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parser: fix large overreads

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

(cherry picked from commit 096abfa150)

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2012-10-03 16:06:23 +02:00 committed by Reinhard Tartler
parent 799000af70
commit 9c713f30e4
1 changed files with 3 additions and 1 deletions
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4
libavcodec/parser.c
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@ -261,7 +261,9 @@ int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_s
if(!new_buffer)
return AVERROR(ENOMEM);
pc->buffer = new_buffer;
memcpy(&pc->buffer[pc->index], *buf, next + FF_INPUT_BUFFER_PADDING_SIZE );
if (next > -FF_INPUT_BUFFER_PADDING_SIZE)
memcpy(&pc->buffer[pc->index], *buf,
next + FF_INPUT_BUFFER_PADDING_SIZE);
pc->index = 0;
*buf= pc->buffer;
}