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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-12-02 20:36:32 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-12-02 20:44:58 +0100 |
| commit | 936eaa89be5de0eada9d188777427b97e568422a (patch) | |
| tree | bfadfb5957b0296a941baede58abe0fffa082a93 /libavcodec | |
| parent | 2cb227f6a2a0aa04da8fbcfd4c7a6069c0cb4c36 (diff) | |
| download | ffmpeg-936eaa89be5de0eada9d188777427b97e568422a.tar.gz | |
h264: check for integer overflow, fix null pointer dereference
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/h264.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index abed3649f9..b07c3cb143 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -4010,6 +4010,8 @@ again: "SPS decoding failure, trying again with the complete NAL\n"); if (h->is_avc) av_assert0(next_avc - buf_index + consumed == nalsize); + if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8) + break; init_get_bits(&s->gb, &buf[buf_index + 1 - consumed], 8*(next_avc - buf_index + consumed - 1)); ff_h264_decode_seq_parameter_set(h); |