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[4/5] scsi: mpi3mr: Avoid possible run-time warning with long manufacturer strings

Message ID 20240410023155.2100422-4-keescook@chromium.org (mailing list archive)
State Changes Requested
Headers show
Series scsi: Avoid possible run-time warning with long manufacturer strings | expand

Commit Message

Kees Cook April 10, 2024, 2:31 a.m. UTC
The prior use of strscpy() here expected the manufacture_reply strings to
be NUL-terminated, but it is possible they are not, as the code pattern
here shows, e.g., edev->vendor_id being exactly 1 character larger than
manufacture_reply->vendor_id, and the strscpy() was copying only up to
the size of the source character array. Replace this with memtostr(),
which is the unambiguous way to convert a maybe not-NUL-terminated
character array into a NUL-terminated string.

Fixes: 2bd37e284914 ("scsi: mpi3mr: Add framework to issue MPT transport cmds")
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: mpi3mr-linuxdrv.pdl@broadcom.com
Cc: linux-scsi@vger.kernel.org
 drivers/scsi/mpi3mr/mpi3mr_transport.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)
diff mbox series


diff --git a/drivers/scsi/mpi3mr/mpi3mr_transport.c b/drivers/scsi/mpi3mr/mpi3mr_transport.c
index dabb91f0f75d..3caceddb864a 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_transport.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_transport.c
@@ -211,17 +211,13 @@  static int mpi3mr_report_manufacture(struct mpi3mr_ioc *mrioc,
 		goto out;
-	strscpy(edev->vendor_id, manufacture_reply->vendor_id,
-	strscpy(edev->product_id, manufacture_reply->product_id,
-	strscpy(edev->product_rev, manufacture_reply->product_rev,
+	memtostr(edev->vendor_id, manufacture_reply->vendor_id);
+	memtostr(edev->product_id, manufacture_reply->product_id);
+	memtostr(edev->product_rev, manufacture_reply->product_rev);
 	edev->level = manufacture_reply->sas_format & 1;
 	if (edev->level) {
-		strscpy(edev->component_vendor_id,
-		    manufacture_reply->component_vendor_id,
+		memtostr(edev->component_vendor_id,
+			 manufacture_reply->component_vendor_id);
 		tmp = (u8 *)&manufacture_reply->component_id;
 		edev->component_id = tmp[0] << 8 | tmp[1];
 		edev->component_revision_id =