Currently the lpfc driver sizes its cpu_map array based on num_possible_cpus(). However, that can be a value that is less than the highest cpu id bit that is set. As such, if a thread runs on a cpu with a larger cpu id, or for_each_possible_cpu() is used, the driver could index off the end of the array and return garbage or GPF. The driver maintains it's own internal copy of the "num_possible" cpu value and sizes arrays by it. Fix by setting the driver's value to the value of the last cpu id bit set in the possible_mask - plus 1. Thus cpu_map will be sized to allow access by any cpu id possible. Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx> Signed-off-by: James Smart <jsmart2021@xxxxxxxxx> --- drivers/scsi/lpfc/lpfc_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index e9323889f199..cd83617354a1 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -6460,7 +6460,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba) u32 if_fam; phba->sli4_hba.num_present_cpu = lpfc_present_cpu; - phba->sli4_hba.num_possible_cpu = num_possible_cpus(); + phba->sli4_hba.num_possible_cpu = cpumask_last(cpu_possible_mask) + 1; phba->sli4_hba.curr_disp_cpu = 0; lpfc_cpumask_of_node_init(phba); -- 2.13.7
