linux-hardening - [PATCH 06/10][next] scsi: aacraid: Use struct_size() helper in code related to struct sgmapraw

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Message-ID: <be2e5ecf1c4410ab419e2290341fbc8a0e2ba963.1687974498.git.gustavoars@kernel.org>
Date:   Wed, 28 Jun 2023 11:56:31 -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 06/10][next] scsi: aacraid: Use struct_size() helper in code
 related to struct sgmapraw

Prefer struct_size() over open-coded versions.

Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/scsi/aacraid/aachba.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index b3c0c2255e55..03ba974f6b2a 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -1266,8 +1266,7 @@ static int aac_read_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3
 		if (ret < 0)
 			return ret;
 		command = ContainerRawIo;
-		fibsize = sizeof(struct aac_raw_io) +
-			  le32_to_cpu(readcmd->sg.count) * sizeof(struct sgentryraw);
+		fibsize = struct_size(readcmd, sg.sg, le32_to_cpu(readcmd->sg.count));
 	}
 
 	BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr)));
@@ -1400,8 +1399,7 @@ static int aac_write_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u
 		if (ret < 0)
 			return ret;
 		command = ContainerRawIo;
-		fibsize = sizeof(struct aac_raw_io) +
-			  le32_to_cpu(writecmd->sg.count) * sizeof(struct sgentryraw);
+		fibsize = struct_size(writecmd, sg.sg, le32_to_cpu(writecmd->sg.count));
 	}
 
 	BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr)));
-- 
2.34.1