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avcodec/wnv1: Check for width =1

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The decoder only outputs pixels for width >1 images, fail early

Fixes: Timeout
Fixes: 48298/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WNV1_fuzzer-6198626319204352

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 d98d5a436a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-07-03 02:31:47 +02:00
parent 6d40df7ea7
commit f0aeea08a9
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wnv1.c
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@ -136,6 +136,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
{ {
static VLC_TYPE code_table[1 << CODE_VLC_BITS][2]; static VLC_TYPE code_table[1 << CODE_VLC_BITS][2];
if (avctx->width <= 1)
return AVERROR_INVALIDDATA;
avctx->pix_fmt = AV_PIX_FMT_YUV422P; avctx->pix_fmt = AV_PIX_FMT_YUV422P;
code_vlc.table = code_table; code_vlc.table = code_table;