From: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Fri, 14 Dec 2012 11:03:10 +0000 (+0400)
Subject: EDAC: Fix kernel panic on module unloading
X-Git-Tag: v3.8-rc3~2^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=311bd84247ee0bedae6cdfbfc5e2c3450f9decd1;p=pandora-kernel.git

EDAC: Fix kernel panic on module unloading

This patch fixes use-after-free and double-free bugs in
edac_mc_sysfs_exit(). mci_pdev has single reference and put_device()
calls mc_attr_release() which calls kfree(). The following
device_del() works with already released memory. An another kfree() in
edac_mc_sysfs_exit() releses the same memory again. Great.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: stable@vger.kernel.org # 3.[67]
Cc: Denis Kirjanov <kirjanov@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Link: http://lkml.kernel.org/r/20121214110310.11019.21098.stgit@zurg
Signed-off-by: Borislav Petkov <bp@alien8.de>
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