[PATCH 3/6][SRU][K] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_DRV_RAID_MAP

[AceLan Kao]

From: "Gustavo A. R. Silva" <gustavoars at kernel.org>

BugLink: https://launchpad.net/bugs/2008157

One-element arrays are deprecated, and we are replacing them with flexible
array members instead. So, replace one-element array with flexible-array
member in struct MR_DRV_RAID_MAP and refactor the code accordingly.

This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines
on memcpy().

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/109
Link: https://lore.kernel.org/r/1448f387821833726b99f0ce13069ada89164eb5.1660592640.git.gustavoars@kernel.org
Reviewed-by: Kees Cook <keescook at chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars at kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
Enhanced-by: Kees Cook <keescook at chromium.org> # Change in struct MR_DRV_RAID_MAP_ALL
(cherry picked from commit eeb3bab77244b8d91e4e9b611177cd1196900163)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h
index 66e13b74fcdc..df92d4369e04 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.h
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h
@@ -1182,7 +1182,7 @@ struct MR_DRV_RAID_MAP {
 		devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES_DYN];
 	u16 ldTgtIdToLd[MAX_LOGICAL_DRIVES_DYN];
 	struct MR_ARRAY_INFO arMapInfo[MAX_API_ARRAYS_DYN];
-	struct MR_LD_SPAN_MAP      ldSpanMap[1];
+	struct MR_LD_SPAN_MAP      ldSpanMap[];
 
 };
 
@@ -1193,7 +1193,7 @@ struct MR_DRV_RAID_MAP {
 struct MR_DRV_RAID_MAP_ALL {
 
 	struct MR_DRV_RAID_MAP raidMap;
-	struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES_DYN - 1];
+	struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES_DYN];
 } __packed;
 
 
-- 
2.34.1