From: Xi Wang <xi.wang@gmail.com>
Date: Mon, 9 Apr 2012 19:48:45 +0000 (-0400)
Subject: usb: usbtest: avoid integer overflow in alloc_sglist()
X-Git-Tag: v3.4-rc4~14^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8bde9a62ee74afa89f593c563e926d163b1f6ada;p=pandora-kernel.git

usb: usbtest: avoid integer overflow in alloc_sglist()

A large `nents' from userspace could overflow the allocation size,
leading to memory corruption.

| alloc_sglist()
| usbtest_ioctl()

Use kmalloc_array() to avoid the overflow.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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