usb: gadgetfs: restrict upper bound on device configuration size

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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>

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Greg Kroah-Hartman 2016-12-06 08:36:29 +01:00 • committed by Felipe Balbi

parent bcdbeb8447

commit 0994b0a257

1 changed files with 2 additions and 1 deletions

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drivers/usb/gadget/legacy/inode.c

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