CRED: Separate task security context from task_struct

Separate the task security context from task_struct.  At this point, the
security data is temporarily embedded in the task_struct with two pointers
pointing to it.

Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in
entry.S via asm-offsets.

With comment fixes Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>

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

15 files changed, 250 insertions, 204 deletions

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 9c7e47a..2febf51 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -447,6 +447,7 @@ static int audit_filter_rules(struct task_struct *tsk,
 			      struct audit_names *name,
 			      enum audit_state *state)
 {
+	struct cred *cred = tsk->cred;
 	int i, j, need_sid = 1;
 	u32 sid;
 
@@ -466,28 +467,28 @@ static int audit_filter_rules(struct task_struct *tsk,
 			}
 			break;
 		case AUDIT_UID:
-			result = audit_comparator(tsk->uid, f->op, f->val);
+			result = audit_comparator(cred->uid, f->op, f->val);
 			break;
 		case AUDIT_EUID:
-			result = audit_comparator(tsk->euid, f->op, f->val);
+			result = audit_comparator(cred->euid, f->op, f->val);
 			break;
 		case AUDIT_SUID:
-			result = audit_comparator(tsk->suid, f->op, f->val);
+			result = audit_comparator(cred->suid, f->op, f->val);
 			break;
 		case AUDIT_FSUID:
-			result = audit_comparator(tsk->fsuid, f->op, f->val);
+			result = audit_comparator(cred->fsuid, f->op, f->val);
 			break;
 		case AUDIT_GID:
-			result = audit_comparator(tsk->gid, f->op, f->val);
+			result = audit_comparator(cred->gid, f->op, f->val);
 			break;
 		case AUDIT_EGID:
-			result = audit_comparator(tsk->egid, f->op, f->val);
+			result = audit_comparator(cred->egid, f->op, f->val);
 			break;
 		case AUDIT_SGID:
-			result = audit_comparator(tsk->sgid, f->op, f->val);
+			result = audit_comparator(cred->sgid, f->op, f->val);
 			break;
 		case AUDIT_FSGID:
-			result = audit_comparator(tsk->fsgid, f->op, f->val);
+			result = audit_comparator(cred->fsgid, f->op, f->val);
 			break;
 		case AUDIT_PERS:
 			result = audit_comparator(tsk->personality, f->op, f->val);
@@ -1228,6 +1229,7 @@ static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
 
 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
 {
+	struct cred *cred = tsk->cred;
 	int i, call_panic = 0;
 	struct audit_buffer *ab;
 	struct audit_aux_data *aux;
@@ -1237,14 +1239,14 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 	context->pid = tsk->pid;
 	if (!context->ppid)
 		context->ppid = sys_getppid();
-	context->uid = tsk->uid;
-	context->gid = tsk->gid;
-	context->euid = tsk->euid;
-	context->suid = tsk->suid;
-	context->fsuid = tsk->fsuid;
-	context->egid = tsk->egid;
-	context->sgid = tsk->sgid;
-	context->fsgid = tsk->fsgid;
+	context->uid = cred->uid;
+	context->gid = cred->gid;
+	context->euid = cred->euid;
+	context->suid = cred->suid;
+	context->fsuid = cred->fsuid;
+	context->egid = cred->egid;
+	context->sgid = cred->sgid;
+	context->fsgid = cred->fsgid;
 	context->personality = tsk->personality;
 
 	ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
@@ -2086,7 +2088,7 @@ int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
 			audit_log_format(ab, "login pid=%d uid=%u "
 				"old auid=%u new auid=%u"
 				" old ses=%u new ses=%u",
-				task->pid, task->uid,
+				task->pid, task->cred->uid,
 				task->loginuid, loginuid,
 				task->sessionid, sessionid);
 			audit_log_end(ab);
@@ -2469,7 +2471,7 @@ void __audit_ptrace(struct task_struct *t)
 
 	context->target_pid = t->pid;
 	context->target_auid = audit_get_loginuid(t);
-	context->target_uid = t->uid;
+	context->target_uid = t->cred->uid;
 	context->target_sessionid = audit_get_sessionid(t);
 	security_task_getsecid(t, &context->target_sid);
 	memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
@@ -2495,7 +2497,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
 			if (tsk->loginuid != -1)
 				audit_sig_uid = tsk->loginuid;
 			else
-				audit_sig_uid = tsk->uid;
+				audit_sig_uid = tsk->cred->uid;
 			security_task_getsecid(tsk, &audit_sig_sid);
 		}
 		if (!audit_signals || audit_dummy_context())
@@ -2507,7 +2509,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
 	if (!ctx->target_pid) {
 		ctx->target_pid = t->tgid;
 		ctx->target_auid = audit_get_loginuid(t);
-		ctx->target_uid = t->uid;
+		ctx->target_uid = t->cred->uid;
 		ctx->target_sessionid = audit_get_sessionid(t);
 		security_task_getsecid(t, &ctx->target_sid);
 		memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
@@ -2528,7 +2530,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
 
 	axp->target_pid[axp->pid_count] = t->tgid;
 	axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
-	axp->target_uid[axp->pid_count] = t->uid;
+	axp->target_uid[axp->pid_count] = t->cred->uid;
 	axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
 	security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
 	memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
@@ -2575,12 +2577,12 @@ void __audit_log_bprm_fcaps(struct linux_binprm *bprm, kernel_cap_t *pP, kernel_
 	ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
 
 	ax->old_pcap.permitted = *pP;
-	ax->old_pcap.inheritable = current->cap_inheritable;
+	ax->old_pcap.inheritable = current->cred->cap_inheritable;
 	ax->old_pcap.effective = *pE;
 
