From: Akinobu Mita <akinobu.mita@gmail.com>
Date: Wed, 2 Mar 2011 11:35:28 +0000 (+0900)
Subject: wusb: fix find_first_zero_bit() return value check
X-Git-Tag: v2.6.39-rc1~472^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=962f3ffa927f2e777a4193843c45ffa6e52ff4b6;p=pandora-kernel.git

wusb: fix find_first_zero_bit() return value check

In wusb_cluster_id_get(), if no zero bits exist in wusb_cluster_id_table,
find_first_zero_bit() returns CLUSTER_IDS.

But it is impossible to detect that the bitmap is full because there
is an off-by-one error in the return value check.  It will cause
unexpected memory access by setting bit out of wusb_cluster_id_table
bitmap, and caller will get wrong cluster id.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: linux-usb@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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