vt_ioctl: return -EFAULT on copy_from_user errors

copy_from_user() returns the number of bytes remaining but we want to return a negative error code here. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
git-mirror · Jun 4, 2010 · 3fde85d · 3fde85d
1 parent c1bfffa
commit 3fde85d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
@@ -1303,7 +1303,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 		if (!perm)
 			goto eperm;
 		ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
-		if (!ret)
+		if (ret)
+			ret = -EFAULT;
+		else
 			con_clear_unimap(vc, &ui);
 		break;
 	      }