-	ax->new_pcap.permitted = current->cap_permitted;
-	ax->new_pcap.inheritable = current->cap_inheritable;
-	ax->new_pcap.effective = current->cap_effective;
+	ax->new_pcap.permitted = current->cred->cap_permitted;
+	ax->new_pcap.inheritable = current->cred->cap_inheritable;
+	ax->new_pcap.effective = current->cred->cap_effective;
 }
 
 /**
diff --git a/kernel/capability.c b/kernel/capability.c
index 58b0051..a404b98 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -171,8 +171,8 @@ kernel_cap_t cap_set_effective(const kernel_cap_t pE_new)
 
 	spin_lock(&task_capability_lock);
 
-	pE_old = current->cap_effective;
-	current->cap_effective = pE_new;
+	pE_old = current->cred->cap_effective;
+	current->cred->cap_effective = pE_new;
 
 	spin_unlock(&task_capability_lock);
 
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 78f9b31..e210526 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1293,7 +1293,9 @@ static int attach_task_by_pid(struct cgroup *cgrp, u64 pid)
 		rcu_read_unlock();
 
 		euid = current_euid();
-		if (euid && euid != tsk->uid && euid != tsk->suid) {
+		if (euid &&
+		    euid != tsk->cred->uid &&
+		    euid != tsk->cred->suid) {
 			put_task_struct(tsk);
 			return -EACCES;
 		}
diff --git a/kernel/exit.c b/kernel/exit.c
index 80137a5..e0f6e18 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -160,7 +160,7 @@ void release_task(struct task_struct * p)
 	int zap_leader;
 repeat:
 	tracehook_prepare_release_task(p);
-	atomic_dec(&p->user->processes);
+	atomic_dec(&p->cred->user->processes);
 	proc_flush_task(p);
 	write_lock_irq(&tasklist_lock);
 	tracehook_finish_release_task(p);
@@ -1272,7 +1272,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
 		return 0;
 
 	if (unlikely(options & WNOWAIT)) {
-		uid_t uid = p->uid;
+		uid_t uid = p->cred->uid;
 		int exit_code = p->exit_code;
 		int why, status;
 
@@ -1393,7 +1393,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
 	if (!retval && infop)
 		retval = put_user(pid, &infop->si_pid);
 	if (!retval && infop)
-		retval = put_user(p->uid, &infop->si_uid);
+		retval = put_user(p->cred->uid, &infop->si_uid);
 	if (!retval)
 		retval = pid;
 
@@ -1458,7 +1458,7 @@ static int wait_task_stopped(int ptrace, struct task_struct *p,
 	if (!unlikely(options & WNOWAIT))
 		p->exit_code = 0;
 
-	uid = p->uid;
+	uid = p->cred->uid;
 unlock_sig:
 	spin_unlock_irq(&p->sighand->siglock);
 	if (!exit_code)
@@ -1535,7 +1535,7 @@ static int wait_task_continued(struct task_struct *p, int options,
 	spin_unlock_irq(&p->sighand->siglock);
 
 	pid = task_pid_vnr(p);
-	uid = p->uid;
+	uid = p->cred->uid;
 	get_task_struct(p);
 	read_unlock(&tasklist_lock);
 
diff --git a/kernel/fork.c b/kernel/fork.c
index f608356..81fdc77 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -147,8 +147,8 @@ void __put_task_struct(struct task_struct *tsk)
 	WARN_ON(tsk == current);
 
 	security_task_free(tsk);
-	free_uid(tsk->user);
-	put_group_info(tsk->group_info);
+	free_uid(tsk->__temp_cred.user);
+	put_group_info(tsk->__temp_cred.group_info);
 	delayacct_tsk_free(tsk);
 
 	if (!profile_handoff_task(tsk))
@@ -969,17 +969,18 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
 	DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
 #endif
+	p->cred = &p->__temp_cred;
 	retval = -EAGAIN;
-	if (atomic_read(&p->user->processes) >=
+	if (atomic_read(&p->cred->user->processes) >=
 			p->signal->rlim[RLIMIT_NPROC].rlim_cur) {
 		if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RESOURCE) &&
-		    p->user != current->nsproxy->user_ns->root_user)
+		    p->cred->user != current->nsproxy->user_ns->root_user)
 			goto bad_fork_free;
 	}
 
-	atomic_inc(&p->user->__count);
-	atomic_inc(&p->user->processes);
-	get_group_info(p->group_info);
+	atomic_inc(&p->cred->user->__count);
+	atomic_inc(&p->cred->user->processes);
+	get_group_info(p->cred->group_info);
 
