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Message-Id: <20240401105015.27614-5-greg@enjellic.com>
Date: Mon, 1 Apr 2024 05:50:07 -0500
From: Greg Wettstein <greg@...ellic.com>
To: linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: jmorris@...ei.org
Subject: [PATCH v3 04/12] Add primary TSEM implementation file.
From: "Dr. Greg" <greg@...ellic.com>
The tsem.c file is the 'master' file in the TSEM implementation.
It is responsible for initializing the LSM and providing
the implementation of the security event handlers.
---
security/tsem/tsem.c | 2422 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 2422 insertions(+)
create mode 100644 security/tsem/tsem.c
diff --git a/security/tsem/tsem.c b/security/tsem/tsem.c
new file mode 100644
index 000000000000..876ef1fa8012
--- /dev/null
+++ b/security/tsem/tsem.c
@@ -0,0 +1,2422 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Copyright (C) 2024 Enjellic Systems Development, LLC
+ * Author: Dr. Greg Wettstein <greg@...ellic.com>
+ *
+ * This file is the primary implementation file for the tsem LSM.
+ *
+ * It implements initialization and setup functions that interpret
+ * kernel command-line arguments and prepares TSEM for operation.
+ *
+ * In addition it contains all of the TSEM specific security event
+ * handlers that are responsible for handling the LSM events that TSEM
+ * models.
+ *
+ * Each TSEM event handler calls the tsem_allocate_event() function to
+ * allocate a structure that will be used to describe the event. The
+ * CELL union of this structure contains various structures that are
+ * used to hold these parameters.
+ *
+ * Since the event characterization parameters need to be retained for
+ * the lifetime of the tsem_event structure that is allocated. In the
+ * case of internally modeled namespaces this lifespan is the lifetime
+ * of the security modeling namespace. In the case of externally
+ * modeled namespaces, the lifespan is until the security event
+ * description is exported to an external trust orchestrator.
+ *
+ * In order to support this model, the event description structures
+ * are typically composed of a union over 'in' and 'out' structures.
+ * The 'in' structures are used to hold arguments to the event handler
+ * that may only be relevant for the duration of the call. These
+ * values are translated into members of the 'out' structure that
+ * retain the values until the end of the lifetime of the tsem_event
+ * structure.
+ *
+ * Each TSEM event handler is responsible for allocating a tsem_event
+ * structure and populating the appropriate CELL structure with the
+ * input characteristics of the event. The dispatch_event() function
+ * is called to handle the modeling of the event. This function
+ * returns the permission value that is returned as the result of the
+ * LSM event handler.
+ *
+ * The dispatch_event() calls the tsem_event_init() function that is
+ * responsible for translating the input parameters into values that
+ * will be retained for the lifetime of the security event
+ * description. The populated event description is then dispatched to
+ * either the tsem_model_event() or the tsem_export_event() for
+ * modeling by either the internal TMA or by a TMA associated with an
+ * external trust orchestrator.
+ */
+
+#define LOCKED true
+#define NOLOCK false
+
+#include <linux/magic.h>
+#include <linux/mman.h>
+#include <linux/binfmts.h>
+#include <linux/bpf.h>
+#include <linux/mount.h>
+#include <linux/security.h>
+
+#include "tsem.h"
+
+static const struct lsm_id tsem_lsmid = {
+ .name = "tsem",
+ .id = LSM_ID_TSEM,
+};
+
+struct lsm_blob_sizes tsem_blob_sizes __ro_after_init = {
+ .lbs_task = sizeof(struct tsem_task),
+ .lbs_inode = sizeof(struct tsem_inode),
+ .lbs_ipc = sizeof(struct tsem_ipc),
+ .lbs_xattr_count = 1
+};
+
+enum tsem_action_type tsem_root_actions[TSEM_EVENT_CNT] = {
+ TSEM_ACTION_EPERM /* Undefined. */
+};
+
