Commit d86264c4 authored by Theodore Ts'o's avatar Theodore Ts'o Committed by Willy Tarreau

usb: feed USB device information to the /dev/random driver

commit b04b3156 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: default avatarGreg KH <greg@kroah.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
parent f2652a50
......@@ -23,6 +23,7 @@
#include <linux/mutex.h>
#include <linux/freezer.h>
#include <linux/usb/quirks.h>
#include <linux/random.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
......@@ -1831,6 +1832,14 @@ int usb_new_device(struct usb_device *udev)
/* 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));
/* Register the device. The device driver is responsible
* for configuring the device and invoking the add-device
* notifier chain (used by usbfs and possibly others).
......
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