linux-hardening - [PATCH 2/4][next] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_FW_RAID_MAP

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Message-ID: <600564eef022b547c561407c17ba88dd0f5df7e0.1628135423.git.gustavoars@kernel.org>
Date:   Wed, 4 Aug 2021 22:59:58 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Kashyap Desai <kashyap.desai@...adcom.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Shivasharan S <shivasharan.srikanteshwara@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        megaraidlinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-hardening@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: [PATCH 2/4][next] scsi: megaraid_sas: Replace one-element array with
 flexible-array member in MR_FW_RAID_MAP_DYNAMIC

Replace one-element array with a flexible-array member in struct
MR_FW_RAID_MAP_DYNAMIC.

This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/109
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h
index b32a6ad7d5a8..8b08445f575e 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.h
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h
@@ -1053,7 +1053,7 @@ struct MR_FW_RAID_MAP_DYNAMIC {
 	struct MR_RAID_MAP_DESC_TABLE
 			raid_map_desc_table[RAID_MAP_DESC_TYPE_COUNT];
 	/* Variable Size buffer containing all data */
-	u32 raid_map_desc_data[1];
+	u32 raid_map_desc_data[];
 }; /* Dynamicaly sized RAID MAp structure */
 
 #define IEEE_SGE_FLAGS_ADDR_MASK            (0x03)
-- 
2.27.0