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scsi: megaraid_sas: Use struct_size() in code related to struct MR_FW_RAID_MAP

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Prefer struct_size() over open-coded versions of idiom:

	sizeof(struct-with-flex-array) + sizeof(type-of-flex-array) * count

where count is the max number of items the flexible array is supposed to
have.

Link: https://github.com/KSPP/linux/issues/160
Link: https://lore.kernel.org/r/1211398fb8f7ab332a93f4f8f1a63e8168dbd002.1660592640.git.gustavoars@kernel.org
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Gustavo A. R. Silva 2022-08-15 16:51:36 -05:00 committed by Martin K. Petersen
parent ee92366a84
commit 41e830269d
2 changed files with 6 additions and 6 deletions
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6
drivers/scsi/megaraid/megaraid_sas_base.c
View file

@ -5155,9 +5155,9 @@ static void megasas_update_ext_vd_details(struct megasas_instance *instance)
fusion->current_map_sz = ventura_map_sz;
fusion->max_map_sz = ventura_map_sz;
} else {
fusion->old_map_sz = sizeof(struct MR_FW_RAID_MAP) +
(sizeof(struct MR_LD_SPAN_MAP) *
instance->fw_supported_vd_count);
fusion->old_map_sz =
struct_size((struct MR_FW_RAID_MAP *)0, ldSpanMap,
instance->fw_supported_vd_count);
fusion->new_map_sz = sizeof(struct MR_FW_RAID_MAP_EXT);
fusion->max_map_sz =

6
drivers/scsi/megaraid/megaraid_sas_fp.c
View file

@ -326,9 +326,9 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id)
else if (instance->supportmax256vd)
expected_size = sizeof(struct MR_FW_RAID_MAP_EXT);
else
expected_size =
(sizeof(struct MR_FW_RAID_MAP) +
(sizeof(struct MR_LD_SPAN_MAP) * le16_to_cpu(pDrvRaidMap->ldCount)));
expected_size = struct_size((struct MR_FW_RAID_MAP *)0,
ldSpanMap,
le16_to_cpu(pDrvRaidMap->ldCount));
if (le32_to_cpu(pDrvRaidMap->totalSize) != expected_size) {
dev_dbg(&instance->pdev->dev, "megasas: map info structure size 0x%x",