linux-hardening - Re: [PATCH v2] iio: sx9324: avoid copying property strings

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Message-ID: <CAFhGd8p76R-oaPWR0G6wESe7kgM--2bzU88j2vz4QGy8wKNffg@mail.gmail.com>
Date: Mon, 11 Dec 2023 16:46:20 -0800
From: Justin Stitt <justinstitt@...gle.com>
To: Stephen Boyd <swboyd@...omium.org>
Cc: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>, linux-iio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, 
	Gwendal Grignou <gwendal@...omium.org>
Subject: Re: [PATCH v2] iio: sx9324: avoid copying property strings

Hi,

On Mon, Oct 30, 2023 at 2:44 PM Stephen Boyd <swboyd@...omium.org> wrote:
>
>
> We need to free it in other places too, like if the count doesn't match.
> It may be easier to extract this section and just have 4 string
> literals.
>
>         switch (reg_def->reg) {
>         case SX9324_REG_AFE_PH0:
>                 reg_def = sx9324_parse_phase_prop(dev, reg_def, "semtech,ph0-pin");
>                 break;
>         case SX9324_REG_AFE_PH1:
>                 reg_def = sx9324_parse_phase_prop(dev, reg_def, "semtech,ph1-pin");
>                 break;
>         case SX9324_REG_AFE_PH2:
>                 reg_def = sx9324_parse_phase_prop(dev, reg_def, "semtech,ph2-pin");
>                 break;
>         case SX9324_REG_AFE_PH3:
>                 reg_def = sx9324_parse_phase_prop(dev, reg_def, "semtech,ph3-pin");
>                 break;
>

I've submitted v3 of this patch [1] trying out Stephen's idea. I'd
appreciate feedback.

[1]: https://lore.kernel.org/all/20231212-strncpy-drivers-iio-proximity-sx9324-c-v3-1-b8ae12fc8a5d@google.com/

Thanks
Justin