linux-hardening - [PATCH 02/10][next] scsi: aacraid: Use struct_size() helper in aac_get_safw_ciss

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Message-ID: <cd80ea8f2446fe62ec15ffb0bbcecb69e0c342af.1687974498.git.gustavoars@kernel.org>
Date:   Wed, 28 Jun 2023 11:54:58 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     aacraid@...rosemi.com, "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kees Cook <keescook@...omium.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH 02/10][next] scsi: aacraid: Use struct_size() helper in
 aac_get_safw_ciss_luns()

Prefer struct_size() over open-coded versions.

This results in no differences in binary output.

Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/scsi/aacraid/aachba.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index bba2d4d952ca..fff0550e02e4 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -1832,8 +1832,7 @@ static int aac_get_safw_ciss_luns(struct aac_dev *dev)
 	struct aac_srb_unit srbu;
 	struct aac_ciss_phys_luns_resp *phys_luns;
 
-	datasize = sizeof(struct aac_ciss_phys_luns_resp) +
-		   AAC_MAX_TARGETS * sizeof(struct _ciss_lun);
+	datasize = struct_size(phys_luns, lun, AAC_MAX_TARGETS);
 	phys_luns = kmalloc(datasize, GFP_KERNEL);
 	if (phys_luns == NULL)
 		goto out;
-- 
2.34.1