From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 27 Apr 2021 03:04:19 +0000 (-0700)
Subject: csplit: size_t overflow check
X-Git-Tag: v9.0~117
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=852794283564e2ac05162f0826fd67da1a6e2c3e;p=thirdparty%2Fcoreutils.git

csplit: size_t overflow check

* src/csplit.c (get_new_buffer): Fix unlikely size_t overflow.
---

diff --git a/src/csplit.c b/src/csplit.c
index 79bd034e3f..f188e88940 100644
--- a/src/csplit.c
+++ b/src/csplit.c
@@ -416,7 +416,8 @@ get_new_buffer (size_t min_size)
   if (alloc_size < min_size)
     {
       size_t s = min_size - alloc_size + INCR_SIZE - 1;
-      alloc_size += s - s % INCR_SIZE;
+      if (INT_ADD_WRAPV (alloc_size, s - s % INCR_SIZE, &alloc_size))
+        xalloc_die ();
     }
 
   new_buffer = create_new_buffer (alloc_size);