 	/*
 	 * If multiple threads are within copy_process(), then this check
@@ -1035,9 +1036,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->real_start_time = p->start_time;
 	monotonic_to_bootbased(&p->real_start_time);
 #ifdef CONFIG_SECURITY
-	p->security = NULL;
+	p->cred->security = NULL;
 #endif
-	p->cap_bset = current->cap_bset;
 	p->io_context = NULL;
 	p->audit_context = NULL;
 	cgroup_fork(p);
@@ -1298,9 +1298,9 @@ bad_fork_cleanup_cgroup:
 bad_fork_cleanup_put_domain:
 	module_put(task_thread_info(p)->exec_domain->module);
 bad_fork_cleanup_count:
-	put_group_info(p->group_info);
-	atomic_dec(&p->user->processes);
-	free_uid(p->user);
+	put_group_info(p->cred->group_info);
+	atomic_dec(&p->cred->user->processes);
+	free_uid(p->cred->user);
 bad_fork_free:
 	free_task(p);
 fork_out:
diff --git a/kernel/futex.c b/kernel/futex.c
index e069621..28421d8 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -443,7 +443,8 @@ static struct task_struct * futex_find_get_task(pid_t pid)
 
 	rcu_read_lock();
 	p = find_task_by_vpid(pid);
-	if (!p || (euid != p->euid && euid != p->uid))
+	if (!p || (euid != p->cred->euid &&
+		   euid != p->cred->uid))
 		p = ERR_PTR(-ESRCH);
 	else
 		get_task_struct(p);
@@ -1846,7 +1847,8 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
 		if (!p)
 			goto err_unlock;
 		ret = -EPERM;
-		if (euid != p->euid && euid != p->uid &&
+		if (euid != p->cred->euid &&
+		    euid != p->cred->uid &&
 		    !capable(CAP_SYS_PTRACE))
 			goto err_unlock;
 		head = p->robust_list;
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 3254d4e..2c3fd5e 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -151,8 +151,9 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 		if (!p)
 			goto err_unlock;
 		ret = -EPERM;
-		if (euid != p->euid && euid != p->uid &&
-				!capable(CAP_SYS_PTRACE))
+		if (euid != p->cred->euid &&
+		    euid != p->cred->uid &&
+		    !capable(CAP_SYS_PTRACE))
 			goto err_unlock;
 		head = p->compat_robust_list;
 		read_unlock(&tasklist_lock);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 937f6b5..49849d1 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -115,6 +115,8 @@ int ptrace_check_attach(struct task_struct *child, int kill)
 
 int __ptrace_may_access(struct task_struct *task, unsigned int mode)
 {
+	struct cred *cred = current->cred, *tcred = task->cred;
+
 	/* May we inspect the given task?
 	 * This check is used both for attaching with ptrace
 	 * and for allowing access to sensitive information in /proc.
@@ -123,19 +125,18 @@ int __ptrace_may_access(struct task_struct *task, unsigned int mode)
 	 * because setting up the necessary parent/child relationship
 	 * or halting the specified task is impossible.
 	 */
-	uid_t uid;
-	gid_t gid;
+	uid_t uid = cred->uid;
+	gid_t gid = cred->gid;
 	int dumpable = 0;
 	/* Don't let security modules deny introspection */
 	if (task == current)
 		return 0;
-	current_uid_gid(&uid, &gid);
-	if ((uid != task->euid ||
-	     uid != task->suid ||
-	     uid != task->uid  ||
-	     gid != task->egid ||
-	     gid != task->sgid ||
-	     gid != task->gid) && !capable(CAP_SYS_PTRACE))
+	if ((uid != tcred->euid ||
+	     uid != tcred->suid ||
+	     uid != tcred->uid  ||
+	     gid != tcred->egid ||
+	     gid != tcred->sgid ||
+	     gid != tcred->gid) && !capable(CAP_SYS_PTRACE))
 		return -EPERM;
 	smp_rmb();
 	if (task->mm)
diff --git a/kernel/sched.c b/kernel/sched.c
index c3b8b1f..733c59e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -345,7 +345,7 @@ static inline struct task_group *task_group(struct task_struct *p)
 	struct task_group *tg;
 
 #ifdef CONFIG_USER_SCHED
-	tg = p->user->tg;
+	tg = p->cred->user->tg;
 #elif defined(CONFIG_CGROUP_SCHED)
 	tg = container_of(task_subsys_state(p, cpu_cgroup_subsys_id),
 				struct task_group, css);
@@ -5182,8 +5182,8 @@ recheck:
 
 		/* can't change other user's priorities */
 		euid = current_euid();
-		if (euid != p->euid &&
-		    euid != p->uid)
+		if (euid != p->cred->euid &&
+		    euid != p->cred->uid)
 			return -EPERM;
 	}
 
@@ -5417,7 +5417,9 @@ long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
 
 	euid = current_euid();
 	retval = -EPERM;
-	if (euid != p->euid && euid != p->uid && !capable(CAP_SYS_NICE))
+	if (euid != p->cred->euid &&
+	    euid != p->cred->uid &&
+	    !capable(CAP_SYS_NICE))
 		goto out_unlock;
 
 	retval = security_task_setscheduler(p, 0, NULL);
diff --git a/kernel/signal.c b/kernel/signal.c
index 167b535..80e8a648 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -187,7 +187,7 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
 	 * In order to avoid problems with "switch_user()", we want to make
 	 * sure that the compiler doesn't re-load "t->user"
 	 */
-	user = t->user;
+	user = t->cred->user;
 	barrier();
 	atomic_inc(&user->sigpending);
 	if (override_rlimit ||
@@ -582,8 +582,8 @@ static int check_kill_permission(int sig, struct siginfo *info,
 
 	uid = current_uid();
 	euid = current_euid();
-	if ((euid ^ t->suid) && (euid ^ t->uid) &&
-	    (uid  ^ t->suid) && (uid  ^ t->uid) &&
+	if ((euid ^ t->cred->suid) && (euid ^ t->cred->uid) &&
+	    (uid  ^ t->cred->suid) && (uid  ^ t->cred->uid) &&
 	    !capable(CAP_KILL)) {
 		switch (sig) {
 		case SIGCONT:
@@ -1100,8 +1100,8 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
 		goto out_unlock;
 	}
 	if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
-	    && (euid != p->suid) && (euid != p->uid)
-	    && (uid != p->suid) && (uid != p->uid)) {
+	    && (euid != p->cred->suid) && (euid != p->cred->uid)
+	    && (uid != p->cred->suid) && (uid != p->cred->uid)) {
 		ret = -EPERM;
 		goto out_unlock;
 	}
@@ -1374,7 +1374,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
 	info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
 	rcu_read_unlock();
 
