diff options
| author | Vasiliy Kulikov <segooon@gmail.com> | 2010-11-06 17:41:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-21 12:44:01 -0700 |
| commit | 9f34fd7e76428bdd07f4ad10320b06f53b0b6ab2 (patch) | |
| tree | 619af876692d5caaf7aea8274d55568c34df82e0 /drivers | |
| parent | d66dbddd744d6bd67258bbc89dc01b4704374ff2 (diff) | |
usb: core: fix information leak to userland
commit 886ccd4520064408ce5876cfe00554ce52ecf4a7 upstream.
Structure usbdevfs_connectinfo is copied to userland with padding byted
after "slow" field uninitialized. It leads to leaking of contents of
kernel stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/devio.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 4fd67d69b83..6332fbb52e3 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -946,10 +946,11 @@ static int proc_getdriver(struct dev_state *ps, void __user *arg) static int proc_connectinfo(struct dev_state *ps, void __user *arg) { - struct usbdevfs_connectinfo ci; + struct usbdevfs_connectinfo ci = { + .devnum = ps->dev->devnum, + .slow = ps->dev->speed == USB_SPEED_LOW + }; - ci.devnum = ps->dev->devnum; - ci.slow = ps->dev->speed == USB_SPEED_LOW; if (copy_to_user(arg, &ci, sizeof(ci))) return -EFAULT; return 0; |