linux-kernel - Re: [PATCH v2] gpiolib: fix invalid pointer access in debugfs

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Message-ID: <aQi-Bs3Aw6T6ejt_@smile.fi.intel.com>
Date: Mon, 3 Nov 2025 16:36:54 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2] gpiolib: fix invalid pointer access in debugfs

On Mon, Nov 03, 2025 at 03:11:32PM +0100, Bartosz Golaszewski wrote:

> If the memory allocation in gpiolib_seq_start() fails, the s->private
> field remains uninitialized and is later dereferenced without checking
> in gpiolib_seq_stop(). Initialize s->private to NULL before calling
> kzalloc() and check it before dereferencing it.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

-- 
With Best Regards,
Andy Shevchenko