From ff2d1bbe737539b9f564e53f84b7309bc2a38243 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 17 Nov 2022 23:18:01 +0100 Subject: [PATCH] avcodec/tiff: Avoid 0.0/0.0 in camera_xyz_coeff() Fixes: division by zero Fixes: 52230/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5922608915021824 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/tiff.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 5b56892071..cde318d5e5 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -1896,6 +1896,8 @@ static void camera_xyz_coeff(TiffContext *s, for (i = 0; i < 3; i++) { for (num = j = 0; j < 3; j++) num += cam2rgb[i][j]; + if (!num) + num = 1; for (j = 0; j < 3; j++) cam2rgb[i][j] /= num; s->premultiply[i] = 1.f / num;