[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20180716230309.23937-1-raghuhack78@gmail.com>
Date: Tue, 17 Jul 2018 04:33:09 +0530
From: RAGHU Halharvi <raghuhack78@...il.com>
To: linux-kernel@...r.kernel.org
Cc: RAGHU Halharvi <raghuhack78@...il.com>, tglx@...utronix.de
Subject: [PATCH] genirq:Dereference desc after null pointer check
* Remove unchecked dereferencing of *desc & assigning it local irq
variable
* Move the assignement after proper check of *desc for NULL pointer.
Signed-off-by: RAGHU Halharvi <raghuhack78@...il.com>
---
kernel/irq/manage.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index facfecfc543c..33c77eb4fdb6 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1557,15 +1557,16 @@ EXPORT_SYMBOL_GPL(setup_irq);
*/
static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id)
{
- unsigned irq = desc->irq_data.irq;
+ unsigned int irq;
struct irqaction *action, **action_ptr;
unsigned long flags;
- WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
if (!desc)
return NULL;
+ irq = desc->irq_data.irq;
+ WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
mutex_lock(&desc->request_mutex);
chip_bus_lock(desc);
raw_spin_lock_irqsave(&desc->lock, flags);
--
2.17.1
Powered by blists - more mailing lists