From 0c61661a2cbe1b8b284c80ada1c2fdddf4992cad Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 27 Sep 2019 17:01:38 +0200 Subject: [PATCH] avcodec/g729postfilter: Fix undefined intermediate pointers Fixes: index -49 out of bounds for type 'int16_t [192]' Fixes: 17689/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ACELP_KELVIN_fuzzer-5756275014500352 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/g729postfilter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/g729postfilter.c b/libavcodec/g729postfilter.c index e8e031a1ed..ef4fec4c95 100644 --- a/libavcodec/g729postfilter.c +++ b/libavcodec/g729postfilter.c @@ -201,8 +201,8 @@ static int16_t long_term_filter(AudioDSPContext *adsp, int pitch_delay_int, } if (corr_int_num) { /* Compute denominator of pseudo-normalized correlation R'(0). */ - corr_int_den = adsp->scalarproduct_int16(sig_scaled - best_delay_int + RES_PREV_DATA_SIZE, - sig_scaled - best_delay_int + RES_PREV_DATA_SIZE, + corr_int_den = adsp->scalarproduct_int16(sig_scaled + RES_PREV_DATA_SIZE - best_delay_int, + sig_scaled + RES_PREV_DATA_SIZE - best_delay_int, subframe_size); /* Compute signals with non-integer delay k (with 1/8 precision),