+static atomic64_t task_instance;
+
+static struct tsem_model root_model = {
+ .point_lock = __SPIN_LOCK_INITIALIZER(root_model.point_lock),
+ .point_list = LIST_HEAD_INIT(root_model.point_list),
+ .point_end_mutex = __MUTEX_INITIALIZER(root_model.point_end_mutex),
+
+ .trajectory_lock = __SPIN_LOCK_INITIALIZER(root_model.trajectory_lock),
+ .trajectory_list = LIST_HEAD_INIT(root_model.trajectory_list),
+ .trajectory_end_mutex = __MUTEX_INITIALIZER(root_model.trajectory_end_mutex),
+
+ .forensics_lock = __SPIN_LOCK_INITIALIZER(root_model.forensics_lock),
+ .forensics_list = LIST_HEAD_INIT(root_model.forensics_list),
+ .forensics_end_mutex = __MUTEX_INITIALIZER(root_model.forensics_end_mutex),
+
+ .pseudonym_mutex = __MUTEX_INITIALIZER(root_model.pseudonym_mutex),
+ .pseudonym_list = LIST_HEAD_INIT(root_model.pseudonym_list),
+
+ .mount_mutex = __MUTEX_INITIALIZER(root_model.mount_mutex),
+ .mount_list = LIST_HEAD_INIT(root_model.mount_list)
+};
+
+static struct tsem_context root_context;
+
+DEFINE_STATIC_KEY_TRUE(tsem_not_ready);
+
+static bool tsem_available __ro_after_init;
+
+static unsigned int magazine_size __ro_after_init = TSEM_ROOT_MAGAZINE_SIZE;
+
+static enum mode_type {
+ FULL_MODELING,
+ NO_ROOT_MODELING,
+ EXPORT_ONLY
+} tsem_mode __ro_after_init;
+
+static char *default_hash_function __ro_after_init;
+
+const char * const tsem_names[TSEM_EVENT_CNT] = {
+ "undefined",
+ "bprm_committed_creds",
+ "task_kill",
+ "task_setpgid",
+ "task_getpgid",
+ "task_getsid",
+ "task_setnice",
+ "task_setioprio",
+ "task_getioprio",
+ "task_prlimit",
+ "task_setrlimit",
+ "task_setscheduler",
+ "task_getscheduler",
+ "task_prctl",
+ "file_open",
+ "mmap_file",
+ "file_ioctl",
+ "file_lock",
+ "file_fcntl",
+ "file_receive",
+ "unix_stream_connect",
+ "unix_may_send",
+ "socket_create",
+ "socket_connect",
+ "socket_bind",
+ "socket_accept",
+ "socket_listen",
+ "socket_socketpair",
+ "socket_sendmsg",
+ "socket_recvmsg",
+ "socket_getsockname",
+ "socket_getpeername",
+ "socket_setsockopt",
+ "socket_shutdown",
+ "ptrace_traceme",
+ "kernel_module_request",
+ "kernel_load_data",
+ "kernel_read_file",
+ "sb_mount",
+ "sb_umount",
+ "sb_remount",
+ "sb_pivotroot",
+ "sb_statfs",
+ "move_mount",
+ "shm_associate",
+ "shm_shmctl",
+ "shm_shmat",
+ "sem_associate",
+ "sem_semctl",
+ "sem_semop",
+ "syslog",
+ "settime",
+ "quotactl",
+ "quota_on",
+ "msg_queue_associate",
+ "msg_queue_msgctl",
+ "msg_queue_msgsnd",
+ "msg_queue_msgrcv",
+ "ipc_permission",
+ "key_alloc",
+ "key_permission",
+ "netlink_send",
+ "inode_create",
+ "inode_link",
+ "inode_unlink",
+ "inode_symlink",
+ "inode_mkdir",
+ "inode_rmdir",
+ "inode_mknod",
+ "inode_rename",
+ "inode_setattr",
+ "inode_getattr",
+ "inode_setxattr",
+ "inode_getxattr",
+ "inode_listxattr",
+ "inode_removexattr",
+ "inode_killpriv",
+ "tun_dev_create",
+ "tun_dev_attach_queue",
+ "tun_dev_attach",
+ "tun_dev_open",
+ "bpf",
+ "bpf_map",
+ "bpf_prog",
+ "ptrace_access_check",
+ "capable",
+ "capget",
+ "capset"
+};
+
+static const unsigned long pseudo_filesystems[] = {
+ PROC_SUPER_MAGIC,
+ SYSFS_MAGIC,
+ DEBUGFS_MAGIC,
+ TMPFS_MAGIC,
+ DEVPTS_SUPER_MAGIC,
+ BINFMTFS_MAGIC,
+ SECURITYFS_MAGIC,
+ SELINUX_MAGIC,
+ SMACK_MAGIC,
+ CGROUP_SUPER_MAGIC,
+ CGROUP2_SUPER_MAGIC,
+ NSFS_MAGIC,
+ EFIVARFS_MAGIC
+};
+
+static int __init set_magazine_size(char *magazine_value)
+{
+ if (kstrtouint(magazine_value, 0, &magazine_size))
+ pr_warn("tsem: Failed to parse root cache size.\n");
+
+ if (!magazine_size) {
+ pr_warn("tsem: Forcing non-zero cache size.\n");
+ magazine_size = TSEM_ROOT_MAGAZINE_SIZE;
+ }
+
+ pr_info("tsem: Setting default root cache size to %u.\n",
+ magazine_size);
+ return 1;
+}
+__setup("tsem_cache=", set_magazine_size);
+
+static int __init set_modeling_mode(char *mode_value)
+{
+ unsigned long mode = 0;
+
+ if (kstrtoul(mode_value, 0, &mode)) {
+ pr_warn("tsem: Failed to parse modeling mode.\n");
+ return 1;
+ }
+
