From: David Howells <dhowells@redhat.com>
To: Alison Schofield <alison.schofield@intel.com>
Cc: dhowells@redhat.com, tglx@linutronix.de,
Kai Huang <kai.huang@intel.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Kirill Shutemov <kirill.shutemov@intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Jarkko Sakkinen <jarkko.sakkinen@intel.com>,
jmorris@namei.org, keyrings@vger.kernel.org,
linux-security-module@vger.kernel.org, mingo@redhat.com,
hpa@zytor.com, x86@kernel.org, linux-mm@kvack.org
Subject: Re: [RFC 04/12] x86/mm: Add helper functions to manage memory encryption keys
Date: Tue, 11 Sep 2018 23:56:55 +0100 [thread overview]
Message-ID: <30751.1536706615@warthog.procyon.org.uk> (raw)
In-Reply-To: <28a55df5da1ecfea28bac588d3ac429cf1419b42.1536356108.git.alison.schofield@intel.com>
Alison Schofield <alison.schofield@intel.com> wrote:
> +void mktme_map_set_keyid(int keyid, unsigned int serial)
> +{
> + mktme_map->serial[keyid] = serial;
> + mktme_map->mapped_keyids++;
> +}
It appears that 'serial' should be key_serial_t.
Note that you *aren't* allowed to cache key serial numbers inside the kernel.
You must cache the struct key * instead and hold a reference to the key. This
will prevent the key from being destroyed whilst it is in use.
David
next prev parent reply other threads:[~2018-09-11 22:56 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-07 22:23 [RFC 00/12] Multi-Key Total Memory Encryption API (MKTME) Alison Schofield
2018-09-07 22:34 ` [RFC 01/12] docs/x86: Document the Multi-Key Total Memory Encryption API Alison Schofield
2018-09-08 18:44 ` Randy Dunlap
2018-09-10 1:28 ` Huang, Kai
2018-09-11 0:13 ` Alison Schofield
2018-09-11 0:33 ` Huang, Kai
2018-09-11 0:45 ` Alison Schofield
2018-09-11 1:14 ` Huang, Kai
2018-09-11 0:14 ` Huang, Kai
2018-09-10 17:32 ` Sakkinen, Jarkko
2018-09-11 0:19 ` Alison Schofield
2018-09-07 22:34 ` [RFC 02/12] mm: Generalize the mprotect implementation to support extensions Alison Schofield
2018-09-10 10:12 ` Jarkko Sakkinen
2018-09-11 0:34 ` Alison Schofield
2018-09-07 22:34 ` [RFC 03/12] syscall/x86: Wire up a new system call for memory encryption keys Alison Schofield
2018-09-07 22:36 ` [RFC 04/12] x86/mm: Add helper functions to manage " Alison Schofield
2018-09-10 2:56 ` Huang, Kai
2018-09-10 23:37 ` Huang, Kai
2018-09-10 23:41 ` Alison Schofield
2018-09-10 17:37 ` Sakkinen, Jarkko
2018-09-07 22:36 ` [RFC 05/12] x86/mm: Add a helper function to set keyid bits in encrypted VMA's Alison Schofield
2018-09-10 17:57 ` Sakkinen, Jarkko
2018-09-07 22:36 ` [RFC 06/12] mm: Add the encrypt_mprotect() system call Alison Schofield
2018-09-10 18:02 ` Jarkko Sakkinen
2018-09-11 2:15 ` Alison Schofield
2018-09-07 22:37 ` [RFC 07/12] x86/mm: Add helper functions to track encrypted VMA's Alison Schofield
2018-09-10 3:17 ` Huang, Kai
2018-09-07 22:37 ` [RFC 08/12] mm: Track VMA's in use for each memory encryption keyid Alison Schofield
2018-09-10 18:20 ` Jarkko Sakkinen
2018-09-11 2:39 ` Alison Schofield
2018-09-07 22:37 ` [RFC 09/12] mm: Restrict memory encryption to anonymous VMA's Alison Schofield
2018-09-10 18:21 ` Sakkinen, Jarkko
2018-09-10 18:57 ` Dave Hansen
2018-09-10 21:07 ` Jarkko Sakkinen
2018-09-10 21:09 ` Dave Hansen
2018-09-07 22:38 ` [RFC 10/12] x86/pconfig: Program memory encryption keys on a system-wide basis Alison Schofield
2018-09-10 1:46 ` Huang, Kai
2018-09-10 18:24 ` Sakkinen, Jarkko
2018-09-11 2:46 ` Alison Schofield
2018-09-11 14:31 ` Jarkko Sakkinen
2018-09-07 22:38 ` [RFC 11/12] keys/mktme: Add a new key service type for memory encryption keys Alison Schofield
2018-09-10 3:29 ` Huang, Kai
2018-09-10 21:47 ` Alison Schofield
2018-09-15 0:06 ` Alison Schofield
2018-09-17 10:48 ` Huang, Kai
2018-09-17 22:34 ` Huang, Kai
2018-09-07 22:39 ` [RFC 12/12] keys/mktme: Do not revoke in use " Alison Schofield
2018-09-10 1:10 ` [RFC 00/12] Multi-Key Total Memory Encryption API (MKTME) Huang, Kai
2018-09-10 19:10 ` Alison Schofield
2018-09-11 3:15 ` Huang, Kai
2018-09-10 17:29 ` Sakkinen, Jarkko
2018-09-11 22:03 ` [RFC 11/12] keys/mktme: Add a new key service type for memory encryption keys David Howells
2018-09-11 22:39 ` Alison Schofield
2018-09-11 23:01 ` David Howells
2018-09-11 22:56 ` David Howells [this message]
2018-09-12 11:12 ` [RFC 12/12] keys/mktme: Do not revoke in use " David Howells
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