From 681fef8380eb818c0b845fca5d2ab1dcbab114ee Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Tue, 3 May 2016 16:32:16 -0400 Subject: USB: usbfs: fix potential infoleak in devio MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The stack object “ci” has a total size of 8 bytes. Its last 3 bytes are padding bytes which are not initialized and leaked to userland via “copy_to_user”. Signed-off-by: Kangjie Lu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 73ce871..e9f5043 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1316,10 +1316,11 @@ static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) { - struct usbdevfs_connectinfo ci = { - .devnum = ps->dev->devnum, - .slow = ps->dev->speed == USB_SPEED_LOW - }; + struct usbdevfs_connectinfo ci; + + memset(&ci, 0, sizeof(ci)); + ci.devnum = ps->dev->devnum; + ci.slow = ps->dev->speed == USB_SPEED_LOW; if (copy_to_user(arg, &ci, sizeof(ci))) return -EFAULT; -- cgit v1.1