1 files changed, 9 insertions, 8 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 241507f23eca..c5cb5b99cb81 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -368,6 +368,7 @@ EXPORT_SYMBOL(unregister_reboot_notifier);
 void kernel_restart(char *cmd)
 {
         kernel_restart_prepare(cmd);
+        disable_nonboot_cpus();
         if (!cmd)
                 printk(KERN_EMERG "Restarting system.\n");
         else
@@ -1788,15 +1789,15 @@ SYSCALL_DEFINE1(umask, int, mask)
 #ifdef CONFIG_CHECKPOINT_RESTORE
 static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
 {
-        struct file *exe_file;
+        struct fd exe;
         struct dentry *dentry;
         int err;
 
-        exe_file = fget(fd);
-        if (!exe_file)
+        exe = fdget(fd);
+        if (!exe.file)
                 return -EBADF;
 
-        dentry = exe_file->f_path.dentry;
+        dentry = exe.file->f_path.dentry;
 
         /*
          * Because the original mm->exe_file points to executable file, make
@@ -1805,7 +1806,7 @@ static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
          */
         err = -EACCES;
         if (!S_ISREG(dentry->d_inode->i_mode)   ||
-            exe_file->f_path.mnt->mnt_flags & MNT_NOEXEC)
+            exe.file->f_path.mnt->mnt_flags & MNT_NOEXEC)
                 goto exit;
 
         err = inode_permission(dentry->d_inode, MAY_EXEC);
@@ -1839,12 +1840,12 @@ static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
                 goto exit_unlock;
 
         err = 0;
-        set_mm_exe_file(mm, exe_file);
+        set_mm_exe_file(mm, exe.file);  /* this grabs a reference to exe.file */
 exit_unlock:
         up_write(&mm->mmap_sem);
 
 exit:
-        fput(exe_file);
+        fdput(exe);
         return err;
 }
 
@@ -2204,7 +2205,7 @@ static int __orderly_poweroff(void)
                 return -ENOMEM;
         }
 
-        ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_NO_WAIT,
+        ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC,
                                       NULL, argv_cleanup, NULL);
         if (ret == -ENOMEM)
                 argv_free(argv);