---
libavcodec/h264dec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
index bffce52..6f7530d 100644
--- a/libavcodec/h264dec.c
+++ b/libavcodec/h264dec.c
@@ -871,6 +871,8 @@ static int is_extra(const uint8_t *buf, int buf_size)
{
int cnt= buf[5]&0x1f;
const uint8_t *p= buf+6;
+ if (!cnt)
+ return 0;
while(cnt--){
int nalsize= AV_RB16(p) + 2;
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
--
2.9.5
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