linux-kernel - Re: selftests: gpio: crash on arm64

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: <CA+G9fYvReHr+ofJAW4yfA5EWT6-MRpR2+fOQG24hROjSd+dY0g@mail.gmail.com>
Date:   Tue, 7 Nov 2023 19:21:32 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
        Arnd Bergmann <arnd@...db.de>, Shuah Khan <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pengfei Xu <pengfei.xu@...el.com>, yi1.lai@...el.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: selftests: gpio: crash on arm64

Hi Linus and Bartosz,

On Tue, 20 Jun 2023 at 22:11, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Tue, Apr 11, 2023 at 10:57:28AM +0200, Linus Walleij wrote:
> > On Mon, Apr 10, 2023 at 11:16 AM Naresh Kamboju
> > <naresh.kamboju@...aro.org> wrote:
>
> ...
>
> > Add a pr_info() devm_gpio_chip_release() in drivers/gpio/gpiolib-devres.c
> > and see if the callback is even called. I think this could be the
> > problem: if that isn't cleaned up, there will be dangling references.
>
> Side note: Since we have devres tracepoints, your patch seems an overkill :-)
> Just enable devres tracepoints and filter out by the function name. I believe
> that should work.

Since I have been tracking open issues on the stable-rc kernel,
The reported problem on stable-rc linux.6.3.y has been solved
on the stable-rc linux.6.6.y branch.

Thanks for fixing this reported issue.

Upstream links about this fix and discussion,

Commit daecca4b8433
gpiolib: Do not alter GPIO chip fwnode member

[1] https://lore.kernel.org/linux-gpio/20230703142308.5772-4-andriy.shevchenko@linux.intel.com/
[2] https://lore.kernel.org/linux-gpio/CAMRc=MfFEBSeJ78NO7XeuzAMJ0KezEPAYWsWnFXXaRyQPAf3dA@mail.gmail.com/
[3] https://lore.kernel.org/linux-gpio/CA+G9fYv94gx8+-JMzbmQaue3q3y6QdBmsGUCdD-26X5XavL3Ag@mail.gmail.com/

>
> --
> With Best Regards,
> Andy Shevchenko
>
>