From beea3bd8dd05a731fddfa447ff0bad19fe32c973 Mon Sep 17 00:00:00 2001
From: Peter Szabo <pts@fazekas.hu>
Date: Tue, 27 Feb 2018 15:19:31 +0100
Subject: [PATCH] bugfix: fixed + 7 integer overflow in pnm_load_rawpbm; this
 fixes https://github.com/pts/sam2p/issues/22

---
 input-pnm.ci | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/input-pnm.ci b/input-pnm.ci
index 6f7fff4..fffe4d5 100644
--- a/input-pnm.ci
+++ b/input-pnm.ci
@@ -392,7 +392,7 @@ pnm_load_rawpbm (PNMScanner *scan,
 
   fd = pnmscanner_fd(scan);
   /****pts****/ /* rowlen = (unsigned int)ceil((double)(info->xres)/8.0);*/
-  rowlen=(info->xres+7)>>3;
+  rowlen = (info->xres >> 3) + (info->xres & 3 ? 1 : 0);
   /* buf = (unsigned char *)malloc(rowlen*sizeof(unsigned char)); */
   XMALLOCT(buf, unsigned char*, rowlen*sizeof(unsigned char));