linux-kernel - Re: [PATCH v2] arm: fix uninitialized pointers with free attr

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Message-ID: <20251203-angelic-enlightened-coyote-cde8ae@sudeepholla>
Date: Wed, 3 Dec 2025 15:51:56 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: Ally Heev <allyheev@...il.com>
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,
	Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [PATCH v2] arm: fix uninitialized pointers with free attr

On Wed, Dec 03, 2025 at 08:52:34PM +0530, Ally Heev wrote:
> Uninitialized pointers with `__free` attribute can cause undefined
> behaviour as the memory assigned(randomly) to the pointer is freed
> automatically when the pointer goes out of scope
> 
> arm doesn't have any bugs related to this as of now, but
> it is better to initialize and assign pointers with `__free` attr
> in one statement to ensure proper scope-based cleanup
> 
> Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> Closes: https://lore.kernel.org/all/aPiG_F5EBQUjZqsl@stanley.mountain/
> Signed-off-by: Ally Heev <allyheev@...il.com>
> Reviewed-by: Cristian Marussi <cristian.marussi@....com>
> ---
> Changes in v2:
> - added Reviewed-by trailer

Ideally, there is no need to repost the same patch with just trailers added.
Sorry for no response, I plan to queue this at -rc1 as fix, so please give
me some time to officially apply at -rc1. I have put this a branch, so I won't
miss this but may need to rebase and hence silence.

-- 
Regards,
Sudeep