linux-kernel - Re: [PATCH] Sanitize possible_parent_show to Handle Return Value of of_clk_get_parent

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Message-ID: <f72f0a599fa5ca03321454fd14dd8856.sboyd@kernel.org>
Date:   Tue, 12 Sep 2023 10:59:51 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Alessandro Carminati <alessandro.carminati@...il.com>
Cc:     Philip Daly <pdaly@...hat.com>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Sanitize possible_parent_show to Handle Return Value of of_clk_get_parent_name

Quoting Alessandro Carminati (2023-09-12 10:05:19)
> Il giorno ven 8 set 2023 alle ore 23:25 Stephen Boyd
> <sboyd@...nel.org> ha scritto:
> >
> > Is nothing actually wrong? And this is a speculative patch?
> 
> In the current state, Linux can crash, so I would say that there's something
> wrong.
> I submitted this patch in response to a specific bug report that caused a
> kernel crash during testing.

Where is the bug report? On some public tracker? Can you link to it?

> 
> >
> > All other arms of this conditional statement check the validity of the
> > pointer before printing the string. And when the parent isn't known we
> > print "(missing)", so it looks like we should do that instead. How about
> > this patch?
> 
> Indeed, your patch appears to provide a more verbose coding and accurate
> message, which is valuable for troubleshooting.
> So yeah, for what it is worth, I think it is good as well.

Cool, can you send it after testing it out?