linux-kernel - Re: [PATCH] kernfs: fix a crash when two processes delete the same directory

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Message-ID: <alpine.LRH.2.02.2209271206240.5208@file01.intranet.prod.int.rdu2.redhat.com>
Date:   Tue, 27 Sep 2022 12:09:19 -0400 (EDT)
From:   Mikulas Patocka <mpatocka@...hat.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Milan Broz <gmazyland@...il.com>, dm-devel@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernfs: fix a crash when two processes delete the same
 directory



On Mon, 26 Sep 2022, Greg Kroah-Hartman wrote:

> Can you see if 4abc99652812 ("kernfs: fix use-after-free in
> __kernfs_remove") in linux-next fixes this for you or not?  It seems to
> be the same issue, as was also reported at:
> 	https://lore.kernel.org/r/7f489b14-2fdc-3d91-c87e-6a802bd8592d@I-love.SAKURA.ne.jp
> 
> thanks,
> 
> greg k-h

I'm running the test with the patch 4abc99652812 for 3 hours, no crash, so 
it's probably ok.

Tested-by: Mikulas Patocka <mpatocka@...hat.com>

Mikulas