diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-19 23:21:21 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-26 20:31:09 +0200 |
| commit | 7577f8332a6bb2f227b876c83ec6fa45cc9670f9 (patch) | |
| tree | a23ce779a56bd4ba971bbd88892b7b856d5a70d5 | |
| parent | 649a6969f75f2378c65768deb9debd325eb2fc7f (diff) | |
| download | ffmpeg-7577f8332a6bb2f227b876c83ec6fa45cc9670f9.tar.gz | |
avcodec/tiff: Check the linearization table size
Fixes: out of array access
Fixes: 24604/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-4843529818603520
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 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 08dbca9d60..8c0b6f0853 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -1434,7 +1434,9 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) s->sub_ifd = ff_tget(&s->gb, TIFF_LONG, s->le); /** Only get the first SubIFD */ break; case DNG_LINEARIZATION_TABLE: - for (int i = 0; i < FFMIN(count, 1 << s->bpp); i++) + if (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); break; case DNG_BLACK_LEVEL: |