+ if (mode == 1)
+ tsem_mode = NO_ROOT_MODELING;
+ else if (mode == 2)
+ tsem_mode = EXPORT_ONLY;
+ else
+ pr_warn("tsem: Unknown mode specified.\n");
+ return 1;
+}
+__setup("tsem_mode=", set_modeling_mode);
+
+static int __init set_default_hash_function(char *hash_function)
+{
+
+ default_hash_function = hash_function;
+ return 1;
+}
+__setup("tsem_digest=", set_default_hash_function);
+
+static bool bypass_event(void)
+{
+ if (tsem_mode == NO_ROOT_MODELING && !tsem_context(current)->id)
+ return true;
+ return false;
+}
+
+static bool pseudo_filesystem(struct inode *inode)
+{
+ unsigned int lp;
+
+ for (lp = 0; lp < ARRAY_SIZE(pseudo_filesystems); ++lp)
+ if (inode->i_sb->s_magic == pseudo_filesystems[lp])
+ return true;
+ return false;
+}
+
+static int untrusted_task(struct tsem_event *ep)
+{
+ int retn = 0;
+ struct tsem_context *ctx = tsem_context(current);
+
+ if (ctx->external) {
+ retn = tsem_export_action(ep->event, ep->locked);
+ if (retn)
+ return retn;
+ } else
+ pr_warn("Untrusted event %s: model_ns=%lld, comm=%s, pid=%d\n",
+ tsem_names[ep->event], ctx->id, current->comm,
+ task_pid_nr(current));
+
+ if (ctx->actions[ep->event] == TSEM_ACTION_EPERM)
+ retn = -EPERM;
+ return retn;
+}
+
+static int dispatch_event(struct tsem_event *ep)
+{
+ int retn = 0;
+ struct tsem_context *ctx = tsem_context(current);
+
+ retn = tsem_event_init(ep);
+ if (retn)
+ return retn;
+
+ if (unlikely(tsem_task_untrusted(current)))
+ return untrusted_task(ep);
+
+ if (!ctx->external)
+ retn = tsem_model_event(ep);
+ else
+ retn = tsem_export_event(ep);
+
+ tsem_event_put(ep);
+ return retn;
+}
+
+static int tsem_file_open(struct file *file)
+{
+ struct inode *inode = file_inode(file);
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+ if (unlikely(tsem_inode(inode)->status == TSEM_INODE_CONTROL_PLANE)) {
+ if (capable(CAP_MAC_ADMIN))
+ return 0;
+ else
+ return -EPERM;
+ }
+
+ if (!S_ISREG(inode->i_mode))
+ return 0;
+ if (tsem_inode(inode)->status == TSEM_INODE_COLLECTING)
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_FILE_OPEN, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.file.in.file = file;
+ ep->CELL.file.in.pseudo_file = pseudo_filesystem(inode);
+
+ return dispatch_event(ep);
+}
+
+static int tsem_mmap_file(struct file *file, unsigned long prot,
+ unsigned long flags, unsigned long extra)
+{
+ struct inode *inode = NULL;
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ if (!file && !(prot & PROT_EXEC))
+ return 0;
+ if (file) {
+ inode = file_inode(file);
+ if (!S_ISREG(inode->i_mode))
+ return 0;
+ if (pseudo_filesystem(inode))
+ return 0;
+ }
+
+ ep = tsem_event_allocate(TSEM_MMAP_FILE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.mmap_file.anonymous = file == NULL ? 1 : 0;
+ ep->CELL.mmap_file.file.in.file = file;
+ ep->CELL.mmap_file.prot = prot;
+ ep->CELL.mmap_file.flags = flags;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_FILE_IOCTL, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.file.cmd = cmd;
+ ep->CELL.file.in.file = file;
+ ep->CELL.file.in.pseudo_file = pseudo_filesystem(file_inode(file));
+
+ return dispatch_event(ep);
+}
+
+static int tsem_file_lock(struct file *file, unsigned int cmd)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_FILE_LOCK, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.file.cmd = cmd;
+ ep->CELL.file.in.file = file;
+ ep->CELL.file.in.pseudo_file = pseudo_filesystem(file_inode(file));
+
+ return dispatch_event(ep);
+}
+
+static int tsem_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_FILE_FCNTL, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.file.cmd = cmd;
+ ep->CELL.file.in.file = file;
+ ep->CELL.file.in.pseudo_file = pseudo_filesystem(file_inode(file));
+
+ return dispatch_event(ep);
+}
+
+static int tsem_file_receive(struct file *file)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_FILE_RECEIVE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.file.in.file = file;
