Fixes: signed integer overflow: -2147483648 + -1 cannot be represented in type 'int' Fixes: 14444/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5675880333967360
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/h264_ps.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c index 7c92c68b38..e38cf2a533 100644 --- a/libavcodec/h264_ps.c +++ b/libavcodec/h264_ps.c @@ -451,6 +451,15 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, sps->delta_pic_order_always_zero_flag = get_bits1(gb); sps->offset_for_non_ref_pic = get_se_golomb_long(gb); sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb); + + if ( sps->offset_for_non_ref_pic == INT32_MIN + || sps->offset_for_top_to_bottom_field == INT32_MIN + ) { + av_log(avctx, AV_LOG_ERROR, + "offset_for_non_ref_pic or offset_for_top_to_bottom_field underflow\n"); + goto fail; + } + sps->poc_cycle_length = get_ue_golomb(gb); if ((unsigned)sps->poc_cycle_length >= -- 2.21.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
