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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-22 20:21:05 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-23 03:03:04 +0200 |
| commit | 27f80ab0160d2e64007e1c9799ffd4504cc13eb5 (patch) | |
| tree | 8f84a0218e5b30707b4875a78de01cdda602ca59 /libavcodec/tiff.c | |
| parent | 7e98da9c4f423a26929188aa0aba5b9b3c5989b0 (diff) | |
avcodec/tiff: Update pointer only when the result is used
Fixes: runtime error: signed integer overflow: 538976288 * 32 cannot be represented in type 'int'
Fixes: 2310/clusterfuzz-testcase-minimized-4534784887881728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/tiff.c')
| -rw-r--r-- | libavcodec/tiff.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 4612c78ee9..1b332a754d 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -1306,6 +1306,8 @@ static int decode_frame(AVCodecContext *avctx, stride = p->linesize[plane]; dst = p->data[plane]; for (i = 0; i < s->height; i += s->rps) { + if (i) + dst += s->rps * stride; if (s->stripsizesoff) ssize = ff_tget(&stripsizes, s->sstype, le); else @@ -1326,7 +1328,6 @@ static int decode_frame(AVCodecContext *avctx, return ret; break; } - dst += s->rps * stride; } if (s->predictor == 2) { if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) { |