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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-16 02:00:17 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-20 03:41:33 +0200 |
| commit | 26b2b2d052af89fd364d94827008186ac1f1f94c (patch) | |
| tree | 221628f5f86bb5ce87d29cc2e93d0c6f943c7c14 | |
| parent | 17624e415636b4f058403d351e757a1667441bb7 (diff) | |
| download | ffmpeg-26b2b2d052af89fd364d94827008186ac1f1f94c.tar.gz | |
avcodec/tiff: Check stripsize strippos for overflow
Fixes: 861/clusterfuzz-testcase-5688284384591872
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5d996b56499f00f80b02a41bab3d6b7349e36e9d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/tiff.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index ecafd2ddf1..70e34b469d 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -904,6 +904,11 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) break; case TIFF_STRIP_OFFS: if (count == 1) { + if (value > INT_MAX) { + av_log(s->avctx, AV_LOG_ERROR, + "strippos %u too large\n", value); + return AVERROR_INVALIDDATA; + } s->strippos = 0; s->stripoff = value; } else @@ -915,6 +920,11 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) break; case TIFF_STRIP_SIZE: if (count == 1) { + if (value > INT_MAX) { + av_log(s->avctx, AV_LOG_ERROR, + "stripsize %u too large\n", value); + return AVERROR_INVALIDDATA; + } s->stripsizesoff = 0; s->stripsize = value; s->strips = 1; |