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avcodec/tiff: Check stride for dng 

Fixes: assertion failure
Fixes: 23422/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5746026064642048

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 2020-06-14 23:45:46 +02:00
parent 6c84f8afae
commit 276dfa9d91
1 changed files with 3 additions and 0 deletions
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3
libavcodec/tiff.c
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@ -679,6 +679,9 @@ static int tiff_unpack_strip(TiffContext *s, AVFrame *p, uint8_t *dst, int strid
return 0;
}
if (is_dng && stride == 0)
return AVERROR_INVALIDDATA;
for (line = 0; line < lines; line++) {
if (src - ssrc > size) {
av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");