From d909d8e5e0fbce42ecb10ee6e73def1f1e42ece4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 15 Dec 2023 02:18:04 +0100 Subject: [PATCH] avcodec/leaddec: Check remaining bits in decode_block() Fixes: Timeout Fixes: 64163/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LEAD_fuzzer-6418925835124736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/leaddec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/leaddec.c b/libavcodec/leaddec.c index ede52fba5a..4e97479b03 100644 --- a/libavcodec/leaddec.c +++ b/libavcodec/leaddec.c @@ -104,6 +104,9 @@ static int decode_block(LeadContext * s, GetBitContext * gb, s->bdsp.clear_block(block); + if (get_bits_left(gb) <= 0) + return AVERROR_INVALIDDATA; + size = get_vlc2(gb, dc_table, dc_bits, 1); if (size < 0) return AVERROR_INVALIDDATA;