From: Stephen Smalley <sds@tycho.nsa.gov>
To: Casey Schaufler <casey@schaufler-ca.com>,
casey.schaufler@intel.com, jmorris@namei.org,
linux-security-module@vger.kernel.org, selinux@vger.kernel.org
Cc: keescook@chromium.org, john.johansen@canonical.com,
penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com
Subject: Re: [PATCH v13 14/25] LSM: Ensure the correct LSM context releaser
Date: Tue, 7 Jan 2020 14:16:17 -0500 [thread overview]
Message-ID: <cae85ebf-989a-2a2c-2402-d7ae48971545@tycho.nsa.gov> (raw)
In-Reply-To: <20191224235939.7483-15-casey@schaufler-ca.com>
On 12/24/19 6:59 PM, Casey Schaufler wrote:
> Add a new lsmcontext data structure to hold all the information
> about a "security context", including the string, its size and
> which LSM allocated the string. The allocation information is
> necessary because LSMs have different policies regarding the
> lifecycle of these strings. SELinux allocates and destroys
> them on each use, whereas Smack provides a pointer to an entry
> in a list that never goes away.
>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> Reviewed-by: John Johansen <john.johansen@canonical.com>
> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
> cc: linux-integrity@vger.kernel.org
> cc: netdev@vger.kernel.org
> ---
> drivers/android/binder.c | 10 ++++---
> fs/ceph/xattr.c | 6 ++++-
> fs/nfs/nfs4proc.c | 8 ++++--
> fs/nfsd/nfs4xdr.c | 7 +++--
> include/linux/security.h | 35 +++++++++++++++++++++++--
> include/net/scm.h | 5 +++-
> kernel/audit.c | 14 +++++++---
> kernel/auditsc.c | 12 ++++++---
> net/ipv4/ip_sockglue.c | 4 ++-
> net/netfilter/nf_conntrack_netlink.c | 4 ++-
> net/netfilter/nf_conntrack_standalone.c | 4 ++-
> net/netfilter/nfnetlink_queue.c | 13 ++++++---
> net/netlabel/netlabel_unlabeled.c | 19 +++++++++++---
> net/netlabel/netlabel_user.c | 4 ++-
> security/security.c | 11 ++++----
> 15 files changed, 121 insertions(+), 35 deletions(-)
>
> diff --git a/include/linux/security.h b/include/linux/security.h
> index d12b5e828b8d..c040c959b413 100644
> --- a/include/linux/security.h
> +++ b/include/linux/security.h
> @@ -128,6 +128,37 @@ enum lockdown_reason {
> LOCKDOWN_CONFIDENTIALITY_MAX,
> };
>
> +/*
> + * A "security context" is the text representation of
> + * the information used by LSMs.
> + * This structure contains the string, its length, and which LSM
> + * it is useful for.
> + */
> +struct lsmcontext {
> + char *context; /* Provided by the module */
> + u32 len;
> + int slot; /* Identifies the module */
> +};
> +
> +/**
> + * lsmcontext_init - initialize an lsmcontext structure.
> + * @cp: Pointer to the context to initialize
> + * @context: Initial context, or NULL
> + * @size: Size of context, or 0
> + * @slot: Which LSM provided the context
> + *
> + * Fill in the lsmcontext from the provided information.
> + * This is a scaffolding function that will be removed when
> + * lsmcontext integration is complete.
Still present after the entire series is applied, with one residual user
in ceph. Intentional or an oversight?
Otherwise,
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
> + */
> +static inline void lsmcontext_init(struct lsmcontext *cp, char *context,
> + u32 size, int slot)
> +{
> + cp->slot = slot;
> + cp->context = context;
> + cp->len = size;
> +}
> +
> /*
> * Data exported by the security modules
> *
next prev parent reply other threads:[~2020-01-07 19:15 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191224235939.7483-1-casey.ref@schaufler-ca.com>
2019-12-24 23:59 ` [PATCH v13 00/25] LSM: Module stacking for AppArmor Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 01/25] LSM: Infrastructure management of the sock security Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 02/25] LSM: Create and manage the lsmblob data structure Casey Schaufler
2019-12-25 20:34 ` Mickaël Salaün
2019-12-24 23:59 ` [PATCH v13 03/25] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler
2019-12-31 13:13 ` Mimi Zohar
2020-01-02 23:36 ` Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 04/25] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 05/25] net: Prepare UDS for security module stacking Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 06/25] Use lsmblob in security_secctx_to_secid Casey Schaufler
2020-01-07 17:45 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 07/25] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 08/25] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 09/25] LSM: Use lsmblob in security_task_getsecid Casey Schaufler
2020-01-07 17:53 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 10/25] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 11/25] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 12/25] IMA: Change internal interfaces to use lsmblobs Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 13/25] LSM: Specify which LSM to display Casey Schaufler
2020-01-07 19:02 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 14/25] LSM: Ensure the correct LSM context releaser Casey Schaufler
2020-01-07 19:16 ` Stephen Smalley [this message]
2019-12-24 23:59 ` [PATCH v13 15/25] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler
2020-01-06 16:15 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 16/25] LSM: Use lsmcontext in security_dentry_init_security Casey Schaufler
2020-01-07 19:23 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 17/25] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 18/25] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 19/25] NET: Store LSM netlabel data in a lsmblob Casey Schaufler
2020-01-07 19:25 ` Stephen Smalley
2020-01-07 21:58 ` Casey Schaufler
2020-01-09 14:34 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 20/25] LSM: Verify LSM display sanity in binder Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 21/25] Audit: Add subj_LSM fields when necessary Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 22/25] Audit: Include object data for all security modules Casey Schaufler
2019-12-24 23:59 ` [PATCH v13 23/25] NET: Add SO_PEERCONTEXT for multiple LSMs Casey Schaufler
2020-01-06 17:15 ` Stephen Smalley
2020-01-06 17:29 ` Simon McVittie
2020-01-06 18:03 ` Casey Schaufler
2020-01-06 18:45 ` Stephen Smalley
2020-01-06 18:43 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH 24/25] LSM: Add /proc attr entry for full LSM context Casey Schaufler
2020-01-06 16:22 ` Stephen Smalley
2019-12-24 23:59 ` [PATCH v13 25/25] AppArmor: Remove the exclusive flag Casey Schaufler
2020-01-03 18:53 ` [PATCH v13 26/25] Audit: Multiple LSM support in audit rules Casey Schaufler
2020-01-03 18:53 ` Casey Schaufler
2020-01-09 16:33 ` Mimi Zohar
2020-01-10 19:40 ` Casey Schaufler
2020-01-10 19:40 ` Casey Schaufler
2020-01-12 15:37 ` Mimi Zohar
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