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avcodec/tiff: Avoid abort with DNG RAW TIFF with YA8

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Fixes: Assertion failure
Fixes: 24707/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5179910197608448

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 2020-08-20 00:59:35 +02:00
parent 7577f8332a
commit ca47402a06
1 changed files with 1 additions and 1 deletions
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2
libavcodec/tiff.c
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@ -709,7 +709,7 @@ static int tiff_unpack_strip(TiffContext *s, AVFrame *p, uint8_t *dst, int strid
if (is_dng) {
int is_u16, pixel_size_bytes, pixel_size_bits, elements;
is_u16 = (s->bpp > 8);
is_u16 = (s->bpp / s->bppcount > 8);
pixel_size_bits = (is_u16 ? 16 : 8);
pixel_size_bytes = (is_u16 ? sizeof(uint16_t) : sizeof(uint8_t));