CRED: Wrap task credential accesses in the filesystem 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: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 5b5424cb3391..488584c87512 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -623,10 +623,10 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
         NEW_AUX_ENT(AT_BASE,    interp_params->elfhdr_addr);
         NEW_AUX_ENT(AT_FLAGS,   0);
         NEW_AUX_ENT(AT_ENTRY,   exec_params->entry_addr);
-        NEW_AUX_ENT(AT_UID,     (elf_addr_t) current->uid);
-        NEW_AUX_ENT(AT_EUID,    (elf_addr_t) current->euid);
-        NEW_AUX_ENT(AT_GID,     (elf_addr_t) current->gid);
-        NEW_AUX_ENT(AT_EGID,    (elf_addr_t) current->egid);
+        NEW_AUX_ENT(AT_UID,     (elf_addr_t) current_uid());
+        NEW_AUX_ENT(AT_EUID,    (elf_addr_t) current_euid());
+        NEW_AUX_ENT(AT_GID,     (elf_addr_t) current_gid());
+        NEW_AUX_ENT(AT_EGID,    (elf_addr_t) current_egid());
         NEW_AUX_ENT(AT_SECURE,  security_bprm_secureexec(bprm));
         NEW_AUX_ENT(AT_EXECFN,  bprm->exec);