linux-kernel - Re: [PATCH] ACPICA: Fix dereference in acpi_ev_address_space

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Message-ID: <20241105171113.vifd2x2suoebpt3r@bogus>
Date: Tue, 5 Nov 2024 17:11:13 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: George Rurikov <grurikov@...il.com>
Cc: Robert Moore <robert.moore@...el.com>,
	Sudeep Holla <sudeep.holla@....com>,
	"Rafael J. Wysocki" <lenb@...nel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"acpica-devel@...ts.linux.dev" <acpica-devel@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH] ACPICA: Fix dereference in
 acpi_ev_address_space_dispatch()

On Thu, Oct 31, 2024 at 05:31:46PM +0000, George Rurikov wrote:
> * # Be careful, this email looks suspicious; * WARNING!  This email has multiple suspicious indicators that suggest it is malicious, please handle links and attachments with extreme care. *
> When support for  PCC Opregion was added, validation of field_obj
> was missed.
> Based on the acpi_ev_address_space_dispatch function description,
> field_obj can be NULL, and also when acpi_ev_address_space_dispatch
> is called in the acpi_ex_region_read() NULL is passed as field_obj.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>

LGTM, please submit this to ACPICA project as specified in the documentation
if not already done. Otherwise a reference to the merge request there would
be good here.

--
Regards,
Sudeep