From 8e6db875afcd147d48718130fde4a05c3ac406db Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 11 May 2025 23:09:07 +0200 Subject: [PATCH] avcodec/takdec: Check remaining space for first predictors Fixes: Timeout Fixes: 403673829/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-5498240154009600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/takdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/takdec.c b/libavcodec/takdec.c index 74c8d7c7a8..1e6e6caebd 100644 --- a/libavcodec/takdec.c +++ b/libavcodec/takdec.c @@ -434,6 +434,9 @@ static int decode_subframe(TAKDecContext *s, int32_t *decoded, return AVERROR_INVALIDDATA; } + if (get_bits_left(gb) < 2*10 + 2*size) + return AVERROR_INVALIDDATA; + s->predictors[0] = get_sbits(gb, 10); s->predictors[1] = get_sbits(gb, 10); s->predictors[2] = get_sbits(gb, size) * (1 << (10 - size));