-	info.si_uid = tsk->uid;
+	info.si_uid = tsk->cred->uid;
 
 	thread_group_cputime(tsk, &cputime);
 	info.si_utime = cputime_to_jiffies(cputime.utime);
@@ -1445,7 +1445,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
 	info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
 	rcu_read_unlock();
 
-	info.si_uid = tsk->uid;
+	info.si_uid = tsk->cred->uid;
 
 	info.si_utime = cputime_to_clock_t(tsk->utime);
 	info.si_stime = cputime_to_clock_t(tsk->stime);
@@ -1713,7 +1713,7 @@ static int ptrace_signal(int signr, siginfo_t *info,
 		info->si_errno = 0;
 		info->si_code = SI_USER;
 		info->si_pid = task_pid_vnr(current->parent);
-		info->si_uid = current->parent->uid;
+		info->si_uid = current->parent->cred->uid;
 	}
 
 	/* If the (new) signal is now blocked, requeue it.  */
diff --git a/kernel/sys.c b/kernel/sys.c
index ed5c29c..5d81f07 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -117,7 +117,9 @@ static int set_one_prio(struct task_struct *p, int niceval, int error)
 	uid_t euid = current_euid();
 	int no_nice;
 
-	if (p->uid != euid && p->euid != euid && !capable(CAP_SYS_NICE)) {
+	if (p->cred->uid  != euid &&
+	    p->cred->euid != euid &&
+	    !capable(CAP_SYS_NICE)) {
 		error = -EPERM;
 		goto out;
 	}
@@ -174,7 +176,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
 			} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
 			break;
 		case PRIO_USER:
-			user = current->user;
+			user = current->cred->user;
 			if (!who)
 				who = current_uid();
 			else
@@ -182,7 +184,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
 					goto out_unlock;	/* No processes for this user */
 
 			do_each_thread(g, p)
-				if (p->uid == who)
+				if (p->cred->uid == who)
 					error = set_one_prio(p, niceval, error);
 			while_each_thread(g, p);
 			if (who != current_uid())
@@ -236,7 +238,7 @@ asmlinkage long sys_getpriority(int which, int who)
 			} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
 			break;
 		case PRIO_USER:
-			user = current->user;
+			user = current->cred->user;
 			if (!who)
 				who = current_uid();
 			else
@@ -244,7 +246,7 @@ asmlinkage long sys_getpriority(int which, int who)
 					goto out_unlock;	/* No processes for this user */
 
 			do_each_thread(g, p)
-				if (p->uid == who) {
+				if (p->cred->uid == who) {
 					niceval = 20 - task_nice(p);
 					if (niceval > retval)
 						retval = niceval;
@@ -472,8 +474,9 @@ void ctrl_alt_del(void)
  */
 asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 {
-	int old_rgid = current->gid;
-	int old_egid = current->egid;
+	struct cred *cred = current->cred;
+	int old_rgid = cred->gid;
+	int old_egid = cred->egid;
 	int new_rgid = old_rgid;
 	int new_egid = old_egid;
 	int retval;
@@ -484,7 +487,7 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 
 	if (rgid != (gid_t) -1) {
 		if ((old_rgid == rgid) ||
-		    (current->egid==rgid) ||
+		    (cred->egid == rgid) ||
 		    capable(CAP_SETGID))
 			new_rgid = rgid;
 		else
@@ -492,8 +495,8 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 	}
 	if (egid != (gid_t) -1) {
 		if ((old_rgid == egid) ||
-		    (current->egid == egid) ||
-		    (current->sgid == egid) ||
+		    (cred->egid == egid) ||
+		    (cred->sgid == egid) ||
 		    capable(CAP_SETGID))
 			new_egid = egid;
 		else
@@ -505,10 +508,10 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 	}
 	if (rgid != (gid_t) -1 ||
 	    (egid != (gid_t) -1 && egid != old_rgid))
-		current->sgid = new_egid;
-	current->fsgid = new_egid;
-	current->egid = new_egid;
-	current->gid = new_rgid;
+		cred->sgid = new_egid;
+	cred->fsgid = new_egid;
+	cred->egid = new_egid;
+	cred->gid = new_rgid;
 	key_fsgid_changed(current);
 	proc_id_connector(current, PROC_EVENT_GID);
 	return 0;
@@ -521,7 +524,8 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
  */
 asmlinkage long sys_setgid(gid_t gid)
 {
-	int old_egid = current->egid;
+	struct cred *cred = current->cred;
+	int old_egid = cred->egid;
 	int retval;
 
 	retval = security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_ID);
@@ -533,13 +537,13 @@ asmlinkage long sys_setgid(gid_t gid)
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->gid = current->egid = current->sgid = current->fsgid = gid;
-	} else if ((gid == current->gid) || (gid == current->sgid)) {
+		cred->gid = cred->egid = cred->sgid = cred->fsgid = gid;
+	} else if ((gid == cred->gid) || (gid == cred->sgid)) {
 		if (old_egid != gid) {
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->egid = current->fsgid = gid;
+		cred->egid = cred->fsgid = gid;
 	}
 	else
 		return -EPERM;
@@ -570,7 +574,7 @@ static int set_user(uid_t new_ruid, int dumpclear)
 		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
-	current->uid = new_ruid;
+	current->cred->uid = new_ruid;
 	return 0;
 }
 
