X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Flzo.c;h=364230810024ae0d710895115691edb606099da6;hb=b5a69e79c579e6e15e2019ffd34ef0e09aeab586;hp=b3c69cf0c5332a0c42c036fb4b0251e6c7724082;hpb=28dff061767727ecf98335fe2814c06297723fde;p=ffmpeg

diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index b3c69cf0c53..36423081002 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -112,7 +112,7 @@ static inline void memcpy_backptr(uint8_t *dst, int back, int cnt);
 
 /**
  * @brief Copies previously decoded bytes to current position.
- * @param back how many bytes back we start
+ * @param back how many bytes back we start, must be > 0
  * @param cnt number of bytes to copy, must be >= 0
  *
  * cnt > back is valid, this will copy the bytes we just copied,
@@ -135,7 +135,7 @@ static inline void copy_backptr(LZOContext *c, int back, int cnt) {
 
 static inline void memcpy_backptr(uint8_t *dst, int back, int cnt) {
     const uint8_t *src = &dst[-back];
-    if (back == 1) {
+    if (back <= 1) {
         memset(dst, *src, cnt);
     } else {
 #ifdef OUTBUF_PADDED