[SCSI] megaraid_sas: Add array boundary check for SystemPD

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 31d397497c45..ad6e2ac196b0 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1508,7 +1508,8 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
 
         /* Check if this is a system PD I/O */
-        if (instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
+        if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
+            instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
                 io_request->Function = 0;
                 io_request->DevHandle =
                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;