.

Issue 11273, pointed out by dimas, with a patch by eliel.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@91890 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/dsp.c

@@ -1485,6 +1485,7 @@ struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp,
 	if ((dsp->features & DSP_FEATURE_SILENCE_SUPPRESS) && silence) {
 		memset(&dsp->f, 0, sizeof(dsp->f));
 		dsp->f.frametype = AST_FRAME_NULL;
+		ast_frfree(af);
 		return &dsp->f;
 	}
 	if ((dsp->features & DSP_FEATURE_BUSY_DETECT) && ast_dsp_busydetect(dsp)) {
@@ -1492,6 +1493,7 @@ struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp,
 		memset(&dsp->f, 0, sizeof(dsp->f));
 		dsp->f.frametype = AST_FRAME_CONTROL;
 		dsp->f.subclass = AST_CONTROL_BUSY;
+		ast_frfree(af);
 		ast_log(LOG_DEBUG, "Requesting Hangup because the busy tone was detected on channel %s\n", chan->name);
 		return &dsp->f;
 	}