CRED: Wrap task credential accesses in the networking subsystem

Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: netdev@vger.kernel.org
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/core/scm.c b/net/core/scm.c
index 10f5c65f6a4..4681d8f9b45 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -45,10 +45,10 @@
 static __inline__ int scm_check_creds(struct ucred *creds)
 {
         if ((creds->pid == task_tgid_vnr(current) || capable(CAP_SYS_ADMIN)) &&
-            ((creds->uid == current->uid || creds->uid == current->euid ||
-              creds->uid == current->suid) || capable(CAP_SETUID)) &&
-            ((creds->gid == current->gid || creds->gid == current->egid ||
-              creds->gid == current->sgid) || capable(CAP_SETGID))) {
+            ((creds->uid == current_uid()   || creds->uid == current_euid() ||
+              creds->uid == current_suid()) || capable(CAP_SETUID)) &&
+            ((creds->gid == current_gid()   || creds->gid == current_egid() ||
+              creds->gid == current_sgid()) || capable(CAP_SETGID))) {
                return 0;
         }
         return -EPERM;