[FFmpeg-cvslog] avcodec/cpia: Check input size also against linesizes and EOL

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun May 19 17:42:04 2019 +0200| [7ffd2ae87eaa7cda08bdd14bd593c2911f959994] | committer: Michael Niedermayer

avcodec/cpia: Check input size also against linesizes and EOL

Fixes: Timeout (14sec -> 29ms)
Fixes: 14733/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CPIA_fuzzer-5707022445576192

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Carl Eugen Hoyos <ceffmpeg at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 3c0bfa7d1a90a22d5fe8daa415cc689c111562f1)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7ffd2ae87eaa7cda08bdd14bd593c2911f959994
---

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

diff --git a/libavcodec/cpia.c b/libavcodec/cpia.c
index 58833b2f26..f6d7332606 100644
--- a/libavcodec/cpia.c
+++ b/libavcodec/cpia.c
@@ -63,7 +63,7 @@ static int cpia_decode_frame(AVCodecContext *avctx,
     uint8_t *y, *u, *v, *y_end, *u_end, *v_end;
 
     // Check header
-    if ( avpkt->size < FRAME_HEADER_SIZE
+    if ( avpkt->size < FRAME_HEADER_SIZE + avctx->height * 3
       || header[0] != MAGIC_0 || header[1] != MAGIC_1
       || (header[17] != SUBSAMPLE_420 && header[17] != SUBSAMPLE_422)
       || (header[18] != YUVORDER_YUYV && header[18] != YUVORDER_UYVY)