Messages in this thread Patch in this message | | | From | Theodore Ts'o <> | Subject | [PATCH 04/10] usb: feed USB device information to the /dev/random driver | Date | Thu, 5 Jul 2012 14:12:07 -0400 |
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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> Cc: stable@kernel.org --- drivers/usb/core/hub.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 25a7422..24d0870 100644 --- 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> @@ -2173,6 +2174,14 @@ 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)); + device_enable_async_suspend(&udev->dev); /* -- 1.7.11.1.108.gb129051
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