userns: Convert audit to work with user namespaces enabled

- Explicitly format uids gids in audit messges in the initial user
  namespace. This is safe because auditd is restrected to be in
  the initial user namespace.

- Convert audit_sig_uid into a kuid_t.

- Enable building the audit code and user namespaces at the same time.

The net result is that the audit subsystem now uses kuid_t and kgid_t whenever
possible making it almost impossible to confuse a raw uid_t with a kuid_t
preventing bugs.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/init/Kconfig b/init/Kconfig
index fd8696b1a81e..b5ecb4e75518 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -927,8 +927,6 @@ config UIDGID_CONVERTED
         # Features
         depends on IMA = n
         depends on EVM = n
-        depends on AUDIT = n
-        depends on AUDITSYSCALL = n
         depends on TASKSTATS = n
         depends on TRACING = n
         depends on FS_POSIX_ACL = n