Revert "SELinux: do not handle seclabel as a special flag"

This reverts commit 308ab70c465d97cf7e3168961dfd365535de21a6.

It breaks my FC6 test box.  /dev/pts is not mounted.  dmesg says

SELinux: mount invalid.  Same superblock, different security settings
for (dev devpts, type devpts)

Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 0d4408debb45..c156f5eb1aea 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -504,6 +504,9 @@ static int selinux_get_mnt_opts(const struct super_block *sb,
                         opts->num_mnt_opts++;
                 tmp >>= 1;
         }
+        /* Check if the Label support flag is set */
+        if (sbsec->flags & SBLABEL_MNT)
+                opts->num_mnt_opts++;
 
         opts->mnt_opts = kcalloc(opts->num_mnt_opts, sizeof(char *), GFP_ATOMIC);
         if (!opts->mnt_opts) {