From: Vasiliy Kulikov <segoon@openwall.com>
Date: Sat, 19 Feb 2011 13:18:08 +0000 (+0100)
Subject: ACPI / debugfs: Fix buffer overflows, double free
X-Git-Tag: v2.6.38-rc8~42^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2949ad50711cc161721cf788711722eeeca33764;p=pandora-kernel.git

ACPI / debugfs: Fix buffer overflows, double free

File position is not controlled, it may lead to overwrites of arbitrary
kernel memory.  Also the code may kfree() the same pointer multiple
times.

One more flaw is still present: if multiple processes open the file then
all 3 static variables are shared, leading to various race conditions.
They should be moved to file->private_data.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Reviewed-by: Eugene Teo <eugeneteo@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---

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