oggparseogm: check timing variables

Fixes a potential divide by zero. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC:[email protected]
SaschaVasarrhelyi · Jan 6, 2014 · 75647de · 75647de
1 parent 8058284
commit 75647de
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libavformat/oggparseogm.c b/libavformat/oggparseogm.c
@@ -75,6 +75,11 @@ ogm_header(AVFormatContext *s, int idx)
 
         time_unit   = bytestream2_get_le64(&p);
         spu         = bytestream2_get_le64(&p);
+        if (!time_unit || !spu) {
+            av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
+            return AVERROR_INVALIDDATA;
+        }
+
         bytestream2_skip(&p, 4);    /* default_len */
         bytestream2_skip(&p, 8);    /* buffersize + bits_per_sample */