From 8b1f66cf5c2e4d29ae06cdf3f12cdd3d808006bd Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 7 May 2017 23:07:42 +0200 Subject: avcodec/wmv2dsp: Fix runtime error: signed integer overflow: 181 * -12156865 cannot be represented in type 'int' Fixes: 1401/clusterfuzz-testcase-minimized-6526248148795392 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/wmv2dsp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'libavcodec/wmv2dsp.c') diff --git a/libavcodec/wmv2dsp.c b/libavcodec/wmv2dsp.c index 162ac92a72..7a3a851861 100644 --- a/libavcodec/wmv2dsp.c +++ b/libavcodec/wmv2dsp.c @@ -78,8 +78,8 @@ static void wmv2_idct_col(short * b) a4 = (W0 * b[8 * 0] - W0 * b[8 * 4] ) >> 3; /* step 2 */ - s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; - s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8; + s1 = (int)(181U * (a1 - a5 + a7 - a3) + 128) >> 8; + s2 = (int)(181U * (a1 - a5 - a7 + a3) + 128) >> 8; /* step 3 */ b[8 * 0] = (a0 + a2 + a1 + a5 + (1 << 13)) >> 14; -- cgit v1.2.3