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 27/28] LSM: Add /proc attr entry for full LSM context Date: Thu, 29 Aug 2019 16:29:34 -0700 Message-ID: <20190829232935.7099-28-casey@schaufler-ca.com> (raw) In-Reply-To: <20190829232935.7099-1-casey@schaufler-ca.com> Add an entry /proc/.../attr/context which displays the full process security "context" in compound format:' lsm1\0value\0lsm2\0value\0... This entry is not writable. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- fs/proc/base.c | 1 + security/security.c | 27 +++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/fs/proc/base.c b/fs/proc/base.c index 7bf70e041315..79600df5f7a2 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2619,6 +2619,7 @@ static const struct pid_entry attr_dir_stuff[] = { ATTR(NULL, "keycreate", 0666), ATTR(NULL, "sockcreate", 0666), ATTR(NULL, "display", 0666), + ATTR(NULL, "context", 0666), #ifdef CONFIG_SECURITY_SMACK DIR("smack", 0555, proc_smack_attr_dir_inode_ops, proc_smack_attr_dir_ops), diff --git a/security/security.c b/security/security.c index 8cb91f33c166..d151ac4a398b 100644 --- a/security/security.c +++ b/security/security.c @@ -2082,6 +2082,10 @@ int security_getprocattr(struct task_struct *p, const char *lsm, char *name, char **value) { struct security_hook_list *hp; + char *final = NULL; + char *cp; + int rc = 0; + int finallen = 0; int display = lsm_task_display(current); int slot = 0; @@ -2099,6 +2103,29 @@ int security_getprocattr(struct task_struct *p, const char *lsm, char *name, return -ENOMEM; } + if (!strcmp(name, "context")) { + hlist_for_each_entry(hp, &security_hook_heads.getprocattr, + list) { + rc = hp->hook.getprocattr(p, "current", &cp); + if (rc == -EINVAL || rc == -ENOPROTOOPT) + continue; + if (rc < 0) { + kfree(final); + return rc; + } + rc = append_ctx(&final, &finallen, hp->lsmid->lsm, + cp, rc); + if (rc < 0) { + kfree(final); + return rc; + } + } + if (final == NULL) + return -EINVAL; + *value = final; + return finallen; + } + hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) { if (lsm != NULL && strcmp(lsm, hp->lsmid->lsm)) continue; -- 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 ` [PATCH v8 25/28] LSM: Provide an user space interface for the default display Casey Schaufler 2019-08-29 23:29 ` [PATCH v8 26/28] NET: Add SO_PEERCONTEXT for multiple LSMs Casey Schaufler 2019-08-29 23:29 ` Casey Schaufler [this message] 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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