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ffmdec: fix hypothetical overflows

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Fixes CID703739
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-17 20:36:30 +02:00
parent 71bc8c95d7
commit a0e0e1e192
1 changed files with 2 additions and 2 deletions
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4
libavformat/ffmdec.c
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@ -111,8 +111,8 @@ static int ffm_read_data(AVFormatContext *s,
if (ffm->first_packet || (frame_offset & 0x8000)) {
if (!frame_offset) {
/* This packet has no frame headers in it */
if (avio_tell(pb) >= ffm->packet_size * 3) {
avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
if (avio_tell(pb) >= ffm->packet_size * 3LL) {
avio_seek(pb, -ffm->packet_size * 2LL, SEEK_CUR);
goto retry_read;
}
/* This is bad, we cannot find a valid frame header */