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avformat/ty: check cur_chunk_pos before using it

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Fixes #6831.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-11-12 22:57:06 +01:00
parent a38b14a432
commit f38d0d0c22
1 changed files with 2 additions and 0 deletions
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2
libavformat/ty.c
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@ -378,6 +378,8 @@ static void parse_master(AVFormatContext *s)
ty->cur_chunk_pos = 32; ty->cur_chunk_pos = 32;
for (j = 0; j < ty->seq_table_size; j++) { for (j = 0; j < ty->seq_table_size; j++) {
if (ty->cur_chunk_pos >= CHUNK_SIZE - 8)
return;
ty->seq_table[j].timestamp = AV_RB64(ty->chunk + ty->cur_chunk_pos); ty->seq_table[j].timestamp = AV_RB64(ty->chunk + ty->cur_chunk_pos);
ty->cur_chunk_pos += 8; ty->cur_chunk_pos += 8;
if (map_size > 8) { if (map_size > 8) {