TOMOYO: Add refcounter on domain structure.

Add refcounter to "struct tomoyo_domain_info" since garbage collector needs to
determine whether this struct is referred by "struct cred"->security or not.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index d60b8a61b0c8..6f74b30d6bb1 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -817,6 +817,8 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm)
  out:
         if (!domain)
                 domain = old_domain;
+        /* Update reference count on "struct tomoyo_domain_info". */
+        atomic_inc(&domain->users);
         bprm->cred->security = domain;
         kfree(real_program_name);
         kfree(symlink_program_name);