[pschweitzer] 62632: [MMEBUDDY] Fix use after free. CID #716804

Author: pschweitzer
Date: Sat Apr  5 21:08:10 2014
New Revision: 62632

URL: http://svn.reactos.org/svn/reactos?rev=62632&view=rev
Log:
[MMEBUDDY]
Fix use after free.

CID #716804

Modified:
    trunk/reactos/lib/drivers/sound/mmebuddy/deviceinstance.c

Modified: trunk/reactos/lib/drivers/sound/mmebuddy/deviceinstance.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/sound/mmebuddy/...
==============================================================================
--- trunk/reactos/lib/drivers/sound/mmebuddy/deviceinstance.c	[iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/sound/mmebuddy/deviceinstance.c	[iso-8859-1] Sat Apr  5 21:08:10 2014
@@ -306,15 +306,16 @@
     IN  PSOUND_DEVICE SoundDevice)
 {
     MMRESULT Result;
-    PSOUND_DEVICE_INSTANCE SoundDeviceInstance;
+    PSOUND_DEVICE_INSTANCE SoundDeviceInstance, NextDeviceInstance;

SoundDeviceInstance = SoundDevice->HeadInstance;

while ( SoundDeviceInstance )
     {
+        NextDeviceInstance = SoundDeviceInstance->Next;
         Result = DestroySoundDeviceInstance(SoundDeviceInstance);
         SND_ASSERT( MMSUCCESS(Result) );
-        SoundDeviceInstance = SoundDeviceInstance->Next;
+        SoundDeviceInstance = NextDeviceInstance;
     }

return MMSYSERR_NOERROR;