From: Salva Peiró <speiro@ai2.upv.es>
Date: Mon, 3 Mar 2014 07:44:04 +0000 (+0100)
Subject: staging/cxt1e1/linux.c: Correct arbitrary memory write in c4_ioctl()
X-Git-Tag: v3.14-rc6~4^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=084b6e7765b9554699afa23a50e702a3d0ae4b24;p=pandora-kernel.git

staging/cxt1e1/linux.c: Correct arbitrary memory write in c4_ioctl()

The function c4_ioctl() writes data from user in ifr->ifr_data
to the kernel struct data arg, without any iolen bounds checking.
This can lead to a arbitrary write outside of the struct data arg.
Corrected by adding bounds-checking of iolen before the copy_from_user().

Signed-off-by: Salva Peiró <speiro@ai2.upv.es>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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