linux-kernel - [PATCH v2 10/18] nitro_enclaves: Add logic for enclave image load metadata

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200522062946.28973-11-andraprs@amazon.com>
Date:   Fri, 22 May 2020 09:29:38 +0300
From:   Andra Paraschiv <andraprs@...zon.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        "Bjoern Doebel" <doebel@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        "Frank van der Linden" <fllinden@...zon.com>,
        Alexander Graf <graf@...zon.de>,
        "Martin Pohlack" <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Balbir Singh <sblbir@...zon.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stewart Smith <trawets@...zon.com>,
        Uwe Dannowski <uwed@...zon.de>, <kvm@...r.kernel.org>,
        <ne-devel-upstream@...zon.com>,
        Andra Paraschiv <andraprs@...zon.com>
Subject: [PATCH v2 10/18] nitro_enclaves: Add logic for enclave image load metadata

Before setting the memory regions for the enclave, the enclave image
needs to be placed in memory. After the memory regions are set, this
memory cannot be used anymore by the VM, being carved out.

Add ioctl command logic to get the offset in enclave memory where to
place the enclave image. Then the user space tooling copies the enclave
image in the memory using the giveni memory offset.

Signed-off-by: Andra Paraschiv <andraprs@...zon.com>
---
 drivers/virt/nitro_enclaves/ne_misc_dev.c | 24 +++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev.c b/drivers/virt/nitro_enclaves/ne_misc_dev.c
index 8cf262ac1bbc..936c9ce19213 100644
--- a/drivers/virt/nitro_enclaves/ne_misc_dev.c
+++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c
@@ -295,6 +295,30 @@ static long ne_enclave_ioctl(struct file *file, unsigned int cmd,
 		return rc;
 	}
 
+	case NE_GET_IMAGE_LOAD_METADATA: {
+		struct image_load_metadata image_load_metadata = {};
+
+		if (copy_from_user(&image_load_metadata, (void *)arg,
+				   sizeof(image_load_metadata))) {
+			pr_err_ratelimited(NE "Error in copy from user\n");
+
+			return -EFAULT;
+		}
+
+		/* TODO: Check flags before setting the memory offset. */
+
+		image_load_metadata.memory_offset = NE_IMAGE_LOAD_OFFSET;
+
+		if (copy_to_user((void *)arg, &image_load_metadata,
+				 sizeof(image_load_metadata))) {
+			pr_err_ratelimited(NE "Error in copy to user\n");
+
+			return -EFAULT;
+		}
+
+		return 0;
+	}
+
 	default:
 		return -ENOTTY;
 	}
-- 
2.20.1 (Apple Git-117)




Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.