@@ -591,6 +595,7 @@ static int set_user(uid_t new_ruid, int dumpclear)
  */
 asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 {
+	struct cred *cred = current->cred;
 	int old_ruid, old_euid, old_suid, new_ruid, new_euid;
 	int retval;
 
@@ -598,14 +603,14 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 	if (retval)
 		return retval;
 
-	new_ruid = old_ruid = current->uid;
-	new_euid = old_euid = current->euid;
-	old_suid = current->suid;
+	new_ruid = old_ruid = cred->uid;
+	new_euid = old_euid = cred->euid;
+	old_suid = cred->suid;
 
 	if (ruid != (uid_t) -1) {
 		new_ruid = ruid;
 		if ((old_ruid != ruid) &&
-		    (current->euid != ruid) &&
+		    (cred->euid != ruid) &&
 		    !capable(CAP_SETUID))
 			return -EPERM;
 	}
@@ -613,8 +618,8 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 	if (euid != (uid_t) -1) {
 		new_euid = euid;
 		if ((old_ruid != euid) &&
-		    (current->euid != euid) &&
-		    (current->suid != euid) &&
+		    (cred->euid != euid) &&
+		    (cred->suid != euid) &&
 		    !capable(CAP_SETUID))
 			return -EPERM;
 	}
@@ -626,11 +631,11 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
-	current->fsuid = current->euid = new_euid;
+	cred->fsuid = cred->euid = new_euid;
 	if (ruid != (uid_t) -1 ||
 	    (euid != (uid_t) -1 && euid != old_ruid))
-		current->suid = current->euid;
-	current->fsuid = current->euid;
+		cred->suid = cred->euid;
+	cred->fsuid = cred->euid;
 
 	key_fsuid_changed(current);
 	proc_id_connector(current, PROC_EVENT_UID);
@@ -653,7 +658,8 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
  */
 asmlinkage long sys_setuid(uid_t uid)
 {
-	int old_euid = current->euid;
+	struct cred *cred = current->cred;
+	int old_euid = cred->euid;
 	int old_ruid, old_suid, new_suid;
 	int retval;
 
@@ -661,23 +667,23 @@ asmlinkage long sys_setuid(uid_t uid)
 	if (retval)
 		return retval;
 
-	old_ruid = current->uid;
-	old_suid = current->suid;
+	old_ruid = cred->uid;
+	old_suid = cred->suid;
 	new_suid = old_suid;
 	
 	if (capable(CAP_SETUID)) {
 		if (uid != old_ruid && set_user(uid, old_euid != uid) < 0)
 			return -EAGAIN;
 		new_suid = uid;
-	} else if ((uid != current->uid) && (uid != new_suid))
+	} else if ((uid != cred->uid) && (uid != new_suid))
 		return -EPERM;
 
 	if (old_euid != uid) {
 		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
-	current->fsuid = current->euid = uid;
-	current->suid = new_suid;
+	cred->fsuid = cred->euid = uid;
+	cred->suid = new_suid;
 
 	key_fsuid_changed(current);
 	proc_id_connector(current, PROC_EVENT_UID);
@@ -692,9 +698,10 @@ asmlinkage long sys_setuid(uid_t uid)
  */
 asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
 {
-	int old_ruid = current->uid;
-	int old_euid = current->euid;
-	int old_suid = current->suid;
+	struct cred *cred = current->cred;
+	int old_ruid = cred->uid;
+	int old_euid = cred->euid;
+	int old_suid = cred->suid;
 	int retval;
 
 	retval = security_task_setuid(ruid, euid, suid, LSM_SETID_RES);
@@ -702,30 +709,31 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
 		return retval;
 
 	if (!capable(CAP_SETUID)) {
-		if ((ruid != (uid_t) -1) && (ruid != current->uid) &&
-		    (ruid != current->euid) && (ruid != current->suid))
+		if ((ruid != (uid_t) -1) && (ruid != cred->uid) &&
+		    (ruid != cred->euid) && (ruid != cred->suid))
 			return -EPERM;
-		if ((euid != (uid_t) -1) && (euid != current->uid) &&
-		    (euid != current->euid) && (euid != current->suid))
+		if ((euid != (uid_t) -1) && (euid != cred->uid) &&
+		    (euid != cred->euid) && (euid != cred->suid))
 			return -EPERM;
-		if ((suid != (uid_t) -1) && (suid != current->uid) &&
-		    (suid != current->euid) && (suid != current->suid))
+		if ((suid != (uid_t) -1) && (suid != cred->uid) &&
+		    (suid != cred->euid) && (suid != cred->suid))
 			return -EPERM;
 	}
 	if (ruid != (uid_t) -1) {
-		if (ruid != current->uid && set_user(ruid, euid != current->euid) < 0)
+		if (ruid != cred->uid &&
+		    set_user(ruid, euid != cred->euid) < 0)
 			return -EAGAIN;
 	}
 	if (euid != (uid_t) -1) {
-		if (euid != current->euid) {
+		if (euid != cred->euid) {
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->euid = euid;
+		cred->euid = euid;
 	}
-	current->fsuid = current->euid;
+	cred->fsuid = cred->euid;
 	if (suid != (uid_t) -1)
-		current->suid = suid;
+		cred->suid = suid;
 
 	key_fsuid_changed(current);
 	proc_id_connector(current, PROC_EVENT_UID);
@@ -735,11 +743,12 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
 
 asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __user *suid)
 {
+	struct cred *cred = current->cred;
 	int retval;
 
