[Asterisk-code-review] channel.c: Fix segfault with Monitor(wav,file,i) (asterisk[13])

[Friendly Automation]

Friendly Automation has submitted this change and it was merged. ( https://gerrit.asterisk.org/10893 )

Change subject: channel.c: Fix segfault with Monitor(wav,file,i)
......................................................................

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
---
M main/channel.c
1 file changed, 2 insertions(+), 2 deletions(-)

Approvals:
  Joshua C. Colp: Looks good to me, but someone else must approve; Verified
  George Joseph: Looks good to me, but someone else must approve
  Sean Bright: Looks good to me, approved
  Friendly Automation: Approved for Submit



diff --git a/main/channel.c b/main/channel.c
index 74d7986..07b1521 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -5442,7 +5442,7 @@
 				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 @@
 #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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Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-MessageType: merged
Gerrit-Change-Id: I395b0975e4d38916cfbf65b4e91785450992307b
Gerrit-Change-Number: 10893
Gerrit-PatchSet: 2
Gerrit-Owner: Valentin Vidić <vvidic at valentin-vidic.from.hr>
Gerrit-Reviewer: Friendly Automation (1000185)
Gerrit-Reviewer: George Joseph <gjoseph at digium.com>
Gerrit-Reviewer: Joshua C. Colp <jcolp at digium.com>
Gerrit-Reviewer: Sean Bright <sean.bright at gmail.com>
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