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libavcodec/8bps: Check that line lengths fit within the buffer

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Fixes: Timeout
Fixes: undefined pointer arithmetic
Fixes: 50330/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EIGHTBPS_fuzzer-5436287485607936

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-08-22 22:10:09 +02:00
parent e264a4a76e
commit 2316d5ec1a
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1 changed files with 3 additions and 0 deletions
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libavcodec/8bps.c
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@ -68,6 +68,9 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
unsigned char *planemap = c->planemap; unsigned char *planemap = c->planemap;
int ret; int ret;
if (buf_size < planes * height *2)
return AVERROR_INVALIDDATA;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret; return ret;