[PATCH 0/1 v2] Fix no SEP if corresponding interface is disabled

[PATCH 0/1 v2] Fix no SEP if corresponding interface is disabled

[Dmitriy Paliy]

Hi,

Patch reworked wrt comments of Luiz provided in previous submission. Here
check is done on enabled A2DP interfaces in audio.conf configuration file.
If interface is not enabled then corresponding SEPs will not be created.

BR,
Dmitriy

[PATCH v2] Fix no SEP if corresponding interface is disabled

[Dmitriy Paliy]

A2DP sink endpoint shall not be created if A2DP sink interface is disabled.
Same holds for A2DP source endpoint and A2DP source interface.

Such fixes bluetoothd crash when SDP record is registered and remote
device tries to connect and stream to A2DP sink which is not initialized.
Dereferencing of NULL happens in source_new_stream since device->source
was not created.
---
 audio/a2dp.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/audio/a2dp.c b/audio/a2dp.c
index 012fce8..3407d6f 100644
--- a/audio/a2dp.c
+++ b/audio/a2dp.c
@@ -110,6 +110,8 @@ struct a2dp_server {
 	uint32_t source_record_id;
 	uint32_t sink_record_id;
 	uint16_t version;
+	gboolean sink_enabled;
+	gboolean source_enabled;
 };
 
 static GSList *servers = NULL;
@@ -1480,6 +1482,7 @@ proceed:
 	else
 		server->version = 0x0102;
 
+	server->source_enabled = source;
 	if (source) {
 		for (i = 0; i < sbc_srcs; i++)
 			a2dp_add_sep(src, AVDTP_SEP_TYPE_SOURCE,
@@ -1489,7 +1492,7 @@ proceed:
 			a2dp_add_sep(src, AVDTP_SEP_TYPE_SOURCE,
 					A2DP_CODEC_MPEG12, delay_reporting, NULL);
 	}
-
+	server->sink_enabled = sink;
 	if (sink) {
 		for (i = 0; i < sbc_sinks; i++)
 			a2dp_add_sep(src, AVDTP_SEP_TYPE_SINK,
@@ -1551,6 +1554,12 @@ struct a2dp_sep *a2dp_add_sep(const bdaddr_t *src, uint8_t type,
 	if (server == NULL)
 		return NULL;
 
+	if (type == AVDTP_SEP_TYPE_SINK && !server->sink_enabled)
+		return NULL;
+
+	if (type == AVDTP_SEP_TYPE_SOURCE && !server->source_enabled)
+		return NULL;
+
 	sep = g_new0(struct a2dp_sep, 1);
 
 	if (endpoint) {
-- 
1.7.1

Re: [PATCH v2] Fix no SEP if corresponding interface is disabled

[Luiz Augusto von Dentz]

Hi,

On Thu, Feb 17, 2011 at 11:31 AM, Dmitriy Paliy <dmitriy.paliy@nokia.com> wrote:
> A2DP sink endpoint shall not be created if A2DP sink interface is disabled.
> Same holds for A2DP source endpoint and A2DP source interface.
>
> Such fixes bluetoothd crash when SDP record is registered and remote
> device tries to connect and stream to A2DP sink which is not initialized.
> Dereferencing of NULL happens in source_new_stream since device->source
> was not created.
> ---
>  audio/a2dp.c |   11 ++++++++++-
>  1 files changed, 10 insertions(+), 1 deletions(-)
>
> diff --git a/audio/a2dp.c b/audio/a2dp.c
> index 012fce8..3407d6f 100644
> --- a/audio/a2dp.c
> +++ b/audio/a2dp.c
> @@ -110,6 +110,8 @@ struct a2dp_server {
>        uint32_t source_record_id;
>        uint32_t sink_record_id;
>        uint16_t version;
> +       gboolean sink_enabled;
> +       gboolean source_enabled;
>  };
>
>  static GSList *servers = NULL;
> @@ -1480,6 +1482,7 @@ proceed:
>        else
>                server->version = 0x0102;
>
> +       server->source_enabled = source;
>        if (source) {
>                for (i = 0; i < sbc_srcs; i++)
>                        a2dp_add_sep(src, AVDTP_SEP_TYPE_SOURCE,
> @@ -1489,7 +1492,7 @@ proceed:
>                        a2dp_add_sep(src, AVDTP_SEP_TYPE_SOURCE,
>                                        A2DP_CODEC_MPEG12, delay_reporting, NULL);
>        }
> -
> +       server->sink_enabled = sink;
>        if (sink) {
>                for (i = 0; i < sbc_sinks; i++)
>                        a2dp_add_sep(src, AVDTP_SEP_TYPE_SINK,
> @@ -1551,6 +1554,12 @@ struct a2dp_sep *a2dp_add_sep(const bdaddr_t *src, uint8_t type,
>        if (server == NULL)
>                return NULL;
>
> +       if (type == AVDTP_SEP_TYPE_SINK && !server->sink_enabled)
> +               return NULL;
> +
> +       if (type == AVDTP_SEP_TYPE_SOURCE && !server->source_enabled)
> +               return NULL;
> +
>        sep = g_new0(struct a2dp_sep, 1);
>
>        if (endpoint) {

Looks much better.

-- 
Luiz Augusto von Dentz
Computer Engineer

Re: [PATCH v2] Fix no SEP if corresponding interface is disabled

[Johan Hedberg]

Hi Dmitriy,

On Thu, Feb 17, 2011, Dmitriy Paliy wrote:
> A2DP sink endpoint shall not be created if A2DP sink interface is disabled.
> Same holds for A2DP source endpoint and A2DP source interface.
> 
> Such fixes bluetoothd crash when SDP record is registered and remote
> device tries to connect and stream to A2DP sink which is not initialized.
> Dereferencing of NULL happens in source_new_stream since device->source
> was not created.
> ---
>  audio/a2dp.c |   11 ++++++++++-
>  1 files changed, 10 insertions(+), 1 deletions(-)

Pushed upstream. Thanks.

Johan