From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: "James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org
Subject: [PATCH][next] scsi: core: Use struct_size() helper in kmalloc()
Date: Tue, 25 Jan 2022 17:10:33 -0600 [thread overview]
Message-ID: <20220125231033.GA79247@embeddedor> (raw)
Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.
Also, address the following sparse warnings:
drivers/scsi/scsi.c:390:27: warning: using sizeof on a flexible structure
Link: https://github.com/KSPP/linux/issues/174
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/scsi/scsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 211aace69c22..949cb530e360 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -387,7 +387,7 @@ static struct scsi_vpd *scsi_get_vpd_buf(struct scsi_device *sdev, u8 page)
int vpd_len = SCSI_VPD_PG_LEN, result;
retry_pg:
- vpd_buf = kmalloc(sizeof(*vpd_buf) + vpd_len, GFP_KERNEL);
+ vpd_buf = kmalloc(struct_size(vpd_buf, data, vpd_len), GFP_KERNEL);
if (!vpd_buf)
return NULL;
--
2.27.0
reply other threads:[~2022-01-25 23:04 UTC|newest]
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