-	if (!(retval = put_user(current->uid, ruid)) &&
-	    !(retval = put_user(current->euid, euid)))
-		retval = put_user(current->suid, suid);
+	if (!(retval = put_user(cred->uid, ruid)) &&
+	    !(retval = put_user(cred->euid, euid)))
+		retval = put_user(cred->suid, suid);
 
 	return retval;
 }
@@ -749,6 +758,7 @@ asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __us
  */
 asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 {
+	struct cred *cred = current->cred;
 	int retval;
 
 	retval = security_task_setgid(rgid, egid, sgid, LSM_SETID_RES);
@@ -756,28 +766,28 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 		return retval;
 
 	if (!capable(CAP_SETGID)) {
-		if ((rgid != (gid_t) -1) && (rgid != current->gid) &&
-		    (rgid != current->egid) && (rgid != current->sgid))
+		if ((rgid != (gid_t) -1) && (rgid != cred->gid) &&
+		    (rgid != cred->egid) && (rgid != cred->sgid))
 			return -EPERM;
-		if ((egid != (gid_t) -1) && (egid != current->gid) &&
-		    (egid != current->egid) && (egid != current->sgid))
+		if ((egid != (gid_t) -1) && (egid != cred->gid) &&
+		    (egid != cred->egid) && (egid != cred->sgid))
 			return -EPERM;
-		if ((sgid != (gid_t) -1) && (sgid != current->gid) &&
-		    (sgid != current->egid) && (sgid != current->sgid))
+		if ((sgid != (gid_t) -1) && (sgid != cred->gid) &&
+		    (sgid != cred->egid) && (sgid != cred->sgid))
 			return -EPERM;
 	}
 	if (egid != (gid_t) -1) {
-		if (egid != current->egid) {
+		if (egid != cred->egid) {
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->egid = egid;
+		cred->egid = egid;
 	}
-	current->fsgid = current->egid;
+	cred->fsgid = cred->egid;
 	if (rgid != (gid_t) -1)
-		current->gid = rgid;
+		cred->gid = rgid;
 	if (sgid != (gid_t) -1)
-		current->sgid = sgid;
+		cred->sgid = sgid;
 
 	key_fsgid_changed(current);
 	proc_id_connector(current, PROC_EVENT_GID);
@@ -786,11 +796,12 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 
 asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __user *sgid)
 {
+	struct cred *cred = current->cred;
 	int retval;
 
-	if (!(retval = put_user(current->gid, rgid)) &&
-	    !(retval = put_user(current->egid, egid)))
-		retval = put_user(current->sgid, sgid);
+	if (!(retval = put_user(cred->gid, rgid)) &&
+	    !(retval = put_user(cred->egid, egid)))
+		retval = put_user(cred->sgid, sgid);
 
 	return retval;
 }
@@ -804,20 +815,21 @@ asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __us
  */
 asmlinkage long sys_setfsuid(uid_t uid)
 {
+	struct cred *cred = current->cred;
 	int old_fsuid;
 
-	old_fsuid = current->fsuid;
+	old_fsuid = cred->fsuid;
 	if (security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS))
 		return old_fsuid;
 
-	if (uid == current->uid || uid == current->euid ||
-	    uid == current->suid || uid == current->fsuid || 
+	if (uid == cred->uid || uid == cred->euid ||
+	    uid == cred->suid || uid == cred->fsuid ||
 	    capable(CAP_SETUID)) {
 		if (uid != old_fsuid) {
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->fsuid = uid;
+		cred->fsuid = uid;
 	}
 
 	key_fsuid_changed(current);
@@ -833,20 +845,21 @@ asmlinkage long sys_setfsuid(uid_t uid)
  */
 asmlinkage long sys_setfsgid(gid_t gid)
 {
+	struct cred *cred = current->cred;
 	int old_fsgid;
 
-	old_fsgid = current->fsgid;
+	old_fsgid = cred->fsgid;
 	if (security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_FS))
 		return old_fsgid;
 
-	if (gid == current->gid || gid == current->egid ||
-	    gid == current->sgid || gid == current->fsgid || 
+	if (gid == cred->gid || gid == cred->egid ||
+	    gid == cred->sgid || gid == cred->fsgid ||
 	    capable(CAP_SETGID)) {
 		if (gid != old_fsgid) {
 			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
-		current->fsgid = gid;
+		cred->fsgid = gid;
 		key_fsgid_changed(current);
 		proc_id_connector(current, PROC_EVENT_GID);
 	}
@@ -1208,8 +1221,15 @@ int groups_search(struct group_info *group_info, gid_t grp)
 	return 0;
 }
 
-/* validate and set current->group_info */
-int set_current_groups(struct group_info *group_info)
+/**
+ * set_groups - Change a group subscription in a security record
+ * @sec: The security record to alter
+ * @group_info: The group list to impose
+ *
+ * Validate a group subscription and, if valid, impose it upon a task security
+ * record.
+ */
+int set_groups(struct cred *cred, struct group_info *group_info)
 {
 	int retval;
 	struct group_info *old_info;
@@ -1221,20 +1241,34 @@ int set_current_groups(struct group_info *group_info)
 	groups_sort(group_info);
 	get_group_info(group_info);
 
