USB: usbfs: only copy the actual data received
authorGreg KH <greg@kroah.com>
Mon, 15 Feb 2010 17:37:46 +0000 (09:37 -0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 16 Feb 2010 23:11:01 +0000 (15:11 -0800)
commitd4a4683ca054ed9917dfc9e3ff0f7ecf74ad90d6
tree087b4ad7f541d166147f85941020bfbccfa3b0ba
parent0813e22d4e0d618eac9b47bec942bf856adca4c5
USB: usbfs: only copy the actual data received

We need to only copy the data received by the device to userspace, not
the whole kernel buffer, which can contain "stale" data.

Thanks to Marcus Meissner for pointing this out and testing the fix.

Reported-by: Marcus Meissner <meissner@suse.de>
Tested-by: Marcus Meissner <meissner@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/devio.c