Each file in this commit has a problem where it is possible to dereference

a pointer without that pointer being valid. This commit fixes each instance
of that.

3 files changed, 9 insertions, 4 deletions

diff --git a/core/multimedia/opieplayer/modplug/sndfile.cpp b/core/multimedia/opieplayer/modplug/sndfile.cpp
index 1d0d610..799555c 100644
--- a/core/multimedia/opieplayer/modplug/sndfile.cpp
+++ b/core/multimedia/opieplayer/modplug/sndfile.cpp
@@ -1730,25 +1730,28 @@ void CSoundFile::CheckCPUUsage(UINT nCPU)
 	if (nCPU > 90)
 	{
 		m_dwSongFlags |= SONG_CPUVERYHIGH;
 	}
 }
 
 
 BOOL CSoundFile::SetPatternName(UINT nPat, LPCSTR lpszName)
 //---------------------------------------------------------
 {
         char szName[MAX_PATTERNNAME] = "";   // changed from CHAR
 	if (nPat >= MAX_PATTERNS) return FALSE;
-	if (lpszName) lstrcpyn(szName, lpszName, MAX_PATTERNNAME);
+	if (lpszName)
+		lstrcpyn(szName, lpszName, MAX_PATTERNNAME);
+	else
+		return FALSE;
 	szName[MAX_PATTERNNAME-1] = 0;
 	if (!m_lpszPatternNames) m_nPatternNames = 0;
 	if (nPat >= m_nPatternNames)
 	{
 		if (!lpszName[0]) return TRUE;
 		UINT len = (nPat+1)*MAX_PATTERNNAME;
 		char *p = new char[len];   // changed from CHAR
 		if (!p) return FALSE;
 		memset(p, 0, len);
 		if (m_lpszPatternNames)
 		{
 			memcpy(p, m_lpszPatternNames, m_nPatternNames * MAX_PATTERNNAME);
diff --git a/core/multimedia/opieplayer/vorbis/tremor/block.c b/core/multimedia/opieplayer/vorbis/tremor/block.c
index 8949253..7b5531b 100644
--- a/core/multimedia/opieplayer/vorbis/tremor/block.c
+++ b/core/multimedia/opieplayer/vorbis/tremor/block.c
@@ -217,26 +217,28 @@ int vorbis_synthesis_init(vorbis_dsp_state *v,vorbis_info *vi){
 
   return(0);
 }
 
 void vorbis_dsp_clear(vorbis_dsp_state *v){
   int i;
   if(v){
     vorbis_info *vi=v->vi;
     codec_setup_info *ci=(codec_setup_info *)(vi?vi->codec_setup:NULL);
     private_state *b=(private_state *)v->backend_state;
 
     if(v->pcm){
-      for(i=0;i<vi->channels;i++)
-	if(v->pcm[i])_ogg_free(v->pcm[i]);
+      if (vi) {
+	for(i=0;i<vi->channels;i++)
+	  if(v->pcm[i])_ogg_free(v->pcm[i]);
+      }
       _ogg_free(v->pcm);
       if(v->pcmret)_ogg_free(v->pcmret);
     }
 
     /* free mode lookups; these are actually vorbis_look_mapping structs */
     if(ci){
       for(i=0;i<ci->modes;i++){
 	int mapnum=ci->mode_param[i]->mapping;
 	int maptype=ci->map_type[mapnum];
 	if(b && b->mode)_mapping_P[maptype]->free_look(b->mode[i]);
       }
     }
diff --git a/core/multimedia/opieplayer/vorbis/tremor/info.c b/core/multimedia/opieplayer/vorbis/tremor/info.c
index 941695e..3499ae4 100644
--- a/core/multimedia/opieplayer/vorbis/tremor/info.c
+++ b/core/multimedia/opieplayer/vorbis/tremor/info.c
@@ -88,26 +88,26 @@ int vorbis_comment_query_count(vorbis_comment *vc, char *tag){
 
   return count;
 }
 
 void vorbis_comment_clear(vorbis_comment *vc){
   if(vc){
     long i;
     for(i=0;i<vc->comments;i++)
       if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
     if(vc->user_comments)_ogg_free(vc->user_comments);
 	if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
     if(vc->vendor)_ogg_free(vc->vendor);
+    memset(vc,0,sizeof(*vc));
   }
-  memset(vc,0,sizeof(*vc));
 }
 
 /* blocksize 0 is guaranteed to be short, 1 is guarantted to be long.
    They may be equal, but short will never ge greater than long */
 int vorbis_info_blocksize(vorbis_info *vi,int zo){
   codec_setup_info *ci = (codec_setup_info *)vi->codec_setup;
   return ci ? ci->blocksizes[zo] : -1;
 }
 
 /* used by synthesis, which has a full, alloced vi */
 void vorbis_info_init(vorbis_info *vi){
   memset(vi,0,sizeof(*vi));