avcodec/kgv1dec: Check that there is enough input for maximum RLE com…

…pression Fixes: Timeout Fixes: 4271/clusterfuzz-testcase-4676667768307712 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]>
gimletlabs · Nov 27, 2017 · 3aad94b · 3aad94b
1 parent 38f966b
commit 3aad94b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/libavcodec/kgv1dec.c b/libavcodec/kgv1dec.c
@@ -62,6 +62,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     h = (buf[1] + 1) * 8;
     buf += 2;
 
+    if (avpkt->size < 2 + w*h / 513)
+        return AVERROR_INVALIDDATA;
+
     if (w != avctx->width || h != avctx->height) {
         av_freep(&c->frame_buffer);
         av_freep(&c->last_frame_buffer);