linux-kernel - Re: [PATCH 12/12] edac: fix kernel panic on module unloading

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Message-ID: <50CB13B5.6090203@openvz.org>
Date:	Fri, 14 Dec 2012 15:55:33 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	linux-kernel@...r.kernel.org, Denis Kirjanov <kirjanov@...il.com>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 12/12] edac: fix kernel panic on module unloading

Alan Cox wrote:
> On Fri, 14 Dec 2012 15:03:10 +0400
> Konstantin Khlebnikov<khlebnikov@...nvz.org>  wrote:
>
>> 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(), thus following device_del() works with already released memory.
>> An another kfree() in edac_mc_sysfs_exit() releses the same memory again. Great.
>
> Patches for this were posted a while ago by Jean Delvare. See bugzilla
> 50491 as well for this.
>

Seems like this is different bugs, that was in "i7core_edac", this one in "edac_core"

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