Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

Pull irq fix from Ingo Molnar:
 "Fix a race in the IRQ resend mechanism, which can result in a NULL
  dereference crash"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Prevent NULL pointer dereference in resend_irqs()

diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 95414ad3506a919e21561d057e54ba27b8eb53c2..98c04ca5fa43d6a4515fff52a2d956c250777083 100644 (file)
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -36,6 +36,8 @@ static void resend_irqs(unsigned long arg)
                irq = find_first_bit(irqs_resend, nr_irqs);
                clear_bit(irq, irqs_resend);
                desc = irq_to_desc(irq);
+               if (!desc)
+                       continue;
                local_irq_disable();
                desc->handle_irq(desc);
                local_irq_enable();