From 69f0f5a93da0566faad6c436b5527283747dd81e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 18 Feb 2020 22:58:12 +0100 Subject: [PATCH] avcodec/qdm2: Check fft_coefs_index Fixes: out of array access Fixes: 20660/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDM2_fuzzer-5658290216501248 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer (cherry picked from commit 9fc73bf022eb781eea7f685e2d2e9de4ba8898ca) Signed-off-by: Michael Niedermayer --- libavcodec/qdm2.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c index 79a4738a3d..338bab5ebb 100644 --- a/libavcodec/qdm2.c +++ b/libavcodec/qdm2.c @@ -1332,6 +1332,9 @@ static void qdm2_fft_decode_tones(QDM2Context *q, int duration, if (q->frequency_range > (local_int_14 + 1)) { int sub_packet = (local_int_20 + local_int_28); + if (q->fft_coefs_index + stereo >= FF_ARRAY_ELEMS(q->fft_coefs)) + return; + qdm2_fft_init_coefficient(q, sub_packet, offset, duration, channel, exp, phase); if (stereo)