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Commit 8fbbe2d7 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Thomas Gleixner
Browse files

genirq/ipi: Fixup checks against nr_cpu_ids 



Valid CPU ids are [0, nr_cpu_ids-1] inclusive.

Fixes: 3b8e29a8 ("genirq: Implement ipi_send_mask/single()")
Fixes: f9bce791 ("genirq: Add a new function to get IPI reverse mapping")
Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2
parent e8f24189

kernel/irq/ipi.c

+2 −2
Original line number Diff line number Diff line
@@ -165,7 +165,7 @@ irq_hw_number_t ipi_get_hwirq(unsigned int irq, unsigned int cpu) 
	struct irq_data *data = irq_get_irq_data(irq);

	struct cpumask *ipimask = data ? irq_data_get_affinity_mask(data) : NULL;



	if (!data || !ipimask || cpu > nr_cpu_ids)

	if (!data || !ipimask || cpu >= nr_cpu_ids)

		return INVALID_HWIRQ;



	if (!cpumask_test_cpu(cpu, ipimask))
@@ -195,7 +195,7 @@ static int ipi_send_verify(struct irq_chip *chip, struct irq_data *data, 
	if (!chip->ipi_send_single && !chip->ipi_send_mask)

		return -EINVAL;



	if (cpu > nr_cpu_ids)

	if (cpu >= nr_cpu_ids)

		return -EINVAL;



	if (dest) {