apparmor: take nosymfollow flag into account

A "nosymfollow" flag was added in commit
dab741e ("Add a "nosymfollow" mount option.")

While we don't need to implement any special logic on
the AppArmor kernel side to handle it, we should provide
user with a correct list of mount flags in audit logs.

Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Author: mihalicyn

security/apparmor/mount.c

@@ -44,6 +44,8 @@ static void audit_mnt_flags(struct audit_buffer *ab, unsigned long flags)
 		audit_log_format(ab, ", mand");
 	if (flags & MS_DIRSYNC)
 		audit_log_format(ab, ", dirsync");
+	if (flags & MS_NOSYMFOLLOW)
+		audit_log_format(ab, ", nosymfollow");
 	if (flags & MS_NOATIME)
 		audit_log_format(ab, ", noatime");
 	if (flags & MS_NODIRATIME)