linux-kernel - Re: [tip: irq/urgent] irqchip/gic-v3-its: Fix potential race condition in its_vlpi_prop

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Message-ID: <875xuq6lr9.ffs@tglx>
Date: Mon, 03 Jun 2024 18:20:42 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Marc Zyngier <maz@...nel.org>, linux-kernel@...r.kernel.org
Cc: linux-tip-commits@...r.kernel.org, Hagar Hemdan <hagarhem@...zon.com>,
 stable@...r.kernel.org, x86@...nel.org
Subject: Re: [tip: irq/urgent] irqchip/gic-v3-its: Fix potential race
 condition in its_vlpi_prop_update()

On Mon, Jun 03 2024 at 17:01, Marc Zyngier wrote:
> On Mon, 03 Jun 2024 13:25:06 +0100,
>> @@ -1992,6 +1970,8 @@ static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
>>  	if (!is_v4(its_dev->its))
>>  		return -EINVAL;
>>  
>> +	guard(raw_spinlock_irq, &its_dev->event_map.vlpi_lock);
>> +
>
> I don't think this compiles as is, due to the funky syntax required.

Stupid me. I obviously compiled the wrong config to validate...

Fixed now.