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shorten: allocate space for padding

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Fixes array overread

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 89d998f1c1)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2013-05-07 19:57:10 +02:00
parent 2b26f8c6bf
commit ca7f64e0ac
1 changed files with 1 additions and 1 deletions
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libavcodec/shorten.c
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@@ -424,7 +424,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data,
void *tmp_ptr;
s->max_framesize = 8192; // should hopefully be enough for the first header
tmp_ptr = av_fast_realloc(s->bitstream, &s->allocated_bitstream_size,
s->max_framesize);
s->max_framesize + FF_INPUT_BUFFER_PADDING_SIZE);
if (!tmp_ptr) {
av_log(avctx, AV_LOG_ERROR, "error allocating bitstream buffer\n");
return AVERROR(ENOMEM);