wavpack: check the blocks sample count, fix out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <[email protected]>
SaschaVasarrhelyi · Nov 13, 2012 · d8a1eb1 · d8a1eb1
1 parent 580021c
commit d8a1eb1
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
@@ -806,6 +806,10 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
             *got_frame_ptr = 0;
             return 0;
         }
+        if (s->samples > wc->samples) {
+            av_log(avctx, AV_LOG_ERROR, "too many samples in block");
+            return -1;
+        }
     } else {
         s->samples = wc->samples;
     }