LZ4F_compressFrame : fix potential crash on selecting custom preferences

frame fuzzer tests : new random tests using LZ4F_compressFrame

2 files changed, 9 insertions, 1 deletions

diff --git a/lz4frame.c b/lz4frame.c
index 9209191..47ad655 100644
--- a/lz4frame.c
+++ b/lz4frame.c
@@ -262,7 +262,7 @@ size_t LZ4F_compressFrame(void* dstBuffer, size_t dstMaxSize, const void* srcBuf
 
 
     cctxI.version = LZ4F_VERSION;
-    cctxI.maxBufferSize = 64 KB;   /* mess with real buffer size to prevent allocation; works because autoflush==1 & stableSrc==1 */
+    cctxI.maxBufferSize = 5 MB;   /* mess with real buffer size to prevent allocation; works because autoflush==1 & stableSrc==1 */
 
     if (preferencesPtr!=NULL) prefs = *preferencesPtr;
     {
diff --git a/programs/frametest.c b/programs/frametest.c
index 03b47e8..aa1a727 100644
--- a/programs/frametest.c
+++ b/programs/frametest.c
@@ -426,6 +426,14 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
         DISPLAYUPDATE(2, "\r%5i   ", testNb);
         crcOrig = XXH64((BYTE*)srcBuffer+srcStart, srcSize, 1);
 
+        if ((FUZ_rand(&randState)&0xF) == 2)
+        {
+            LZ4F_preferences_t* framePrefs = &prefs;
+            if ((FUZ_rand(&randState)&7) == 1) framePrefs = NULL;
+            cSize = LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(srcSize, framePrefs), srcBuffer + srcStart, srcSize, framePrefs);
+            CHECK(LZ4F_isError(cSize), "LZ4F_compressFrame failed : error %i (%s)", (int)cSize, LZ4F_getErrorName(cSize));
+        }
+        else
         {
             const BYTE* ip = (const BYTE*)srcBuffer + srcStart;
             const BYTE* const iend = ip + srcSize;