From 1e59e000ecae2523e707242621738da27d0d6296 Mon Sep 17 00:00:00 2001 From: Zhang Xiaohui Date: Tue, 2 Feb 2021 16:10:05 +0800 Subject: [PATCH] fix division by zero in WriteJP2Image() in coders/jp2.c --- coders/jp2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- imagemagick-6.9.11.60+dfsg.orig/coders/jp2.c +++ imagemagick-6.9.11.60+dfsg/coders/jp2.c @@ -1064,8 +1064,8 @@ static MagickBooleanType WriteJP2Image(c scale=(double) (((size_t) 1UL << jp2_image->comps[i].prec)-1)/ QuantumRange; - q=jp2_image->comps[i].data+(y/jp2_image->comps[i].dy* - image->columns/jp2_image->comps[i].dx+x/jp2_image->comps[i].dx); + q=jp2_image->comps[i].data+(ssize_t) (y*PerceptibleReciprocal(jp2_image->comps[i].dy)* + image->columns*PerceptibleReciprocal(jp2_image->comps[i].dx)+x*PerceptibleReciprocal(jp2_image->comps[i].dx)); switch (i) { case 0: