linux-kernel - Re: [v2] platform/x86: ISST: fix use-after-free in tpmi_sst_dev

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Date: Tue, 21 May 2024 13:06:11 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Markus Elfring <Markus.Elfring@....de>
cc: Hans de Goede <hdegoede@...hat.com>, 
    Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>, 
    platform-driver-x86@...r.kernel.org, kernel-janitors@...r.kernel.org, 
    Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, 
    Zhang Rui <rui.zhang@...el.com>, LKML <linux-kernel@...r.kernel.org>, 
    Dan Carpenter <dan.carpenter@...aro.org>, 
    Dan Carpenter <error27@...il.com>
Subject: Re: [v2] platform/x86: ISST: fix use-after-free in
 tpmi_sst_dev_remove()

On Tue, 21 May 2024, Markus Elfring wrote:

> >>>> …
> >>>>> Fix this by reordering the kfree() post the dereference.
> …
> > The original wording of the commit message really is fine as is,
> > I see no need for Harshit to send a new version and I plan to
> > merge this as is.
> 
> Are there opportunities remaining to improve the discussed wording?
> 
> 1. https://en.wiktionary.org/wiki/post#Etymology_1
> 
> 2. https://en.wiktionary.org/wiki/reorder
> 
> 3. Function call indication?
>    https://elixir.bootlin.com/linux/v6.9.1/source/mm/slub.c#L4371
> 
> 4. Rephrasing of “Fix this by …”?
> 
> 5. https://en.wikipedia.org/wiki/Dangling_pointer#Cause_of_dangling_pointers
> 
> 6. https://wiki.sei.cmu.edu/confluence/display/c/MEM30-C.+Do+not+access+freed+memory#MEM30C.Donotaccessfreedmemory-AutomatedDetection
> 
> 7. https://en.wikipedia.org/wiki/Code_sanitizer#KernelAddressSanitizer

We'll not waste our time in wordsmithing commit messages to perfection, 
the current one is good enough as was stated to you already.

-- 
 i.