linux-kernel - Re: [PATCH] regulator: s5m8767: Bounds check id indexing into arrays

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Message-Id: <167493884134.2529563.8166230650067316693.b4-ty@kernel.org>
Date:   Sat, 28 Jan 2023 20:47:21 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Kees Cook <keescook@...omium.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] regulator: s5m8767: Bounds check id indexing into
 arrays

On Fri, 27 Jan 2023 16:53:58 -0800, Kees Cook wrote:
> The compiler has no way to know if "id" is within the array bounds of
> the regulators array. Add a check for this and a build-time check that
> the regulators and reg_voltage_map arrays are sized the same. Seen with
> GCC 13:
> 
> ../drivers/regulator/s5m8767.c: In function 's5m8767_pmic_probe':
> ../drivers/regulator/s5m8767.c:936:35: warning: array subscript [0, 36] is outside array bounds of 'struct regulator_desc[37]' [-Warray-bounds=]
>   936 |                         regulators[id].vsel_reg =
>       |                         ~~~~~~~~~~^~~~
> 
> [...]

Applied to

   broonie/regulator.git for-next

Thanks!

[1/1] regulator: s5m8767: Bounds check id indexing into arrays
      commit: e314e15a0b58f9d051c00b25951073bcdae61953

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark