X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavcodec%2Fxan.c;h=bccbe24d85b7489c18f14c463abf52a882adef24;hb=52066bdb300b3a2cdef48897d0c864410b259084;hp=f11f1bf0625d50029b27d3c2100728ddb9570e98;hpb=dcb0d1193a3de3711bdb410c1fe3f70cc5143603;p=ffmpeg

diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index f11f1bf0625..bccbe24d85b 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -33,12 +33,11 @@
 #include <string.h>
 
 #include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
 #include "avcodec.h"
 #include "bytestream.h"
 #define BITSTREAM_READER_LE
 #include "get_bits.h"
-// for av_memcpy_backptr
-#include "libavutil/lzo.h"
 
 #define RUNTIME_GAMMA 0
 
@@ -360,17 +359,29 @@ static int xan_wc3_decode_frame(XanContext *s) {
 
         case 9:
         case 19:
+            if (buf_end - size_segment < 1) {
+                av_log(s->avctx, AV_LOG_ERROR, "size_segment overread\n");
+                return AVERROR_INVALIDDATA;
+            }
             size = *size_segment++;
             break;
 
         case 10:
         case 20:
+            if (buf_end - size_segment < 2) {
+                av_log(s->avctx, AV_LOG_ERROR, "size_segment overread\n");
+                return AVERROR_INVALIDDATA;
+            }
             size = AV_RB16(&size_segment[0]);
             size_segment += 2;
             break;
 
         case 11:
         case 21:
+            if (buf_end - size_segment < 3) {
+                av_log(s->avctx, AV_LOG_ERROR, "size_segment overread\n");
+                return AVERROR_INVALIDDATA;
+            }
             size = AV_RB24(size_segment);
             size_segment += 3;
             break;