[FFmpeg-devel] [PATCH 01/36] avcodec/vp9_superframe_bsf: Check for existence of data before reading it

[Andreas Rheinhardt]

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
---
 libavcodec/vp9_superframe_bsf.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/vp9_superframe_bsf.c b/libavcodec/vp9_superframe_bsf.c
index 57681e29e4..34a47aa69e 100644
--- a/libavcodec/vp9_superframe_bsf.c
+++ b/libavcodec/vp9_superframe_bsf.c
@@ -108,6 +108,11 @@ static int vp9_superframe_filter(AVBSFContext *ctx, AVPacket *pkt)
     if (res < 0)
         return res;
 
+    if (pkt->size <= 0) {
+        res = AVERROR_INVALIDDATA;
+        goto done;
+    }
+
     marker = pkt->data[pkt->size - 1];
     if ((marker & 0xe0) == 0xc0) {
         int nbytes = 1 + ((marker >> 3) & 0x3);
-- 
2.20.1