3 files changed, 9 insertions, 3 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 6d2089a1bc..ee6d8b8abe 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -371,6 +371,12 @@ static inline void close_files(struct files_struct * files)
         struct fdtable *fdt;
 
         j = 0;
+
+        /*
+         * It is safe to dereference the fd table without RCU or
+         * ->file_lock because this is the last reference to the
+         * files structure.
+         */
         fdt = files_fdtable(files);
         for (;;) {
                 unsigned long set;
diff --git a/kernel/fork.c b/kernel/fork.c
index 8149f36028..533ce27f4b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1062,7 +1062,8 @@ static task_t *copy_process(unsigned long clone_flags,
          * parent's CPU). This avoids alot of nasty races.
          */
         p->cpus_allowed = current->cpus_allowed;
-        if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed)))
+        if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) ||
+                        !cpu_online(task_cpu(p))))
                 set_task_cpu(p, smp_processor_id());
 
         /*
diff --git a/kernel/sys.c b/kernel/sys.c
index c80412be23..f723522e69 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1728,8 +1728,7 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                         error = put_user(current->pdeath_signal, (int __user *)arg2);
                         break;
                 case PR_GET_DUMPABLE:
-                        if (current->mm->dumpable)
-                                error = 1;
+                        error = current->mm->dumpable;
                         break;
                 case PR_SET_DUMPABLE:
                         if (arg2 < 0 || arg2 > 2) {