From: Andre Noll <maan@systemlinux.org>
Date: Mon, 21 Jul 2008 04:42:07 +0000 (+1000)
Subject: md: Fix check for overlapping devices.
X-Git-Tag: v2.6.27-rc1~957^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d07bd3bcc456228b56a790897162a634691fed9b;p=pandora-kernel.git

md: Fix check for overlapping devices.

The checks in overlaps() expect all parameters either in block-based
or sector-based quantities. However, its single caller passes two
rdev->data_offset arguments as well as two rdev->size arguments, the
former being sector counts while the latter are measured in 1K blocks.

This could cause rdev_size_store() to accept an invalid size from user
space. Fix it by passing only sector-based quantities to overlaps().

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
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