mpt3sas: Ensure the connector_name string is NUL-terminated
We blindly trust the hardware to give us NUL-terminated strings, which
is a bad idea because it doesn't always do that. For example:
[ 481.184784] mpt3sas_cm0: enclosure level(0x0000), connector name( \x3)
In this case, connector_name is four spaces. We got lucky here because
the 2nd byte beyond our character array happens to be a NUL. Fix this by
explicitly writing '\0' to the end of the string to ensure we don't run
off the edge of the world in printk().
Signed-off-by: Calvin Owens <calvinowens@fb.com>
Acked-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index cd91a68..acabe48 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -5380,8 +5380,9 @@
MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
sas_device->enclosure_level =
le16_to_cpu(sas_device_pg0.EnclosureLevel);
- memcpy(&sas_device->connector_name[0],
- &sas_device_pg0.ConnectorName[0], 4);
+ memcpy(sas_device->connector_name,
+ sas_device_pg0.ConnectorName, 4);
+ sas_device->connector_name[4] = '\0';
} else {
sas_device->enclosure_level = 0;
sas_device->connector_name[0] = '\0';
@@ -5508,8 +5509,9 @@
if (sas_device_pg0.Flags & MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
sas_device->enclosure_level =
le16_to_cpu(sas_device_pg0.EnclosureLevel);
- memcpy(&sas_device->connector_name[0],
- &sas_device_pg0.ConnectorName[0], 4);
+ memcpy(sas_device->connector_name,
+ sas_device_pg0.ConnectorName, 4);
+ sas_device->connector_name[4] = '\0';
} else {
sas_device->enclosure_level = 0;
sas_device->connector_name[0] = '\0';