linux-kernel - [PATCH] irq/generic-chip: Fix memory leak of domain->name

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Date:   Wed, 27 Sep 2017 20:28:16 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jeffy Chen <jeffy.chen@...k-chips.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] irq/generic-chip: Fix memory leak of domain->name

Free domain->name when IRQ_DOMAIN_NAME_ALLOCATED been set.

Fixes: d59f6617eef0 ("genirq: Allow fwnode to carry name information only")
Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

 kernel/irq/generic-chip.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index f7086b78ad6e..174dae8ee7fe 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -322,6 +322,10 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 		/* Calc pointer to the next generic chip */
 		tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
 	}
+	if (d->flags & IRQ_DOMAIN_NAME_ALLOCATED) {
+		kfree(d->name);
+		d->flags &= ~IRQ_DOMAIN_NAME_ALLOCATED;
+	}
 	d->name = name;
 	return 0;
 }
-- 
2.11.0