[FFmpeg-cvslog] avcodec/flicvideo: Fix off by 1 error in flic_decode_frame_24BPP()

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Fri Jun 21 23:45:36 2019 +0200| [10880dd695daa1fb85ef96a15be5b46ce339d2fb] | committer: Michael Niedermayer

avcodec/flicvideo: Fix off by 1 error in flic_decode_frame_24BPP()

Fixes: out of array access
Fixes: 15360/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-5653837190266880
Fixes: 15412/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-5740537648250880

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 37708cbae8d6887b80f58a70a1dfa01af6ea2c85)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=10880dd695daa1fb85ef96a15be5b46ce339d2fb
---

 libavcodec/flicvideo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index ba5bda48c4..c0e1e16bcd 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -900,7 +900,7 @@ static int flic_decode_frame_24BPP(AVCodecContext *avctx,
                         } else {
                             if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
                                 break;
-                            CHECK_PIXEL_PTR(2 * byte_run);
+                            CHECK_PIXEL_PTR(3 * byte_run);
                             for (j = 0; j < byte_run; j++, pixel_countdown--) {
                                 pixel = bytestream2_get_le24(&g2);
                                 AV_WL24(&pixels[pixel_ptr], pixel);