From: Dan Carpenter <dan.carpenter@oracle.com>
To: Marc Zyngier <marc.zyngier@arm.com>,
David Daney <david.daney@cavium.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] irqdomain: check for NULL before dereferencing
Date: Fri, 25 Aug 2017 10:13:37 +0300 [thread overview]
Message-ID: <20170825071337.g72afdd5pdqjshon@mwanda> (raw)
I reversed these two checks so we check "root_irq_data" for NULL before
dereferencing it.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index b9c688944429..e84b7056bb08 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1505,10 +1505,10 @@ int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
if (WARN_ON(!irq_domain_is_hierarchy(domain)))
return -EINVAL;
- if (domain->parent != root_irq_data->domain)
+ if (!root_irq_data)
return -EINVAL;
- if (!root_irq_data)
+ if (domain->parent != root_irq_data->domain)
return -EINVAL;
child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
next reply other threads:[~2017-08-25 7:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-25 7:13 Dan Carpenter [this message]
2017-08-25 8:45 ` Thomas Gleixner
2017-08-25 9:10 ` [PATCH v2] irqdomain: potential Oops in irq_domain_push_irq() Dan Carpenter
2017-08-25 11:08 ` Thomas Gleixner
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