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Commit c2b5a251 authored by Matthew Wilcox's avatar Matthew Wilcox Committed by Linus Torvalds
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[PATCH] Check the irq number is within bounds 



Most of the functions already check. Do the ones that didn't.

Signed-off-by: default avatarMatthew Wilcox <matthew@wil.cx>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 2d0ebb36

kernel/irq/manage.c

+15 −0
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ void synchronize_irq(unsigned int irq) 
{

	struct irq_desc *desc = irq_desc + irq;



	if (irq >= NR_IRQS)

		return;



	while (desc->status & IRQ_INPROGRESS)

		cpu_relax();

}
@@ -60,6 +63,9 @@ void disable_irq_nosync(unsigned int irq) 
	irq_desc_t *desc = irq_desc + irq;

	unsigned long flags;



	if (irq >= NR_IRQS)

		return;



	spin_lock_irqsave(&desc->lock, flags);

	if (!desc->depth++) {

		desc->status |= IRQ_DISABLED;
@@ -86,6 +92,9 @@ void disable_irq(unsigned int irq) 
{

	irq_desc_t *desc = irq_desc + irq;



	if (irq >= NR_IRQS)

		return;



	disable_irq_nosync(irq);

	if (desc->action)

		synchronize_irq(irq);
@@ -108,6 +117,9 @@ void enable_irq(unsigned int irq) 
	irq_desc_t *desc = irq_desc + irq;

	unsigned long flags;



	if (irq >= NR_IRQS)

		return;



	spin_lock_irqsave(&desc->lock, flags);

	switch (desc->depth) {

	case 0:
@@ -163,6 +175,9 @@ int setup_irq(unsigned int irq, struct irqaction * new) 
	unsigned long flags;

	int shared = 0;



	if (irq >= NR_IRQS)

		return -EINVAL;



	if (desc->handler == &no_irq_type)

		return -ENOSYS;

	/*