linux-kernel - Re: [PATCH] firmware: arm_scmi: quirk: fix write to string constant

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Message-ID: <20250902-original-hallowed-robin-d030bf@sudeepholla>
Date: Tue, 2 Sep 2025 12:18:37 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Johan Hovold <johan@...nel.org>
Cc: Cristian Marussi <cristian.marussi@....com>, arm-scmi@...r.kernel.org,
	Sudeep Holla <sudeep.holla@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, Jan Palus <jpalus@...tmail.com>
Subject: Re: [PATCH] firmware: arm_scmi: quirk: fix write to string constant

On Tue, Sep 02, 2025 at 12:27:45PM +0200, Johan Hovold wrote:
> On Tue, Sep 02, 2025 at 11:16:46AM +0100, Sudeep Holla wrote:
> > On Tue, Sep 02, 2025 at 11:59:24AM +0200, Johan Hovold wrote:
> > > On Fri, Aug 29, 2025 at 04:29:48PM +0200, Johan Hovold wrote:
> > > > On Fri, Aug 29, 2025 at 03:21:52PM +0200, Johan Hovold wrote:
> 
> > > > > The quirk version range is typically a string constant and must not be
> > > > > modified (e.g. as it may be stored in read-only memory):
> > > > > 
> > > > > 	Unable to handle kernel write to read-only memory at virtual
> > > > > 	address ffffc036d998a947
> > > > > 
> > > > > Fix the range parsing so that it operates on a copy of the version range
> > > > > string, and mark all the quirk strings as const to reduce the risk of
> > > > > introducing similar future issues.
> > > > 
> > > > With Jan's permission, let's add:
> > > > 
> > > > Reported-by: Jan Palus <jpalus@...tmail.com>
> > > > 
> > 
> > I was hoping to hear back, but I assume silence is kind of acceptance.
> 
> I sent the reply with the tag after making sure off-list that Jan was OK
> with it. Sorry if that was not clear.
> 
> > > Please don't do such (non-trivial) changes without making that clear
> > > in the commit message before your Signed-off-by tag:
> > > 
> > > 	[ sudeep: rewrite commit message; switch to cleanup helpers ]
> > > 
> > 
> > Sorry I meant to do that when I replied and asked you if you are OK
> > with cleanup helpers. Also yes I planned to add a line like something
> > above before finalizing.
> 
> Sounds like a mail has gotten lost since I never saw that question from
> you.
>

No I hadn't sent it yet, generally wait for builder report to finalise
the commit. Sometimes -next integration happens before build sends build
report for my branch and that happened this time.

-- 
Regards,
Sudeep