From 5153cdc35e816a2224da1dac0e4d316bf847473d Mon Sep 17 00:00:00 2001
From: Zhou Song <zhous@codeaurora.org>
Date: Tue, 22 Mar 2016 16:13:09 +0800
Subject: libmedia: Initialize mState/mActive value to avoid possible crash

If track creation fails on server side, mState/mActive is left
unitialized. After this a crash can happen when track stop()
is called because of a reference to a NULL object.
Initialize mState/mActive to specific value in initialized list
of track constructor.

Change-Id: If8c3611e3229c0c1b14b81285e07b9357fec7658
CRs-Fixed: 992608
---
 media/libmedia/AudioRecord.cpp | 6 +++---
 media/libmedia/AudioTrack.cpp  | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

(limited to 'media/libmedia')

diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index fc35a4c..40cad59 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -67,7 +67,7 @@ status_t AudioRecord::getMinFrameCount(
 // ---------------------------------------------------------------------------
 
 AudioRecord::AudioRecord(const String16 &opPackageName)
-    : mStatus(NO_INIT), mOpPackageName(opPackageName), mSessionId(AUDIO_SESSION_ALLOCATE),
+    : mActive(false), mStatus(NO_INIT), mOpPackageName(opPackageName), mSessionId(AUDIO_SESSION_ALLOCATE),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(SP_DEFAULT),
       mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
 {
@@ -89,7 +89,8 @@ AudioRecord::AudioRecord(
         int uid,
         pid_t pid,
         const audio_attributes_t* pAttributes)
-    : mStatus(NO_INIT),
+    : mActive(false),
+      mStatus(NO_INIT),
       mOpPackageName(opPackageName),
       mSessionId(AUDIO_SESSION_ALLOCATE),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
@@ -273,7 +274,6 @@ status_t AudioRecord::set(
     }
 
     mStatus = NO_ERROR;
-    mActive = false;
     mUserData = user;
     // TODO: add audio hardware input latency here
     if (mTransfer == TRANSFER_CALLBACK ||
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index d7256f8..ae016ef 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -165,6 +165,7 @@ status_t AudioTrack::getMinFrameCount(
 
 AudioTrack::AudioTrack()
     : mStatus(NO_INIT),
+      mState(STATE_STOPPED),
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
@@ -196,6 +197,7 @@ AudioTrack::AudioTrack(
         const audio_attributes_t* pAttributes,
         bool doNotReconnect)
     : mStatus(NO_INIT),
+      mState(STATE_STOPPED),
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
@@ -227,6 +229,7 @@ AudioTrack::AudioTrack(
         const audio_attributes_t* pAttributes,
         bool doNotReconnect)
     : mStatus(NO_INIT),
+      mState(STATE_STOPPED),
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
@@ -478,7 +481,6 @@ status_t AudioTrack::set(
     }
 
     mStatus = NO_ERROR;
-    mState = STATE_STOPPED;
     mUserData = user;
     mLoopCount = 0;
     mLoopStart = 0;
-- 
cgit v1.1