From 4301f278298cf8746a39844ad92ddb8bc17247e3 Mon Sep 17 00:00:00 2001
From: inikep <inikep@gmail.com>
Date: Tue, 1 Dec 2015 10:57:03 +0100
Subject: [PATCH] memory leak fix (thanks to m^2)

---
 lib/lz5frame.c | 12 +++++++++---
 lib/lz5hc.c    | 14 ++++++++------
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/lib/lz5frame.c b/lib/lz5frame.c
index 0f88364..b81d0a6 100644
--- a/lib/lz5frame.c
+++ b/lib/lz5frame.c
@@ -335,7 +335,7 @@ size_t LZ5F_compressFrame(void* dstBuffer, size_t dstMaxSize, const void* srcBuf
     dstPtr += errorCode;
 
     if (prefs.compressionLevel >= (int)minHClevel)   /* no allocation necessary with lz5 fast */
-        FREEMEM(cctxI.lz5CtxPtr);
+        LZ5_freeStreamHC(cctxI.lz5CtxPtr);
 
     return (dstPtr - dstStart);
 }
@@ -375,7 +375,10 @@ LZ5F_errorCode_t LZ5F_freeCompressionContext(LZ5F_compressionContext_t LZ5F_comp
 
     if (cctxPtr != NULL)   /* null pointers can be safely provided to this function, like free() */
     {
-       FREEMEM(cctxPtr->lz5CtxPtr);
+        if (cctxPtr->prefs.compressionLevel < minHClevel)
+            FREEMEM(cctxPtr->lz5CtxPtr);
+        else
+            LZ5_freeStreamHC(cctxPtr->lz5CtxPtr);
        FREEMEM(cctxPtr->tmpBuff);
        FREEMEM(LZ5F_compressionContext);
     }
@@ -410,7 +413,10 @@ size_t LZ5F_compressBegin(LZ5F_compressionContext_t compressionContext, void* ds
         U32 tableID = (cctxPtr->prefs.compressionLevel < minHClevel) ? 1 : 2;  /* 0:nothing ; 1:LZ5 table ; 2:HC tables */
         if (cctxPtr->lz5CtxLevel < tableID)
         {
-            FREEMEM(cctxPtr->lz5CtxPtr);
+            if (cctxPtr->prefs.compressionLevel < minHClevel)
+                FREEMEM(cctxPtr->lz5CtxPtr);
+            else
+                LZ5_freeStreamHC(cctxPtr->lz5CtxPtr);
             if (cctxPtr->prefs.compressionLevel < minHClevel)
                 cctxPtr->lz5CtxPtr = (void*)LZ5_createStream();
             else
diff --git a/lib/lz5hc.c b/lib/lz5hc.c
index ffec5c1..de18f9b 100644
--- a/lib/lz5hc.c
+++ b/lib/lz5hc.c
@@ -75,10 +75,10 @@ int LZ5_alloc_mem_HC(LZ5HC_Data_Structure* ctx, int compressionLevel)
     return 1;
 }
 
-void LZ5_free_mem_HC(LZ5HC_Data_Structure* statePtr)
+void LZ5_free_mem_HC(LZ5HC_Data_Structure* ctx)
 {
-    if (statePtr->chainTable) FREEMEM(statePtr->chainTable);
-    if (statePtr->hashTable) FREEMEM(statePtr->hashTable);    
+    if (ctx->chainTable) FREEMEM(ctx->chainTable);
+    if (ctx->hashTable) FREEMEM(ctx->hashTable);    
 }
 
 
@@ -982,15 +982,17 @@ LZ5_streamHC_t* LZ5_createStreamHC(int compressionLevel)
         FREEMEM(statePtr);
         return NULL;
     }
-    
     return (LZ5_streamHC_t*) statePtr; 
 }
 
 int LZ5_freeStreamHC (LZ5_streamHC_t* LZ5_streamHCPtr)
 {
     LZ5HC_Data_Structure* statePtr = (LZ5HC_Data_Structure*)LZ5_streamHCPtr;
-    LZ5_free_mem_HC(statePtr);
-    free(LZ5_streamHCPtr); 
+    if (statePtr)
+    {
+        LZ5_free_mem_HC(statePtr);
+        free(LZ5_streamHCPtr); 
+    }
     return 0; 
 }