ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Fri Dec 18 23:05:22 2020 +0100| [f1700bd8bb983bb3b56c3a1f8b9078cb62a44f65] | committer: Michael Niedermayer
avcodec/hevc_ps: check scaling_list_dc_coef Fixes: signed integer overflow: 2147483640 + 8 cannot be represented in type 'int' Fixes: 28449/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5686013259284480 Reviewed-by: James Almer <[email protected]> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f1700bd8bb983bb3b56c3a1f8b9078cb62a44f65 --- libavcodec/hevc_ps.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index ea6fd536c6..139f3deeda 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -816,7 +816,11 @@ static int scaling_list_data(GetBitContext *gb, AVCodecContext *avctx, ScalingLi next_coef = 8; coef_num = FFMIN(64, 1 << (4 + (size_id << 1))); if (size_id > 1) { - scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8; + int scaling_list_coeff_minus8 = get_se_golomb(gb); + if (scaling_list_coeff_minus8 < -7 || + scaling_list_coeff_minus8 > 247) + return AVERROR_INVALIDDATA; + scaling_list_dc_coef[size_id - 2][matrix_id] = scaling_list_coeff_minus8 + 8; next_coef = scaling_list_dc_coef[size_id - 2][matrix_id]; sl->sl_dc[size_id - 2][matrix_id] = next_coef; } _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
