tree 40edc31af2f6dc5a7d9ee15de153662de6a9158e
parent bcdbeb844773333d2d1c08004f3b3e25921040e5
author Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1481009789 +0100
committer Felipe Balbi <felipe.balbi@linux.intel.com> 1483347328 +0200

usb: gadgetfs: restrict upper bound on device configuration size

Andrey Konovalov reported that we were not properly checking the upper
limit before of a device configuration size before calling
memdup_user(), which could cause some problems.

So set the upper limit to PAGE_SIZE * 4, which should be good enough for
all devices.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>