ffmpeg | branch: release/3.3 | Michael Niedermayer <mich...@niedermayer.cc> | Fri Aug 4 02:41:05 2017 +0200| [1dbfcd65b26d93d4beaca0c0fc60c31092e555bc] | committer: Michael Niedermayer
avcodec/h264_slice: Fix overflow in slice offset Fixes: runtime error: signed integer overflow: 1610612736 * 2 cannot be represented in type 'int' Fixes: 2817/clusterfuzz-testcase-minimized-5289691240726528 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 1f53bde6d817ae13a47748f321adbdfa79e15982) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1dbfcd65b26d93d4beaca0c0fc60c31092e555bc --- libavcodec/h264_slice.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c index 86b72dff7f..3f3a3e4067 100644 --- a/libavcodec/h264_slice.c +++ b/libavcodec/h264_slice.c @@ -1835,17 +1835,19 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl, sl->deblocking_filter ^= 1; // 1<->0 if (sl->deblocking_filter) { - sl->slice_alpha_c0_offset = get_se_golomb(&sl->gb) * 2; - sl->slice_beta_offset = get_se_golomb(&sl->gb) * 2; - if (sl->slice_alpha_c0_offset > 12 || - sl->slice_alpha_c0_offset < -12 || - sl->slice_beta_offset > 12 || - sl->slice_beta_offset < -12) { + int slice_alpha_c0_offset_div2 = get_se_golomb(&sl->gb); + int slice_beta_offset_div2 = get_se_golomb(&sl->gb); + if (slice_alpha_c0_offset_div2 > 6 || + slice_alpha_c0_offset_div2 < -6 || + slice_beta_offset_div2 > 6 || + slice_beta_offset_div2 < -6) { av_log(h->avctx, AV_LOG_ERROR, "deblocking filter parameters %d %d out of range\n", - sl->slice_alpha_c0_offset, sl->slice_beta_offset); + slice_alpha_c0_offset_div2, slice_beta_offset_div2); return AVERROR_INVALIDDATA; } + sl->slice_alpha_c0_offset = slice_alpha_c0_offset_div2 * 2; + sl->slice_beta_offset = slice_beta_offset_div2 * 2; } } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
