From: Roland Dreier <roland@purestorage.com>
Date: Wed, 31 Oct 2012 16:16:45 +0000 (-0700)
Subject: target: Avoid integer overflow in se_dev_align_max_sectors()
X-Git-Tag: v3.2.34~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca8b38a5d0489f39245404acea9a1524b29d1cbb;p=pandora-kernel.git

target: Avoid integer overflow in se_dev_align_max_sectors()

commit 3e03989b5868acf69a391a424dc71fcd6cc48167 upstream.

The expression (max_sectors * block_size) might overflow a u32
(indeed, since iblock sets max_hw_sectors to UINT_MAX, it is
guaranteed to overflow and end up with a much-too-small result in many
common cases).  Fix this by doing an equivalent calculation that
doesn't require multiplication.

While we're touching this code, avoid splitting a printk format across
two lines and use pr_info(...) instead of printk(KERN_INFO ...).

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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