ff_emulated_edge_mc: fix handling of w/h being 0

[ffmpeg] / libavcodec / adx.c

diff --git a/libavcodec/adx.c b/libavcodec/adx.c
index 1e5d89c991ad40bac44acb65d05065663c8d994c..7da696d0a8e9140236c58a41ba9ed88b652660ca 100644 (file)
--- a/libavcodec/adx.c
+++ b/libavcodec/adx.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/common.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "adx.h"
@@ -46,6 +47,11 @@ int avpriv_adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,
         return AVERROR_INVALIDDATA;
     offset = AV_RB16(buf + 2) + 4;
 
+    if (offset < 6) {
+        av_log(avctx, AV_LOG_ERROR, "offset is prior data\n");
+        return AVERROR_INVALIDDATA;
+    }
+
     /* if copyright string is within the provided data, validate it */
     if (bufsize >= offset && memcmp(buf + offset - 6, "(c)CRI", 6))
         return AVERROR_INVALIDDATA;