From 336f9461df7d2005db9d1af4f5f81fd033025ce2 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 9 Nov 2019 21:21:51 +0100 Subject: [PATCH] avcodec/g729dec: Avoid using buf_size buf_size is not updated as buf is advanced so it is wrong after the first iteration Fixes: Timeout (160sec -> 27sec) Fixes: 18658/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G729_fuzzer-5729784269373440 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/g729dec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c index 70cf3391bd..5257be6e64 100644 --- a/libavcodec/g729dec.c +++ b/libavcodec/g729dec.c @@ -457,11 +457,11 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, buf++; } - for (i = 0; i < buf_size; i++) + for (i = 0; i < format->block_size; i++) frame_erasure |= buf[i]; frame_erasure = !frame_erasure; - init_get_bits(&gb, buf, 8*buf_size); + init_get_bits(&gb, buf, 8*format->block_size); ma_predictor = get_bits(&gb, 1); quantizer_1st = get_bits(&gb, VQ_1ST_BITS);