From efde1ab1385b4831313c20c227924e0a6ecb3208 Mon Sep 17 00:00:00 2001
From: Valentin Vidic <vvidic@valentin-vidic.from.hr>
Date: Sun, 20 Jan 2019 19:15:51 +0100
Subject: [PATCH] channel.c: Fix segfault with Monitor(wav,file,i)
If the Monitor is started with the i option the read_stream will be
NULL. One code path in channel.c checks if write_stream is set but than
uses read_stream instead causing a segfault.
ASTERISK-28249
Change-Id: I1bae9126537be54895c7fea2d08dd9488d8cc525
---
main/channel.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/main/channel.c b/main/channel.c
index 74d7986454..07b15212a8 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -5442,7 +5442,7 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
if (jump >= 0) {
jump = calc_monitor_jump((ast_channel_insmpl(chan) - ast_channel_outsmpl(chan)),
ast_format_get_sample_rate(f->subclass.format),
- ast_format_get_sample_rate(ast_channel_monitor(chan)->read_stream->fmt->format));
+ ast_format_get_sample_rate(ast_channel_monitor(chan)->write_stream->fmt->format));
if (ast_seekstream(ast_channel_monitor(chan)->write_stream, jump, SEEK_FORCECUR) == -1) {
ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
}
@@ -5453,7 +5453,7 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
#else
int jump = calc_monitor_jump((ast_channel_insmpl(chan) - ast_channel_outsmpl(chan)),
ast_format_get_sample_rate(f->subclass.format),
- ast_format_get_sample_rate(ast_channel_monitor(chan)->read_stream->fmt->format));
+ ast_format_get_sample_rate(ast_channel_monitor(chan)->write_stream->fmt->format));
if (jump - MONITOR_DELAY >= 0) {
if (ast_seekstream(ast_channel_monitor(chan)->write_stream, jump - cur->samples, SEEK_FORCECUR) == -1) {
ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
--
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