linux-kernel - Re: [PATCH] kunit/overflow: Fix UB in overflow_allocation

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Message-Id: <172373928009.559695.8528767427266408069.b4-ty@kernel.org>
Date: Thu, 15 Aug 2024 09:28:02 -0700
From: Kees Cook <kees@...nel.org>
To: akpm@...ux-foundation.org,
	davidgow@...gle.com,
	Ivan Orlov <ivan.orlov0322@...il.com>
Cc: Kees Cook <kees@...nel.org>,
	kunit-dev@...glegroups.com,
	linux-kernel@...r.kernel.org,
	erhard_f@...lbox.org
Subject: Re: [PATCH] kunit/overflow: Fix UB in overflow_allocation_test

On Thu, 15 Aug 2024 01:04:31 +0100, Ivan Orlov wrote:
> The 'device_name' array doesn't exist out of the
> 'overflow_allocation_test' function scope. However, it is being used as
> a driver name when calling 'kunit_driver_create' from
> 'kunit_device_register'. It produces the kernel panic with KASAN
> enabled.
> 
> Since this variable is used in one place only, remove it and pass the
> device name into kunit_device_register directly as an ascii string.
> 
> [...]

Applied to for-linus/hardening, thanks!

[1/1] kunit/overflow: Fix UB in overflow_allocation_test
      https://git.kernel.org/kees/c/92e9bac18124

Take care,

-- 
Kees Cook