toolchain/fortify-headers/patches/100-fix-getgroups.patch

   1 From 1f9848efc8a329cb9a13323cbb94b353d39802c1 Mon Sep 17 00:00:00 2001
   2 From: Steven Barth <steven@midlink.org>
   3 Date: Mon, 22 Jun 2015 14:36:16 +0200
   4 Subject: [PATCH] unistd: fix signed / unsigned comparison in getgroups
   5
   6 Signed-off-by: Steven Barth <steven@midlink.org>
   7 ---
   8  include/unistd.h | 2 +-
   9  1 file changed, 1 insertion(+), 1 deletion(-)
  10
  11 diff --git a/include/unistd.h b/include/unistd.h
  12 index 45304e1..5274e22 100644
  13 --- a/include/unistd.h
  14 +++ b/include/unistd.h
  15 @@ -71,7 +71,7 @@ _FORTIFY_FN(getgroups) int getgroups(int __l, gid_t *__s)
  16  {
  17         size_t __b = __builtin_object_size(__s, 0);
  18
  19 -       if (__l > __b / sizeof(gid_t))
  20 +       if (__l < 0 || (size_t)__l > __b / sizeof(gid_t))
  21                 __builtin_trap();
  22         return __orig_getgroups(__l, __s);
  23  }
  24 --
  25 2.1.4
  26