linux-kernel - Re: [PATCH v1 5/8] ACPI: x86: use acpi_dev_uid_match() for matching

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZTLKHULe1DlKs5BX@smile.fi.intel.com>
Date:   Fri, 20 Oct 2023 21:42:37 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Raag Jadav <raag.jadav@...el.com>, len.brown@...el.com,
        robert.moore@...el.com, mika.westerberg@...ux.intel.com,
        mark.rutland@....com, will@...nel.org, linux@...ck-us.net,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        acpica-devel@...ts.linuxfoundation.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-hwmon@...r.kernel.org,
        mallikarjunappa.sangannavar@...el.com, bala.senthil@...el.com
Subject: Re: [PATCH v1 5/8] ACPI: x86: use acpi_dev_uid_match() for matching
 _UID

On Fri, Oct 20, 2023 at 07:05:37PM +0200, Rafael J. Wysocki wrote:
> On Fri, Oct 20, 2023 at 12:38 PM Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > On Fri, Oct 20, 2023 at 02:17:29PM +0530, Raag Jadav wrote:

...

> > > -                     if (!adev->pnp.unique_id ||
> > > -                         strcmp(adev->pnp.unique_id, override_status_ids[i].uid))
> > > +                     if (!acpi_dev_uid_match(adev, override_status_ids[i].uid))
> >
> > The check for NULL argument inside that API does not affect the behaviour as
> > otherwise it will be a crash with the current implementation.
> 
> What current implementation do you mean, exactly?

strcmp() against NULL will crash the system.

-- 
With Best Regards,
Andy Shevchenko