From: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Date: Wed, 23 Aug 2017 04:47:01 -0700
Subject: [PATCH] scsi: megaraid_sas: Check valid aen class range to avoid
kernel panic
References: bsc#1049528,FATE#322937
Git-commit: 91b3d9f0069c8307d0b3a4c6843b65a439183318
Patch-Mainline: v4.14-rc1
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Cc: stable@vger.kernel.org
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index b00d063..3d74f8c 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5667,6 +5667,14 @@ static void megasas_release_mfi(struct megasas_instance *instance)
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
--
1.8.5.6