Make sure neither data_size nor sample_count is negative

diff --git a/libavformat/wav.c b/libavformat/wav.c
index 1832bc96606c4ffc4934269de3b689c73b110569..6b1e574a6efebcc1cfa1612c9ee564ed2d5741ff 100644 (file)
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -238,6 +238,12 @@ static int wav_read_header(AVFormatContext *s,
         avio_rl64(pb); /* RIFF size */
         data_size = avio_rl64(pb);
         sample_count = avio_rl64(pb);
+        if (data_size < 0 || sample_count < 0) {
+            av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
+                   "ds64: data_size = %li, sample_count = %li\n",
+                   data_size, sample_count);
+            return AVERROR_INVALIDDATA;
+        }
         avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
     }