4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shivasharan S <shivasharan.srikanteshw...@broadcom.com>

commit 91b3d9f0069c8307d0b3a4c6843b65a439183318 upstream.

Signed-off-by: Kashyap Desai <kashyap.de...@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshw...@broadcom.com>
Reviewed-by: Hannes Reinecke <h...@suse.com>
Reviewed-by: Tomas Henzl <the...@redhat.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/scsi/megaraid/megaraid_sas_base.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5650,6 +5650,14 @@ megasas_register_aen(struct megasas_inst
                prev_aen.word =
                        le32_to_cpu(instance->aen_cmd->frame->dcmd.mbox.w[1]);
 
+               if ((curr_aen.members.class < MFI_EVT_CLASS_DEBUG) ||
+                   (curr_aen.members.class > MFI_EVT_CLASS_DEAD)) {
+                       dev_info(&instance->pdev->dev,
+                                "%s %d out of range class %d send by 
application\n",
+                                __func__, __LINE__, curr_aen.members.class);
+                       return 0;
+               }
+
                /*
                 * A class whose enum value is smaller is inclusive of all
                 * higher values. If a PROGRESS (= -1) was previously


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