generic-library/ffmpeg
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h264: check buffer size before accessing it

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Fixes invalid reads.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov
2013-11-15 10:15:24 +01:00
committed by Sean McGovern
parent fc53a09909
commit af40847681
1 changed files with 1 additions and 1 deletions
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libavcodec/h264.c
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@@ -3941,7 +3941,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
s->workaround_bugs |= FF_BUG_TRUNCATED; s->workaround_bugs |= FF_BUG_TRUNCATED;
if (!(s->workaround_bugs & FF_BUG_TRUNCATED)) if (!(s->workaround_bugs & FF_BUG_TRUNCATED))
while (ptr[dst_length - 1] == 0 && dst_length > 0) while (dst_length > 0 && ptr[dst_length - 1] == 0)
dst_length--; dst_length--;
bit_length = !dst_length ? 0 bit_length = !dst_length ? 0
: (8 * dst_length - : (8 * dst_length -