From 03ffda7b88da5a37c9c31478494b8768da50a008 Mon Sep 17 00:00:00 2001 From: Igor Sugak Date: Wed, 8 Jan 2020 16:17:42 -0800 Subject: [PATCH] fix UBSAN's invalid-null-argument error in zstd_decompress.c (#1939) --- lib/decompress/zstd_decompress.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/decompress/zstd_decompress.c b/lib/decompress/zstd_decompress.c index d4d42e794..9e6ab216d 100644 --- a/lib/decompress/zstd_decompress.c +++ b/lib/decompress/zstd_decompress.c @@ -1482,7 +1482,9 @@ size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize) MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize) { size_t const length = MIN(dstCapacity, srcSize); - memcpy(dst, src, length); + if (length > 0) { + memcpy(dst, src, length); + } return length; }