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avformat/mpc8: fix broken pointer math 

This could overflow and crash at least on 32 bit systems.

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit b737a2c528)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
wm4 2015-02-03 19:04:11 +01:00 committed by Michael Niedermayer
parent 28f303542e
commit 55b75ece70
1 changed files with 1 additions and 1 deletions
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2
libavformat/mpc8.c
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@ -91,7 +91,7 @@ static int mpc8_probe(AVProbeData *p)
size = bs_get_v(&bs);
if (size < 2)
return 0;
if (bs + size - 2 >= bs_end)
if (size >= bs_end - bs + 2)
return AVPROBE_SCORE_EXTENSION - 1; // seems to be valid MPC but no header yet
if (header_found) {
if (size < 11 || size > 28)