Fix possible crash on AVDTP Suspend req timeout

This fixes possible bluetoothd crash on AVDTP Suspend request timeout
if A2DP client was destroyed after the request was sent but before its
timeout handled.

If Suspend request times out due to any reason, then references to A2DP
session and stream are cleared in unix_client. Therefore, callback cannot
be removed when unix_client is destroyed (e.g. on incomming call).

After that, consequent Abort request is sent. If the request times out
as well, than stream_state_changed callback is invoked to change AVDTP
state to Idle, which causes crash due to NULL dereferencing.

Therefore, it is important to keep references to AVDTP session and stream
in unix_client until it is destroyed.
1 file changed