scsi: qla4xxx: Replace all non-returning strlcpy() with strscpy()

strlcpy() reads the entire source buffer first. This read may exceed the
destination size limit. This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1]. In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Kees Cook <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/qla4xxx/ql4_mbx.c

···
 		goto exit_get_chap;
 	}
 
-	strlcpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
-	strlcpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
+	strscpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
+	strscpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
 	chap_table->cookie = cpu_to_le16(CHAP_VALID_COOKIE);
 
 exit_get_chap:
···
 		goto exit_unlock_uni_chap;
 	}
 
-	strlcpy(password, chap_table->secret, MAX_CHAP_SECRET_LEN);
-	strlcpy(username, chap_table->name, MAX_CHAP_NAME_LEN);
+	strscpy(password, chap_table->secret, MAX_CHAP_SECRET_LEN);
+	strscpy(username, chap_table->name, MAX_CHAP_NAME_LEN);
 
 	rval = QLA_SUCCESS;
 

drivers/scsi/qla4xxx/ql4_os.c

···
 			continue;
 
 		chap_rec->chap_tbl_idx = i;
-		strlcpy(chap_rec->username, chap_table->name,
+		strscpy(chap_rec->username, chap_table->name,
 			ISCSI_CHAP_AUTH_NAME_MAX_LEN);
-		strlcpy(chap_rec->password, chap_table->secret,
+		strscpy(chap_rec->password, chap_table->secret,
 			QL4_CHAP_MAX_SECRET_LEN);
 		chap_rec->password_length = chap_table->secret_len;
 
···
 		if (!(chap_table->flags & BIT_6)) /* Not BIDI */
 			continue;
 
-		strlcpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
-		strlcpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
+		strscpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
+		strscpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
 		ret = 0;
 		break;
 	}
···
 
 	tddb->tpgt = sess->tpgt;
 	tddb->port = conn->persistent_port;
-	strlcpy(tddb->iscsi_name, sess->targetname, ISCSI_NAME_SIZE);
-	strlcpy(tddb->ip_addr, conn->persistent_address, DDB_IPADDR_LEN);
+	strscpy(tddb->iscsi_name, sess->targetname, ISCSI_NAME_SIZE);
+	strscpy(tddb->ip_addr, conn->persistent_address, DDB_IPADDR_LEN);
 }
 
 static void qla4xxx_convert_param_ddb(struct dev_db_entry *fw_ddb_entry,
···
 		goto exit_ddb_logout;
 	}
 
-	strlcpy(flash_tddb->iscsi_name, fnode_sess->targetname,
+	strscpy(flash_tddb->iscsi_name, fnode_sess->targetname,
 		ISCSI_NAME_SIZE);
 
 	if (!strncmp(fnode_sess->portal_type, PORTAL_TYPE_IPV6, 4))