lkml.org 
[lkml]   [2012]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[ 17/70] usb: feed USB device information to the /dev/random driver
    3.2-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Theodore Ts'o <tytso@mit.edu>

    commit b04b3156a20d395a7faa8eed98698d1e17a36000 upstream.

    Send the USB device's serial, product, and manufacturer strings to the
    /dev/random driver to help seed its pools.

    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Acked-by: Greg KH <greg@kroah.com>
    Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/usb/core/hub.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    --- a/drivers/usb/core/hub.c
    +++ b/drivers/usb/core/hub.c
    @@ -24,6 +24,7 @@
    #include <linux/kthread.h>
    #include <linux/mutex.h>
    #include <linux/freezer.h>
    +#include <linux/random.h>

    #include <asm/uaccess.h>
    #include <asm/byteorder.h>
    @@ -1897,6 +1898,14 @@ int usb_new_device(struct usb_device *ud
    /* Tell the world! */
    announce_device(udev);

    + if (udev->serial)
    + add_device_randomness(udev->serial, strlen(udev->serial));
    + if (udev->product)
    + add_device_randomness(udev->product, strlen(udev->product));
    + if (udev->manufacturer)
    + add_device_randomness(udev->manufacturer,
    + strlen(udev->manufacturer));
    +
    device_enable_async_suspend(&udev->dev);
    /* Register the device. The device driver is responsible
    * for configuring the device and invoking the add-device



    \
     
     \ /
      Last update: 2012-08-07 06:44    [W:4.186 / U:0.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site