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h264_cabac: Break infinite loops

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This fixes out of array reads and/or infinite loops.

30 is the maximum number of bits that can be read into
coeff_abs below.

CC: libav-stable@libav.org
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Michael Niedermayer 2013-01-31 04:20:24 +01:00 committed by Vittorio Giovara
parent 51dd54c51a
commit d6deed7916
1 changed files with 1 additions and 1 deletions
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libavcodec/h264_cabac.c
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@ -1719,7 +1719,7 @@ decode_cabac_residual_internal(H264Context *h, DCTELEM *block,
\
if( coeff_abs >= 15 ) { \
int j = 0; \
while( get_cabac_bypass( CC ) ) { \
while (get_cabac_bypass(CC) && j < 30) { \
j++; \
} \
\