-	task_lock(current);
-	old_info = current->group_info;
-	current->group_info = group_info;
-	task_unlock(current);
+	spin_lock(&cred->lock);
+	old_info = cred->group_info;
+	cred->group_info = group_info;
+	spin_unlock(&cred->lock);
 
 	put_group_info(old_info);
-
 	return 0;
 }
 
+EXPORT_SYMBOL(set_groups);
+
+/**
+ * set_current_groups - Change current's group subscription
+ * @group_info: The group list to impose
+ *
+ * Validate a group subscription and, if valid, impose it upon current's task
+ * security record.
+ */
+int set_current_groups(struct group_info *group_info)
+{
+	return set_groups(current->cred, group_info);
+}
+
 EXPORT_SYMBOL(set_current_groups);
 
 asmlinkage long sys_getgroups(int gidsetsize, gid_t __user *grouplist)
 {
+	struct cred *cred = current->cred;
 	int i = 0;
 
 	/*
@@ -1246,13 +1280,13 @@ asmlinkage long sys_getgroups(int gidsetsize, gid_t __user *grouplist)
 		return -EINVAL;
 
 	/* no need to grab task_lock here; it cannot change */
-	i = current->group_info->ngroups;
+	i = cred->group_info->ngroups;
 	if (gidsetsize) {
 		if (i > gidsetsize) {
 			i = -EINVAL;
 			goto out;
 		}
-		if (groups_to_user(grouplist, current->group_info)) {
+		if (groups_to_user(grouplist, cred->group_info)) {
 			i = -EFAULT;
 			goto out;
 		}
@@ -1296,9 +1330,10 @@ asmlinkage long sys_setgroups(int gidsetsize, gid_t __user *grouplist)
  */
 int in_group_p(gid_t grp)
 {
+	struct cred *cred = current->cred;
 	int retval = 1;
-	if (grp != current->fsgid)
-		retval = groups_search(current->group_info, grp);
+	if (grp != cred->fsgid)
+		retval = groups_search(cred->group_info, grp);
 	return retval;
 }
 
@@ -1306,9 +1341,10 @@ EXPORT_SYMBOL(in_group_p);
 
 int in_egroup_p(gid_t grp)
 {
+	struct cred *cred = current->cred;
 	int retval = 1;
-	if (grp != current->egid)
-		retval = groups_search(current->group_info, grp);
+	if (grp != cred->egid)
+		retval = groups_search(cred->group_info, grp);
 	return retval;
 }
 
@@ -1624,7 +1660,9 @@ asmlinkage long sys_umask(int mask)
 asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 			  unsigned long arg4, unsigned long arg5)
 {
-	long error = 0;
+	struct task_struct *me = current;
+	unsigned char comm[sizeof(me->comm)];
+	long error;
 
 	if (security_task_prctl(option, arg2, arg3, arg4, arg5, &error))
 		return error;
@@ -1635,39 +1673,41 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 				error = -EINVAL;
 				break;
 			}
-			current->pdeath_signal = arg2;
+			me->pdeath_signal = arg2;
+			error = 0;
 			break;
 		case PR_GET_PDEATHSIG:
-			error = put_user(current->pdeath_signal, (int __user *)arg2);
+			error = put_user(me->pdeath_signal, (int __user *)arg2);
 			break;
 		case PR_GET_DUMPABLE:
-			error = get_dumpable(current->mm);
+			error = get_dumpable(me->mm);
 			break;
 		case PR_SET_DUMPABLE:
 			if (arg2 < 0 || arg2 > 1) {
 				error = -EINVAL;
 				break;
 			}
-			set_dumpable(current->mm, arg2);
+			set_dumpable(me->mm, arg2);
+			error = 0;
 			break;
 
 		case PR_SET_UNALIGN:
-			error = SET_UNALIGN_CTL(current, arg2);
+			error = SET_UNALIGN_CTL(me, arg2);
 			break;
 		case PR_GET_UNALIGN:
-			error = GET_UNALIGN_CTL(current, arg2);
+			error = GET_UNALIGN_CTL(me, arg2);
 			break;
 		case PR_SET_FPEMU:
-			error = SET_FPEMU_CTL(current, arg2);
+			error = SET_FPEMU_CTL(me, arg2);
 			break;
 		case PR_GET_FPEMU:
-			error = GET_FPEMU_CTL(current, arg2);
+			error = GET_FPEMU_CTL(me, arg2);
 			break;
 		case PR_SET_FPEXC:
-			error = SET_FPEXC_CTL(current, arg2);
+			error = SET_FPEXC_CTL(me, arg2);
 			break;
 		case PR_GET_FPEXC:
-			error = GET_FPEXC_CTL(current, arg2);
+			error = GET_FPEXC_CTL(me, arg2);
 			break;
 		case PR_GET_TIMING:
 			error = PR_TIMING_STATISTICAL;
@@ -1675,33 +1715,28 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 		case PR_SET_TIMING:
 			if (arg2 != PR_TIMING_STATISTICAL)
 				error = -EINVAL;
+			else
+				error = 0;
 			break;
 
