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From 7adc5cbc25dcc47dc3856108d9823d08da75da9d Mon Sep 17 00:00:00 2001
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From: Kangjie Lu <kangjielu@gmail.com>
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Date: Tue, 3 May 2016 16:32:16 -0400
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Subject: [PATCH] USB: usbfs: fix potential infoleak in devio
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The stack object “ci” has a total size of 8 bytes. Its last 3 bytes
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are padding bytes which are not initialized and leaked to userland
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via “copy_to_user”.
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Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/usb/core/devio.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
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index 52c4461dfccd..9b7f1f75e887 100644
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--- a/drivers/usb/core/devio.c
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+++ b/drivers/usb/core/devio.c
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@@ -1316,10 +1316,11 @@ static int proc_getdriver(struct usb_dev_state *ps, void __user *arg)
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static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg)
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{
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- struct usbdevfs_connectinfo ci = {
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- .devnum = ps->dev->devnum,
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- .slow = ps->dev->speed == USB_SPEED_LOW
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- };
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+ struct usbdevfs_connectinfo ci;
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+
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+ memset(&ci, 0, sizeof(ci));
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+ ci.devnum = ps->dev->devnum;
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+ ci.slow = ps->dev->speed == USB_SPEED_LOW;
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if (copy_to_user(arg, &ci, sizeof(ci)))
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return -EFAULT;
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--
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2.5.5
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