From a78ae465fda902565ed041d93403e04490b4be0d Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 27 Apr 2017 15:10:25 +0200 Subject: [PATCH] avcodec/mjpegdec: Fix runtime error: signed integer overflow: -24543 * 2031616 cannot be represented in type 'int' Fixes: 943/clusterfuzz-testcase-5114865297391616 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mjpegdec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index a86f6b2642..ed381de66a 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -776,7 +776,8 @@ static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block, uint16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN) { - int code, i, j, level, val, run; + int code, i, j, val, run; + unsigned level; if (*EOBRUN) { (*EOBRUN)--;