From 074187d599a2ece2bdf77bd08b4b797c5800eda6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 4 Nov 2018 19:02:55 +0100 Subject: [PATCH] avcodec/mpeg4videodec: Clear partitioned frame in decode_studio_vop_header() partitioned_frame is also set/cleared in decode_vop_header() Fixes: out of array read Fixes: 9789/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5638681627983872 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mpeg4videodec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 233b8525ce..f44ee76bd4 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -3056,6 +3056,7 @@ static int decode_studio_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb) if (get_bits_left(gb) <= 32) return 0; + s->partitioned_frame = 0; s->decode_mb = mpeg4_decode_studio_mb; decode_smpte_tc(ctx, gb);