1 files changed, 24 insertions, 34 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 6a0cc71ee88d..e423d0d9e6ff 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1545,6 +1545,19 @@ out:
  *
  */
 
+static void accumulate_thread_rusage(struct task_struct *t, struct rusage *r,
+                                     cputime_t *utimep, cputime_t *stimep)
+{
+        *utimep = cputime_add(*utimep, t->utime);
+        *stimep = cputime_add(*stimep, t->stime);
+        r->ru_nvcsw += t->nvcsw;
+        r->ru_nivcsw += t->nivcsw;
+        r->ru_minflt += t->min_flt;
+        r->ru_majflt += t->maj_flt;
+        r->ru_inblock += task_io_get_inblock(t);
+        r->ru_oublock += task_io_get_oublock(t);
+}
+
 static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 {
         struct task_struct *t;
@@ -1554,6 +1567,11 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
         memset((char *) r, 0, sizeof *r);
         utime = stime = cputime_zero;
 
+        if (who == RUSAGE_THREAD) {
+                accumulate_thread_rusage(p, r, &utime, &stime);
+                goto out;
+        }
+
         rcu_read_lock();
         if (!lock_task_sighand(p, &flags)) {
                 rcu_read_unlock();
@@ -1586,14 +1604,7 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
                         r->ru_oublock += p->signal->oublock;
                         t = p;
                         do {
-                                utime = cputime_add(utime, t->utime);
-                                stime = cputime_add(stime, t->stime);
-                                r->ru_nvcsw += t->nvcsw;
-                                r->ru_nivcsw += t->nivcsw;
-                                r->ru_minflt += t->min_flt;
-                                r->ru_majflt += t->maj_flt;
-                                r->ru_inblock += task_io_get_inblock(t);
-                                r->ru_oublock += task_io_get_oublock(t);
+                                accumulate_thread_rusage(t, r, &utime, &stime);
                                 t = next_thread(t);
                         } while (t != p);
                         break;
@@ -1605,6 +1616,7 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
         unlock_task_sighand(p, &flags);
         rcu_read_unlock();
 
+out:
         cputime_to_timeval(utime, &r->ru_utime);
         cputime_to_timeval(stime, &r->ru_stime);
 }
@@ -1618,7 +1630,8 @@ int getrusage(struct task_struct *p, int who, struct rusage __user *ru)
 
 asmlinkage long sys_getrusage(int who, struct rusage __user *ru)
 {
-        if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
+        if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN &&
+            who != RUSAGE_THREAD)
                 return -EINVAL;
         return getrusage(current, who, ru);
 }
@@ -1632,10 +1645,9 @@ 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;
+        long uninitialized_var(error);
 
-        error = security_task_prctl(option, arg2, arg3, arg4, arg5);
-        if (error)
+        if (security_task_prctl(option, arg2, arg3, arg4, arg5, &error))
                 return error;
 
         switch (option) {
@@ -1688,17 +1700,6 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                                 error = -EINVAL;
                         break;
 
-                case PR_GET_KEEPCAPS:
-                        if (current->keep_capabilities)
-                                error = 1;
-                        break;
-                case PR_SET_KEEPCAPS:
-                        if (arg2 != 0 && arg2 != 1) {
-                                error = -EINVAL;
-                                break;
-                        }
-                        current->keep_capabilities = arg2;
-                        break;
                 case PR_SET_NAME: {
                         struct task_struct *me = current;
                         unsigned char ncomm[sizeof(me->comm)];
@@ -1732,17 +1733,6 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                 case PR_SET_SECCOMP:
                         error = prctl_set_seccomp(arg2);
                         break;
-
-                case PR_CAPBSET_READ:
-                        if (!cap_valid(arg2))
-                                return -EINVAL;
-                        return !!cap_raised(current->cap_bset, arg2);
-                case PR_CAPBSET_DROP:
-#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
-                        return cap_prctl_drop(arg2);
-#else
-                        return -EINVAL;
-#endif
                 case PR_GET_TSC:
                         error = GET_TSC_CTL(arg2);
                         break;