From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 31 Jul 2024 00:55:31 +0000 (-0700)
Subject: Use ckd_add in page_aligned_alloc
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=be1aa32c6df9fea3e429ff62eebc3d8de28e0f67;p=thirdparty%2Ftar.git

Use ckd_add in page_aligned_alloc

* src/misc.c (page_aligned_alloc): Use ckd_add
instead of doing overflow checking by hand.
---

diff --git a/src/misc.c b/src/misc.c
index 1e2e8f3f..8388e1c7 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -1228,8 +1228,8 @@ void *
 page_aligned_alloc (void **ptr, size_t size)
 {
   size_t alignment = getpagesize ();
-  size_t size1 = size + alignment;
-  if (size1 < size)
+  size_t size1;
+  if (ckd_add (&size1, size, alignment))
     xalloc_die ();
   *ptr = xmalloc (size1);
   return ptr_align (*ptr, alignment);