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
@@ -1739,7 +1739,10 @@ 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)
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
@@ -226,8 +226,10 @@ void vorbis_dsp_clear(vorbis_dsp_state *v){
     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);
     }
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
@@ -97,8 +97,8 @@ void vorbis_comment_clear(vorbis_comment *vc){
     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.