From 588114cea4ee434c9c61353ed91ffc817d2965f5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 5 Apr 2020 00:11:15 +0200 Subject: [PATCH] avcodec/cbs_h265_syntax_template: Check num_negative/positive_pics when inter_ref_pic_set_prediction_flag is set Fixes: out of array access Fixes: 20446/clusterfuzz-testcase-minimized-ffmpeg_BSF_HEVC_METADATA_fuzzer-5707770718584832 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/cbs_h265_syntax_template.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/cbs_h265_syntax_template.c b/libavcodec/cbs_h265_syntax_template.c index 180a045c34..5f5531944c 100644 --- a/libavcodec/cbs_h265_syntax_template.c +++ b/libavcodec/cbs_h265_syntax_template.c @@ -601,6 +601,8 @@ static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw, } } + if (i > 15) + return AVERROR_INVALIDDATA; infer(num_negative_pics, i); for (i = 0; i < current->num_negative_pics; i++) { infer(delta_poc_s0_minus1[i], @@ -630,6 +632,8 @@ static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw, } } + if (i + current->num_negative_pics > 15) + return AVERROR_INVALIDDATA; infer(num_positive_pics, i); for (i = 0; i < current->num_positive_pics; i++) { infer(delta_poc_s1_minus1[i],