diff options
| -rw-r--r-- | lib/lz4frame.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/lz4frame.c b/lib/lz4frame.c index ebd1089..488ab75 100644 --- a/lib/lz4frame.c +++ b/lib/lz4frame.c @@ -1631,7 +1631,8 @@ size_t LZ4F_decompress(LZ4F_dctx* dctx, if (dctx->tmpOutSize > 64 KB) copySize = 0; if (copySize > preserveSize) copySize = preserveSize; - memcpy(dctx->tmpOutBuffer + preserveSize - copySize, oldDictEnd - copySize, copySize); + if (copySize > 0) + memcpy(dctx->tmpOutBuffer + preserveSize - copySize, oldDictEnd - copySize, copySize); dctx->dict = dctx->tmpOutBuffer; dctx->dictSize = preserveSize + dctx->tmpOutStart; @@ -1639,7 +1640,8 @@ size_t LZ4F_decompress(LZ4F_dctx* dctx, const BYTE* const oldDictEnd = dctx->dict + dctx->dictSize; size_t const newDictSize = MIN(dctx->dictSize, 64 KB); - memcpy(dctx->tmpOutBuffer, oldDictEnd - newDictSize, newDictSize); + if (newDictSize > 0) + memcpy(dctx->tmpOutBuffer, oldDictEnd - newDictSize, newDictSize); dctx->dict = dctx->tmpOutBuffer; dctx->dictSize = newDictSize; |