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avcodec/tiff: Check for 12bit gray fax 

Fixes: Assertion failure
Fixes: 11898/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5759794191794176

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 ec28a85107)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-01-12 19:37:18 +01:00
parent a8b5990f45
commit 552733d48b
1 changed files with 1 additions and 1 deletions
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2
libavcodec/tiff.c
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@ -571,7 +571,7 @@ static int tiff_unpack_strip(TiffContext *s, AVFrame *p, uint8_t *dst, int strid
if (s->compr == TIFF_CCITT_RLE ||
s->compr == TIFF_G3 ||
s->compr == TIFF_G4) {
if (is_yuv)
if (is_yuv || p->format == AV_PIX_FMT_GRAY12)
return AVERROR_INVALIDDATA;
return tiff_unpack_fax(s, dst, stride, src, size, width, lines);