From 38d236794b78dbda5e93b1c54116528f3af9debc Mon Sep 17 00:00:00 2001
From: giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>
Date: Fri, 15 Sep 2023 04:23:21 +0000
Subject: Fix arithmetic overflow

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4654 9d0c8265-081b-0410-96cb-a4ca84ce46f8
---
 converter/pbm/pbmtoxbm.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'converter/pbm')

diff --git a/converter/pbm/pbmtoxbm.c b/converter/pbm/pbmtoxbm.c
index 5074c0fb..4bd33dd8 100644
--- a/converter/pbm/pbmtoxbm.c
+++ b/converter/pbm/pbmtoxbm.c
@@ -366,6 +366,10 @@ convertRaster(FILE *          const ifP,
     unsigned char * bitrow;
     unsigned int row;
 
+    if (cols > UINT_MAX - bitsPerUnit)
+        pm_error("Image is too wide (%u columns) for computations",
+                 cols);
+
     putinit(xbmVersion);
 
     bitrow = pbm_allocrow_packed(cols + padright);
-- 
cgit 1.4.1