[FFmpeg-cvslog] avcodec/g2meet: Check tile dimensions with av_image_check_size2()

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Thu Feb 22 02:34:05 2018 +0100| [c3e774784bac7930743d47cbd37e0e9f06fa6e30] | committer: Michael Niedermayer

avcodec/g2meet: Check tile dimensions with av_image_check_size2()

Fixes: OOM
Fixes: 6216/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G2M_fuzzer-4983807968018432

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 3981fb8d2a03cdb3399590da8621a7bcc22e2964)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c3e774784bac7930743d47cbd37e0e9f06fa6e30
---

 libavcodec/g2meet.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c
index 10b6808f81..3b8b97ab41 100644
--- a/libavcodec/g2meet.c
+++ b/libavcodec/g2meet.c
@@ -28,6 +28,7 @@
 #include <inttypes.h>
 #include <zlib.h>
 
+#include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 
 #include "avcodec.h"
@@ -1451,7 +1452,8 @@ static int g2m_decode_frame(AVCodecContext *avctx, void *data,
             c->tile_height = bytestream2_get_be32(&bc);
             if (c->tile_width <= 0 || c->tile_height <= 0 ||
                 ((c->tile_width | c->tile_height) & 0xF) ||
-                c->tile_width * (uint64_t)c->tile_height >= INT_MAX / 4
+                c->tile_width * (uint64_t)c->tile_height >= INT_MAX / 4 ||
+                av_image_check_size2(c->tile_width, c->tile_height, avctx->max_pixels, avctx->pix_fmt, 0, avctx) < 0
             ) {
                 av_log(avctx, AV_LOG_ERROR,
                        "Invalid tile dimensions %dx%d\n",