diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-06-09 23:36:00 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-07-12 23:09:38 +0300 |
| commit | 93d44b10e8bdcf94d2945e0a19572a759e433de9 (patch) | |
| tree | 77b7eb16ddf95b51f394b89cd018fb083768432f | |
| parent | 06bd0a44a8a0289afe2ab7a66a62bdde4517207d (diff) | |
avcodec/cdgraphics: limit scrolling to the line
Fixes: out of array access
Fixes: 47877/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CDGRAPHICS_fuzzer-5690504626438144
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b7e30a13d4e4557b87f977b76a6bb5e3cbe5ac78)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/cdgraphics.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/cdgraphics.c b/libavcodec/cdgraphics.c index da6fb7af03..3d8219a451 100644 --- a/libavcodec/cdgraphics.c +++ b/libavcodec/cdgraphics.c @@ -238,7 +238,7 @@ static void cdg_scroll(CDGraphicsContext *cc, uint8_t *data, for (y = FFMAX(0, vinc); y < FFMIN(CDG_FULL_HEIGHT + vinc, CDG_FULL_HEIGHT); y++) memcpy(out + FFMAX(0, hinc) + stride * y, in + FFMAX(0, hinc) - hinc + (y - vinc) * stride, - FFMIN(stride + hinc, stride)); + FFABS(stride) - FFABS(hinc)); if (vinc > 0) cdg_fill_wrapper(0, 0, out, |