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avcodec/jpeg2000dec: Handle Psot = 0

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Fixes Ticket2869

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-09 14:43:03 +02:00
parent e60b018c74
commit b6ee1912f9
1 changed files with 3 additions and 0 deletions
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libavcodec/jpeg2000dec.c
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@ -602,6 +602,9 @@ static int get_sot(Jpeg2000DecoderContext *s, int n)
/* Read TNSot but not used */
bytestream2_get_byteu(&s->g); // TNsot
if (!Psot)
Psot = bytestream2_get_bytes_left(&s->g) + n + 2;
if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
av_log(s->avctx, AV_LOG_ERROR, "Psot %"PRIu32" too big\n", Psot);
return AVERROR_INVALIDDATA;