As second argument for init_get_bits (buf) can be crafted, return value check 
for this function call is necessary.
'buf' is  part of  'AVPacket pkt'.

---
 libavformat/adtsenc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavformat/adtsenc.c b/libavformat/adtsenc.c
index ba15c0a724..b660618432 100644
--- a/libavformat/adtsenc.c
+++ b/libavformat/adtsenc.c
@@ -53,9 +53,11 @@ static int adts_decode_extradata(AVFormatContext *s, 
ADTSContext *adts, const ui
     GetBitContext gb;
     PutBitContext pb;
     MPEG4AudioConfig m4ac;
-    int off;
+    int off, ret;
 
-    init_get_bits(&gb, buf, size * 8);
+    ret = init_get_bits(&gb, buf, size * 8);
+    if (ret < 0)
+        return ret;
     off = avpriv_mpeg4audio_get_config2(&m4ac, buf, size, 1, s);
     if (off < 0)
         return off;
-- 
2.17.1

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