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avcodec/msvideo1: Check for too small dimensions

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Such low resolution would result in empty output as a minimum of 4x4 is needed
We could also check for multiple of 4 dimensions but that is not needed

Fixes: Timeout
Fixes: 11191/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSVIDEO1_fuzzer-5739529588178944

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 953bd58861ad933e614510140b05a61e3d1375be)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-12-01 22:16:19 +01:00
parent 1a5db666ac
commit 558ba71de5
1 changed files with 3 additions and 0 deletions
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3
libavcodec/msvideo1.c
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@ -62,6 +62,9 @@ static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
if (avctx->width < 4 || avctx->height < 4)
return AVERROR_INVALIDDATA;
/* figure out the colorspace based on the presence of a palette */
if (s->avctx->bits_per_coded_sample == 8) {
s->mode_8bit = 1;