linux-kernel - Re: [PATCH] mfd: menelaus: fix possible race condition and leak

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Date:   Tue, 11 Sep 2018 16:39:54 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH] mfd: menelaus: fix possible race condition and leak

On Sun, 09 Sep 2018, Alexandre Belloni wrote:

> The IRQ work is added before the struct rtc is allocated and registered,
> but this struct is used in the IRQ handler. This may lead to a NULL pointer
> dereference.
> 
> Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
> before calling menelaus_add_irq_work.
> 
> Also, this solves a possible leak as the RTC is never released.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
> 
> Lee,
> 
> If that is ok with you, I would like to take this patch through the RTC
> tree. So I can have a follow up patch removing rtc_device_register().
> 
> Thanks
> 
>  drivers/mfd/menelaus.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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