diff options
| -rw-r--r-- | libavcodec/xan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/xan.c b/libavcodec/xan.c index cfaca81e16..155dee9595 100644 --- a/libavcodec/xan.c +++ b/libavcodec/xan.c @@ -288,6 +288,7 @@ static int xan_wc3_decode_frame(XanContext *s) { const unsigned char *size_segment; const unsigned char *vector_segment; const unsigned char *imagedata_segment; + const unsigned char *buf_end = s->buf + s->size; int huffman_offset, size_offset, vector_offset, imagedata_offset, imagedata_size; @@ -392,6 +393,10 @@ static int xan_wc3_decode_frame(XanContext *s) { imagedata_size -= size; } } else { + if (vector_segment >= buf_end) { + av_log(s->avctx, AV_LOG_ERROR, "vector_segment overread\n"); + return AVERROR_INVALIDDATA; + } /* run-based motion compensation from last frame */ motion_x = sign_extend(*vector_segment >> 4, 4); motion_y = sign_extend(*vector_segment & 0xF, 4); |