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

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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@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-05-19 17:42:04 +02:00
parent fbdb3aa179
commit 3c0bfa7d1a
1 changed files with 1 additions and 1 deletions
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libavcodec/cpia.c
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@ -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)