From: Casey Schaufler <casey@schaufler-ca.com>
To: casey.schaufler@intel.com, paul@paul-moore.com,
linux-security-module@vger.kernel.org
Cc: john.johansen@canonical.com, selinux@vger.kernel.org,
jmorris@namei.org, linux-kernel@vger.kernel.org,
linux-audit@redhat.com
Subject: [PATCH v38 39/39] LSM: Create lsm_module_list system call
Date: Tue, 27 Sep 2022 13:31:55 -0700 [thread overview]
Message-ID: <20220927203155.15060-1-casey@schaufler-ca.com> (raw)
In-Reply-To: <20220927195421.14713-1-casey@schaufler-ca.com>
Create a system call to report the list of Linux Security Modules
that are active on the system. The list is provided as an array
of LSM ID numbers.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
arch/x86/entry/syscalls/syscall_64.tbl | 1 +
include/linux/syscalls.h | 1 +
include/uapi/asm-generic/unistd.h | 5 ++-
kernel/sys_ni.c | 1 +
security/lsm_syscalls.c | 50 ++++++++++++++++++++++++++
5 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 56d5c5202fd0..40b35e7069a7 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -373,6 +373,7 @@
449 common futex_waitv sys_futex_waitv
450 common set_mempolicy_home_node sys_set_mempolicy_home_node
451 common lsm_self_attr sys_lsm_self_attr
+452 common lsm_module_list sys_lsm_module_list
#
# Due to a historical design error, certain syscalls are numbered differently
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 7f87ef8be546..e2e2a9e93e8c 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1057,6 +1057,7 @@ asmlinkage long sys_set_mempolicy_home_node(unsigned long start, unsigned long l
unsigned long home_node,
unsigned long flags);
asmlinkage long sys_lsm_self_attr(struct lsm_ctx *ctx, size_t *size, int flags);
+asmlinkage long sys_lsm_module_list(unsigned int *ids, size_t *size, int flags);
/*
* Architecture-specific system calls
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index aa66718e1b48..090617a9a53a 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -889,8 +889,11 @@ __SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
#define __NR_lsm_self_attr 451
__SYSCALL(__NR_lsm_self_attr, sys_lsm_self_attr)
+#define __NR_lsm_module_list 452
+__SYSCALL(__NR_lsm_module_list, sys_lsm_module_list)
+
#undef __NR_syscalls
-#define __NR_syscalls 452
+#define __NR_syscalls 453
/*
* 32 bit systems traditionally used different
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 0fdb0341251d..bde9e74a3473 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -264,6 +264,7 @@ COND_SYSCALL(mremap);
/* security/lsm_syscalls.c */
COND_SYSCALL(lsm_self_attr);
+COND_SYSCALL(lsm_module_list);
/* security/keys/keyctl.c */
COND_SYSCALL(add_key);
diff --git a/security/lsm_syscalls.c b/security/lsm_syscalls.c
index da0fab7065e2..41d9ef945ede 100644
--- a/security/lsm_syscalls.c
+++ b/security/lsm_syscalls.c
@@ -154,3 +154,53 @@ SYSCALL_DEFINE3(lsm_self_attr,
kfree(final);
return rc;
}
+
+/**
+ * lsm_module_list - Return a list of the active security modules
+ * @ids: the LSM module ids
+ * @size: size of @ids, updated on return
+ * @flags: reserved for future use, must be zero
+ *
+ * Returns a list of the active LSM ids. On success this function
+ * returns the number of @ids array elements. This value may be zero
+ * if there are no LSMs active. If @size is insufficient to contain
+ * the return data -E2BIG is returned and @size is set to the minimum
+ * required size. In all other cases a negative value indicating the
+ * error is returned.
