From: Michael Niedermayer Date: Sun, 4 Nov 2018 18:02:55 +0000 (+0100) Subject: avcodec/mpeg4videodec: Clear partitioned frame in decode_studio_vop_header() X-Git-Tag: n4.2~2009 X-Git-Url: http://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=074187d599a2ece2bdf77bd08b4b797c5800eda6;ds=sidebyside 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 --- 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);