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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-04 01:07:04 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-05 00:08:33 +0100 |
| commit | fef17e89283f8b72fc125cd066dce15a875802f6 (patch) | |
| tree | 2905ec1eb5a9bcefcff5cc7d1c38535b3cb3ca5b /libavcodec/cdgraphics.c | |
| parent | 4f66dd13d08d063e2748d172239df595078ff624 (diff) | |
avcodec/cdgraphics: Check frame before clearing
Fixes: null pointer dereference
Fixes: 27730/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CDGRAPHICS_fuzzer-6212402236096512
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/cdgraphics.c')
| -rw-r--r-- | libavcodec/cdgraphics.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/cdgraphics.c b/libavcodec/cdgraphics.c index 965f43684a..263459d0f2 100644 --- a/libavcodec/cdgraphics.c +++ b/libavcodec/cdgraphics.c @@ -369,6 +369,9 @@ static void cdg_decode_flush(AVCodecContext *avctx) { CDGraphicsContext *cc = avctx->priv_data; + if (!cc->frame->data[0]) + return; + memset(cc->frame->data[0], 0, cc->frame->linesize[0] * avctx->height); if (!avctx->frame_number) memset(cc->frame->data[1], 0, AVPALETTE_SIZE); |