4.13-stable review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Gleixner <[email protected]> commit 9cb067ef8a10bb13112e4d1c0ea996ec96527422 upstream. The result of cpumask_any_and() is invalid when result greater or equal nr_cpu_ids. The current check is checking for greater only. Fix it. Fixes: 761ea388e8c4 ("genirq: Handle managed irqs gracefully in irq_startup()") Signed-off-by: Thomas Gleixner <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Juergen Gross <[email protected]> Cc: Tony Luck <[email protected]> Cc: Chen Yu <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Alok Kataria <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Rui Zhang <[email protected]> Cc: "K. Y. Srinivasan" <[email protected]> Cc: Arjan van de Ven <[email protected]> Cc: Dan Williams <[email protected]> Cc: Len Brown <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]> --- kernel/irq/chip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -202,7 +202,7 @@ __irq_startup_managed(struct irq_desc *d irqd_clr_managed_shutdown(d); - if (cpumask_any_and(aff, cpu_online_mask) > nr_cpu_ids) { + if (cpumask_any_and(aff, cpu_online_mask) >= nr_cpu_ids) { /* * Catch code which fiddles with enable_irq() on a managed * and potentially shutdown IRQ. Chained interrupt
