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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-04-16 17:38:39 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-05-06 00:22:26 +0200 |
| commit | 6e98cf0280cd693ef82c4444fe15bc7aef8771b3 (patch) | |
| tree | 3a7d2652b83b7364881db867628235c5a2c4fec7 | |
| parent | 19b66b89da4b4ff086dc1fc79bbf540e82bdbcb4 (diff) | |
| download | ffmpeg-6e98cf0280cd693ef82c4444fe15bc7aef8771b3.tar.gz | |
avcodec/tiff: add a zero DNG_LINEARIZATION_TABLE check
Fixes: index 4294967295 out of bounds for type 'uint16_t [65536]'
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5950405086674944
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-6666195176914944
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/tiff.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 560cb3e5b3..148964590b 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -1451,7 +1451,7 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) break; case TIFF_GRAY_RESPONSE_CURVE: case DNG_LINEARIZATION_TABLE: - if (count > FF_ARRAY_ELEMS(s->dng_lut)) + if (count < 1 || count > FF_ARRAY_ELEMS(s->dng_lut)) return AVERROR_INVALIDDATA; for (int i = 0; i < count; i++) s->dng_lut[i] = ff_tget(&s->gb, type, s->le); |