Char: vt_ioctl, fix BKL imbalance

Stanse found (again) a BKL imbalance in vt_ioctl.

It's easily triggerable by ioctl(dev_tty_fd, VT_SETACTIVATE, NULL);

Introduced by

commit d3b5cffcf84a8bdc7073dce4745d67c72629af85                                 Author: Alan Cox <alan@linux.intel.com>
Date:   Sat Sep 19 13:13:26 2009 -0700

    vt: add an activate and lock

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 29c651ab0d78..6b36ee56e6fe 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -981,8 +981,10 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
                         goto eperm;
 
                 if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg,
-                                                sizeof(struct vt_setactivate)))
-                        return -EFAULT;
+                                        sizeof(struct vt_setactivate))) {
+                        ret = -EFAULT;
+                        goto out;
+                }
                 if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES)
                         ret = -ENXIO;
                 else {