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avcodec/dfa: Check dimension against maximum

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The headers from where the dimensions are read in actual files
are limited to 16bit per component.

Fixes: Timeout
Fixes: 6305/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DFA_fuzzer-4824270749302784

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9d5a4fcfbb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2018-04-16 22:04:53 +02:00
parent ecb375684d
commit 5888679ae3
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dfa.c
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@@ -41,7 +41,7 @@ static av_cold int dfa_decode_init(AVCodecContext *avctx)
avctx->pix_fmt = AV_PIX_FMT_PAL8;
if (!avctx->width || !avctx->height)
if (!avctx->width || !avctx->height || FFMAX(avctx->width, avctx->height) >= (1<<16))
return AVERROR_INVALIDDATA;
av_assert0(av_image_check_size(avctx->width, avctx->height, 0, avctx) >= 0);