From: Alexey Dobriyan <adobriyan@gmail.com>
To: tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] genirq: fixup checks against nr_cpu_ids
Date: Sat, 19 Aug 2017 12:57:51 +0300
Message-ID: <20170819095751.GB27864@avx2> (raw)
Valid CPU ids are [0, nr_cpu_ids-1] inclusive.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
kernel/irq/ipi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/irq/ipi.c
+++ b/kernel/irq/ipi.c
@@ -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) {
next reply index
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-19 9:57 Alexey Dobriyan [this message]
2017-08-20 8:56 ` [tip:irq/urgent] genirq/ipi: Fixup " tip-bot for Alexey Dobriyan
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