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avcodec/h264dec: check number of SPS in is_extra

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Zhao Zhili 2018-09-06 17:15:11 +08:00 committed by Michael Niedermayer
parent 9f60c58586
commit b9d1f5bf68
1 changed files with 2 additions and 0 deletions
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libavcodec/h264dec.c
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@ -855,6 +855,8 @@ static int is_extra(const uint8_t *buf, int buf_size)
{ {
int cnt= buf[5]&0x1f; int cnt= buf[5]&0x1f;
const uint8_t *p= buf+6; const uint8_t *p= buf+6;
if (!cnt)
return 0;
while(cnt--){ while(cnt--){
int nalsize= AV_RB16(p) + 2; int nalsize= AV_RB16(p) + 2;
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7) if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)