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

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Date:	Fri, 14 Dec 2012 11:26:57 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
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

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.


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