-		case PR_SET_NAME: {
-			struct task_struct *me = current;
-			unsigned char ncomm[sizeof(me->comm)];
-
-			ncomm[sizeof(me->comm)-1] = 0;
-			if (strncpy_from_user(ncomm, (char __user *)arg2,
-						sizeof(me->comm)-1) < 0)
+		case PR_SET_NAME:
+			comm[sizeof(me->comm)-1] = 0;
+			if (strncpy_from_user(comm, (char __user *)arg2,
+					      sizeof(me->comm) - 1) < 0)
 				return -EFAULT;
-			set_task_comm(me, ncomm);
+			set_task_comm(me, comm);
 			return 0;
-		}
-		case PR_GET_NAME: {
-			struct task_struct *me = current;
-			unsigned char tcomm[sizeof(me->comm)];
-
-			get_task_comm(tcomm, me);
-			if (copy_to_user((char __user *)arg2, tcomm, sizeof(tcomm)))
+		case PR_GET_NAME:
+			get_task_comm(comm, me);
+			if (copy_to_user((char __user *)arg2, comm,
+					 sizeof(comm)))
 				return -EFAULT;
 			return 0;
-		}
 		case PR_GET_ENDIAN:
-			error = GET_ENDIAN(current, arg2);
+			error = GET_ENDIAN(me, arg2);
 			break;
 		case PR_SET_ENDIAN:
-			error = SET_ENDIAN(current, arg2);
+			error = SET_ENDIAN(me, arg2);
 			break;
 
 		case PR_GET_SECCOMP:
@@ -1725,6 +1760,7 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 					current->default_timer_slack_ns;
 			else
 				current->timer_slack_ns = arg2;
+			error = 0;
 			break;
 		default:
 			error = -EINVAL;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 9f3b478..5c97c5b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -246,7 +246,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
 
 	memcpy(data->comm, tsk->comm, TASK_COMM_LEN);
 	data->pid = tsk->pid;
-	data->uid = tsk->uid;
+	data->uid = task_uid(tsk);
 	data->nice = tsk->static_prio - 20 - MAX_RT_PRIO;
 	data->policy = tsk->policy;
 	data->rt_priority = tsk->rt_priority;
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 8ebcd85..6d1ed07 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -53,8 +53,8 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
 		stats->ac_flag |= AXSIG;
 	stats->ac_nice	 = task_nice(tsk);
 	stats->ac_sched	 = tsk->policy;
-	stats->ac_uid	 = tsk->uid;
-	stats->ac_gid	 = tsk->gid;
+	stats->ac_uid	 = tsk->cred->uid;
+	stats->ac_gid	 = tsk->cred->gid;
 	stats->ac_pid	 = tsk->pid;
 	rcu_read_lock();
 	stats->ac_ppid	 = pid_alive(tsk) ?
diff --git a/kernel/uid16.c b/kernel/uid16.c
index 3e41c16..71f07fc 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -86,9 +86,9 @@ asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid,
 {
 	int retval;
 
-	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
-	    !(retval = put_user(high2lowuid(current->euid), euid)))
-		retval = put_user(high2lowuid(current->suid), suid);
+	if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) &&
+	    !(retval = put_user(high2lowuid(current->cred->euid), euid)))
+		retval = put_user(high2lowuid(current->cred->suid), suid);
 
 	return retval;
 }
@@ -106,9 +106,9 @@ asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid,
 {
 	int retval;
 
-	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
-	    !(retval = put_user(high2lowgid(current->egid), egid)))
-		retval = put_user(high2lowgid(current->sgid), sgid);
+	if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) &&
+	    !(retval = put_user(high2lowgid(current->cred->egid), egid)))
+		retval = put_user(high2lowgid(current->cred->sgid), sgid);
 
 	return retval;
 }
@@ -166,20 +166,20 @@ asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist)
 	if (gidsetsize < 0)
 		return -EINVAL;
 
-	get_group_info(current->group_info);
-	i = current->group_info->ngroups;
+	get_group_info(current->cred->group_info);
+	i = current->cred->group_info->ngroups;
 	if (gidsetsize) {
 		if (i > gidsetsize) {
 			i = -EINVAL;
 			goto out;
 		}
-		if (groups16_to_user(grouplist, current->group_info)) {
+		if (groups16_to_user(grouplist, current->cred->group_info)) {
 			i = -EFAULT;
 			goto out;
 		}
 	}
 out:
-	put_group_info(current->group_info);
+	put_group_info(current->cred->group_info);
 	return i;
 }
 
@@ -210,20 +210,20 @@ asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist)
 
 asmlinkage long sys_getuid16(void)
 {
-	return high2lowuid(current->uid);
+	return high2lowuid(current->cred->uid);
 }
 
 asmlinkage long sys_geteuid16(void)
 {
-	return high2lowuid(current->euid);
+	return high2lowuid(current->cred->euid);
 }
 
 asmlinkage long sys_getgid16(void)
 {
-	return high2lowgid(current->gid);
+	return high2lowgid(current->cred->gid);
 }
 
 asmlinkage long sys_getegid16(void)
 {
-	return high2lowgid(current->egid);
+	return high2lowgid(current->cred->egid);
 }
diff --git a/kernel/user.c b/kernel/user.c
index 39d6159..104d22a 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -457,11 +457,11 @@ void switch_uid(struct user_struct *new_user)
 	 * cheaply with the new uid cache, so if it matters
 	 * we should be checking for it.  -DaveM
 	 */
-	old_user = current->user;
+	old_user = current->cred->user;
 	atomic_inc(&new_user->processes);
 	atomic_dec(&old_user->processes);
 	switch_uid_keyring(new_user);
-	current->user = new_user;
+	current->cred->user = new_user;
 	sched_switch_user(current);
 
 	/*