+ */
+SYSCALL_DEFINE3(lsm_module_list,
+ unsigned int __user *, ids,
+ size_t __user *, size,
+ int, flags)
+{
+ unsigned int *interum;
+ size_t total_size = lsm_id * sizeof(*interum);
+ size_t usize;
+ int rc;
+ int i;
+
+ if (get_user(usize, size))
+ return -EFAULT;
+
+ if (usize < total_size) {
+ if (put_user(total_size, size) != 0)
+ return -EFAULT;
+ return -E2BIG;
+ }
+
+ interum = kzalloc(total_size, GFP_KERNEL);
+ if (interum == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < lsm_id; i++)
+ interum[i] = lsm_idlist[i]->id;
+
+ if (copy_to_user(ids, interum, total_size) != 0 ||
+ put_user(total_size, size) != 0)
+ rc = -EFAULT;
+ else
+ rc = lsm_id;
+
+ kfree(interum);
+ return rc;
+}
--
2.37.3
--
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Linux-audit@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-audit
next prev parent reply other threads:[~2022-09-27 20:32 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220927195421.14713-1-casey.ref@schaufler-ca.com>
2022-09-27 19:53 ` [PATCH v38 00/39] LSM: Module stacking for AppArmor Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 01/39] LSM: Identify modules by more than name Casey Schaufler
2022-10-12 21:14 ` Mickaël Salaün
2023-03-03 15:17 ` Georgia Garcia
2023-03-03 16:52 ` Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 02/39] LSM: Add an LSM identifier for external use Casey Schaufler
2022-10-12 21:14 ` Mickaël Salaün
2022-10-20 22:47 ` Casey Schaufler
2023-03-03 17:14 ` Georgia Garcia
2022-09-27 19:53 ` [PATCH v38 03/39] LSM: Identify the process attributes for each module Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 04/39] LSM: Maintain a table of LSM attribute data Casey Schaufler
2022-10-13 10:04 ` Tetsuo Handa
2022-10-20 23:42 ` Casey Schaufler
2022-10-23 7:27 ` Tetsuo Handa
2022-10-23 10:10 ` Tetsuo Handa
2022-10-23 17:20 ` Casey Schaufler
2022-10-23 17:13 ` Casey Schaufler
2022-10-24 15:13 ` Tetsuo Handa
2022-10-24 16:37 ` Casey Schaufler
2022-10-25 9:59 ` Tetsuo Handa
2022-09-27 19:53 ` [PATCH v38 05/39] proc: Use lsmids instead of lsm names for attrs Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 06/39] LSM: lsm_self_attr syscall for LSM self attributes Casey Schaufler
2022-09-27 22:45 ` kernel test robot
2022-09-28 11:04 ` kernel test robot
2022-10-12 21:16 ` Mickaël Salaün
2022-10-20 15:44 ` Paul Moore
2022-10-20 16:13 ` Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 07/39] integrity: disassociate ima_filter_rule from security_audit_rule Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 08/39] LSM: Infrastructure management of the sock security Casey Schaufler
2022-10-12 21:17 ` Mickaël Salaün
2022-09-27 19:53 ` [PATCH v38 09/39] LSM: Add the lsmblob data structure Casey Schaufler
2022-10-12 21:18 ` Mickaël Salaün
2022-09-27 19:53 ` [PATCH v38 10/39] LSM: provide lsm name and id slot mappings Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 11/39] IMA: avoid label collisions with stacked LSMs Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 12/39] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 13/39] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 14/39] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 15/39] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 16/39] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler
2022-09-27 19:53 ` [PATCH v38 17/39] LSM: Use lsmblob in security_current_getsecid Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 18/39] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 19/39] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 20/39] LSM: Specify which LSM to display Casey Schaufler
2022-10-12 21:19 ` Mickaël Salaün
2022-09-27 19:54 ` [PATCH v38 21/39] LSM: Ensure the correct LSM context releaser Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 22/39] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 23/39] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 24/39] Use lsmcontext in security_dentry_init_security Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 25/39] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 26/39] NET: Store LSM netlabel data in a lsmblob Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 27/39] binder: Pass LSM identifier for confirmation Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 28/39] LSM: security_secid_to_secctx module selection Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 29/39] Audit: Keep multiple LSM data in audit_names Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 30/39] Audit: Create audit_stamp structure Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 31/39] LSM: Add a function to report multiple LSMs Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 32/39] Audit: Allow multiple records in an audit_buffer Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 33/39] Audit: Add record for multiple task security contexts Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 34/39] audit: multiple subject lsm values for netlabel Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 35/39] Audit: Add record for multiple object contexts Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 36/39] netlabel: Use a struct lsmblob in audit data Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 37/39] LSM: Removed scaffolding function lsmcontext_init Casey Schaufler
2022-09-27 19:54 ` [PATCH v38 38/39] AppArmor: Remove the exclusive flag Casey Schaufler
2022-09-27 20:31 ` Casey Schaufler [this message]
2022-09-28 14:27 ` [PATCH v38 39/39] LSM: Create lsm_module_list system call kernel test robot
2022-10-12 21:19 ` Mickaël Salaün
2022-10-20 20:28 ` Casey Schaufler
2022-10-12 22:04 ` Kees Cook
2022-10-25 0:39 ` Casey Schaufler
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