ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Jul 24 15:48:37 2017 +0200| [58ce199abac4f990d6c80b2be7192965e0d20ef6] | committer: Michael Niedermayer
avcodec/hevc_ps: fix integer overflow in log2_parallel_merge_level_minus2 Fixes: runtime error: signed integer overflow: -2147483647 - 2 cannot be represented in type 'int' Fixes: 2702/clusterfuzz-testcase-minimized-4511932591636480 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 74c1c22d7f0d25f527ed2ebf62493be5ad52c972) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=58ce199abac4f990d6c80b2be7192965e0d20ef6 --- libavcodec/hevc_ps.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index dcb1f7d27f..bb0d51929b 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -1394,6 +1394,7 @@ int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx, HEVCSPS *sps = NULL; int i, ret = 0; unsigned int pps_id = 0; + unsigned log2_parallel_merge_level_minus2; AVBufferRef *pps_buf; HEVCPPS *pps = av_mallocz(sizeof(*pps)); @@ -1580,13 +1581,14 @@ int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx, goto err; } pps->lists_modification_present_flag = get_bits1(gb); - pps->log2_parallel_merge_level = get_ue_golomb_long(gb) + 2; - if (pps->log2_parallel_merge_level > sps->log2_ctb_size) { + log2_parallel_merge_level_minus2 = get_ue_golomb_long(gb); + if (log2_parallel_merge_level_minus2 > sps->log2_ctb_size) { av_log(avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n", - pps->log2_parallel_merge_level - 2); + log2_parallel_merge_level_minus2); ret = AVERROR_INVALIDDATA; goto err; } + pps->log2_parallel_merge_level = log2_parallel_merge_level_minus2 + 2; pps->slice_header_extension_present_flag = get_bits1(gb); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
