linux-kernel - Re: [PATCH] irqchip/gic: Check interrupt type validity

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Message-ID: <95b86e30-f81e-2838-5225-789633cd34ba@gmail.com>
Date:   Fri, 15 Nov 2019 14:32:48 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: [PATCH] irqchip/gic: Check interrupt type validity

On 10/23/19 12:56 PM, Florian Fainelli wrote:
> In case the interrupt property specifies a type parameter that is not
> GIC_SPI (0) or GIC_PPIC (1), do not attempt to translate the interrupt
> and return -EINVAL instead.
> 
> Fixes: f833f57ff254 ("irqchip: Convert all alloc/xlate users from of_node to fwnode")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
> Marc,
> 
> Regardless of whether my attempt to use SGI moves any further, this
> seems appropriate to do since we should not be trying to translate
> incorrectly specified interrupts. Thanks!

Ping?

> 
>  drivers/irqchip/irq-gic.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
> index 30ab623343d3..fc47e655618d 100644
> --- a/drivers/irqchip/irq-gic.c
> +++ b/drivers/irqchip/irq-gic.c
> @@ -1005,6 +1005,9 @@ static int gic_irq_domain_translate(struct irq_domain *d,
>  		if (fwspec->param_count < 3)
>  			return -EINVAL;
>  
> +		if (fwspec->param[0] > 1)
> +			return -EINVAL;
> +
>  		/* Get the interrupt number and add 16 to skip over SGIs */
>  		*hwirq = fwspec->param[1] + 16;
>  
> 


-- 
Florian