From: Casey Schaufler <casey@schaufler-ca.com> To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: casey@schaufler-ca.com, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, sds@tycho.nsa.gov Subject: [PATCH v8 25/28] LSM: Provide an user space interface for the default display Date: Thu, 29 Aug 2019 16:29:32 -0700 Message-ID: <20190829232935.7099-26-casey@schaufler-ca.com> (raw) In-Reply-To: <20190829232935.7099-1-casey@schaufler-ca.com> Create /sys/kernel/security/lsm_display_default which contains the name of the security module used when no display value has been set. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- security/inode.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/security/inode.c b/security/inode.c index b7772a9b315e..538a4d6796da 100644 --- a/security/inode.c +++ b/security/inode.c @@ -321,6 +321,22 @@ static const struct file_operations lsm_ops = { .read = lsm_read, .llseek = generic_file_llseek, }; + +static struct dentry *lsm_display_default_dentry; +static ssize_t lsm_display_default_read(struct file *filp, char __user *buf, + size_t count, loff_t *ppos) +{ + const char *name = security_lsm_slot_name(0); + + if (name == NULL) + return 0; + return simple_read_from_buffer(buf, count, ppos, name, strlen(name)); +} + +static const struct file_operations lsm_display_default_ops = { + .read = lsm_display_default_read, + .llseek = generic_file_llseek, +}; #endif static int __init securityfs_init(void) @@ -337,8 +353,10 @@ static int __init securityfs_init(void) return retval; } #ifdef CONFIG_SECURITY - lsm_dentry = securityfs_create_file("lsm", 0444, NULL, NULL, - &lsm_ops); + lsm_dentry = securityfs_create_file("lsm", 0444, NULL, NULL, &lsm_ops); + lsm_display_default_dentry = securityfs_create_file( + "lsm_display_default", 0444, NULL, + NULL, &lsm_display_default_ops); #endif return 0; } -- 2.20.1
next prev parent reply index Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-29 23:29 [PATCH v8 00/28] LSM: Module stacking for AppArmor Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 01/28] LSM: Infrastructure management of the superblock Casey Schaufler 2019-09-16 18:19 ` Stephen Smalley 2019-08-29 23:29 ` [PATCH v8 02/28] LSM: Infrastructure management of the sock security Casey Schaufler 2019-09-16 18:42 ` Stephen Smalley 2019-09-18 7:19 ` John Johansen 2019-08-29 23:29 ` [PATCH v8 03/28] LSM: Infrastructure management of the key blob Casey Schaufler 2019-09-16 18:47 ` Stephen Smalley 2019-08-29 23:29 ` [PATCH v8 04/28] LSM: Create and manage the lsmblob data structure Casey Schaufler 2019-09-16 19:15 ` Stephen Smalley 2019-09-23 15:56 ` Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 05/28] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 06/28] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 07/28] net: Prepare UDS for security module stacking Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 08/28] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 09/28] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 10/28] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 11/28] LSM: Use lsmblob in security_task_getsecid Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 12/28] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 13/28] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 14/28] IMA: Change internal interfaces to use lsmblobs Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 15/28] LSM: Specify which LSM to display Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 16/28] LSM: Ensure the correct LSM context releaser Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 17/28] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 18/28] LSM: Use lsmcontext in security_dentry_init_security Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 19/28] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 20/28] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 21/28] NET: Store LSM netlabel data in a lsmblob Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 22/28] SELinux: Verify LSM display sanity in binder Casey Schaufler 2019-09-18 17:43 ` Stephen Smalley 2019-08-29 23:29 ` [PATCH v8 23/28] Audit: Add subj_LSM fields when necessary Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 24/28] Audit: Include object data for all security modules Casey Schaufler 2019-08-29 23:29 ` Casey Schaufler [this message] 2019-08-29 23:29 ` [PATCH v8 26/28] NET: Add SO_PEERCONTEXT for multiple LSMs Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 27/28] LSM: Add /proc attr entry for full LSM context Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 28/28] AppArmor: Remove the exclusive flag Casey Schaufler 2019-09-04 19:13 ` [PATCH v8 00/28] LSM: Module stacking for AppArmor Casey Schaufler 2019-09-06 13:46 ` Stephen Smalley
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