From f8cef4d07d9641e27629bd3ce2d13f5d702fb251 Mon Sep 17 00:00:00 2001

From: DJ Delorie <dj@delorie.com>

Date: Wed, 19 Jul 2017 13:14:34 -0400

Subject: [PATCH] Fix cast-after-dereference

Original code was dereferencing a char*, then casting the value

to size_t.  Should cast the pointer to size_t* then deference.

---

 ChangeLog       | 4 ++++

 grp/grp-merge.c | 2 +-

 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/grp/grp-merge.c b/grp/grp-merge.c

index 6590e5d..035e7a6 100644

--- a/grp/grp-merge.c

+++ b/grp/grp-merge.c

@@ -137,7 +137,7 @@ __merge_grp (struct group *savedgrp, char *savedbuf, char *savedend,

   /* Get the count of group members from the last sizeof (size_t) bytes in the

      mergegrp buffer.  */

-  savedmemcount = (size_t) *(savedend - sizeof (size_t));

+  savedmemcount = *(size_t *) (savedend - sizeof (size_t));

   /* Get the count of new members to add.  */

   for (memcount = 0; mergegrp->gr_mem[memcount]; memcount++)

-- 

1.8.3.1