linux-kernel - Re: [PATCH] checkpatch: add uninitialized pointer with _

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Message-ID: <CAMB6jUGhcJ=W3s96jRBHHTyPfBm+-+d6-VQQ3mXft7=fBJ0jvg@mail.gmail.com>
Date: Thu, 23 Oct 2025 16:11:55 +0530
From: ally heev <allyheev@...il.com>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: Dwaipayan Ray <dwaipayanray1@...il.com>, Lukas Bulwahn <lukas.bulwahn@...il.com>, 
	Joe Perches <joe@...ches.com>, Jonathan Corbet <corbet@....net>, Andy Whitcroft <apw@...onical.com>, 
	workflows@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, David Hunter <david.hunter.linux@...il.com>, 
	Shuah Khan <skhan@...uxfoundation.org>, linux-pm@...r.kernel.org, 
	Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>
Subject: Re: [PATCH] checkpatch: add uninitialized pointer with __free
 attribute check

On Wed, Oct 22, 2025 at 12:55 PM Dan Carpenter <dan.carpenter@...aro.org> wrote:
>
> I made a list of the warnings this generates (on Monday's linux-next).
>
> None of the warnings are real bugs.  Every single one of these has the
> assignment as the first statement after the declaration block.  We have
> had bugs because of this before but Smatch and (I think) Clang detect
> them so they don't last for long.
>
> regards,
> dan carpenter
>
> arch/powerpc/platforms/82xx/km82xx.c:30:
> crypto/asymmetric_keys/x509_cert_parser.c:63:
> crypto/asymmetric_keys/x509_public_key.c:151:
> drivers/firmware/arm_scmi/shmem.c:199:
> drivers/net/ethernet/intel/ice/ice_flow.c:1576:
> drivers/net/ethernet/intel/idpf/idpf_virtchnl.c:1015:
> drivers/net/ethernet/microsoft/mana/gdma_main.c:1508:
> drivers/net/wireless/intel/iwlwifi/fw/uefi.c:821:
> drivers/net/wireless/intel/iwlwifi/mld/d3.c:1788:
> drivers/opp/core.c:1413:
> drivers/opp/core.c:1480:
> drivers/opp/core.c:1797:
> drivers/opp/core.c:1888:
> drivers/opp/core.c:2874:
> drivers/opp/core.c:2935:
> drivers/opp/core.c:2989:
> drivers/opp/core.c:3065:
> drivers/opp/core.c:3085:
> drivers/opp/core.c:3104:
> drivers/opp/core.c:312:
> drivers/opp/core.c:330:
> drivers/opp/core.c:412:
> drivers/opp/core.c:450:
> drivers/opp/core.c:608:
> drivers/opp/cpu.c:157:
> drivers/opp/cpu.c:204:
> drivers/opp/cpu.c:59:
> drivers/opp/of.c:1272:
> drivers/opp/of.c:1331:
> drivers/opp/of.c:1428:
> drivers/opp/of.c:1469:
> drivers/opp/of.c:149:
> drivers/opp/of.c:1505:
> drivers/opp/of.c:174:
> drivers/opp/of.c:276:
> drivers/opp/of.c:352:
> drivers/opp/of.c:409:
> drivers/opp/of.c:48:
> drivers/opp/of.c:98:
> drivers/scsi/scsi_debug.c:2964:
> drivers/tee/qcomtee/call.c:648:
> fs/overlayfs/params.c:451:

Thanks for reporting these. I will try to get to these in later
patches. But, how do we test the changes?
KTODO: run checkpatch with uninitialized pointer with __free attribute
check and fix the errors