+ ep->CELL.file.in.pseudo_file = pseudo_filesystem(file_inode(file));
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_alloc(struct task_struct *new, unsigned long flags)
+{
+ struct tsem_task *old_task = tsem_task(current);
+ struct tsem_task *new_task = tsem_task(new);
+
+ new_task->instance = old_task->instance;
+ new_task->p_instance = old_task->instance;
+
+ new_task->trust_status = old_task->trust_status;
+ new_task->context = old_task->context;
+ memcpy(new_task->task_id, old_task->task_id, HASH_MAX_DIGESTSIZE);
+ memcpy(new_task->p_task_id, old_task->task_id, HASH_MAX_DIGESTSIZE);
+
+ if (!new_task->context->id)
+ return 0;
+
+ kref_get(&new_task->context->kref);
+ memcpy(new_task->task_key, old_task->task_key, HASH_MAX_DIGESTSIZE);
+ return 0;
+}
+
+static void tsem_task_free(struct task_struct *task)
+{
+ struct tsem_context *ctx = tsem_context(task);
+
+ if (!ctx->id)
+ return;
+ tsem_ns_put(ctx);
+}
+
+static int tsem_task_kill(struct task_struct *target,
+ struct kernel_siginfo *info, int sig,
+ const struct cred *cred)
+{
+ bool cross_model;
+ struct tsem_event *ep;
+ struct tsem_context *src_ctx = tsem_context(current);
+ struct tsem_context *tgt_ctx = tsem_context(target);
+
+ if (bypass_event())
+ return 0;
+
+ cross_model = src_ctx->id != tgt_ctx->id;
+
+ if (info != SEND_SIG_NOINFO && SI_FROMKERNEL(info))
+ return 0;
+ if (sig == SIGURG)
+ return 0;
+ if (!capable(CAP_MAC_ADMIN) &&
+ has_capability_noaudit(target, CAP_MAC_ADMIN))
+ return -EPERM;
+ if (!capable(CAP_MAC_ADMIN) && cross_model)
+ return -EPERM;
+
+ ep = tsem_event_allocate(TSEM_TASK_KILL, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_kill.signal = sig;
+ ep->CELL.task_kill.cross_model = cross_model;
+ memcpy(ep->CELL.task_kill.target, tsem_task(target)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_ptrace_access_check(struct task_struct *child,
+ unsigned int mode)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_PTRACE_ACCESS_CHECK, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_kill.u.resource = mode;
+ memcpy(ep->CELL.task_kill.target, tsem_task(child)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_ptrace_traceme(struct task_struct *parent)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_PTRACE_TRACEME, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.source, tsem_task(parent)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_capget(const struct task_struct *target,
+ kernel_cap_t *effective, kernel_cap_t *inheritable,
+ kernel_cap_t *permitted)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_CAPGET, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.capability.effective = *effective;
+ ep->CELL.capability.inheritable = *inheritable;
+ ep->CELL.capability.permitted = *permitted;
+ memcpy(ep->CELL.capability.target, tsem_task(target)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_capset(struct cred *new, const struct cred *old,
+ const kernel_cap_t *effective,
+ const kernel_cap_t *inheritable,
+ const kernel_cap_t *permitted)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_CAPSET, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.capability.effective = *effective;
+ ep->CELL.capability.inheritable = *inheritable;
+ ep->CELL.capability.permitted = *permitted;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_capable(const struct cred *cred, struct user_namespace *ns,
+ int cap, unsigned int opts)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_CAPABLE, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.capability.cap = cap;
+ ep->CELL.capability.opts = opts;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_setpgid(struct task_struct *p, pid_t pgid)
+{
+ struct tsem_event *ep;
+ struct task_struct *src;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_SETPGID, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ if (!pgid)
+ memcpy(ep->CELL.task_kill.source, tsem_task(p)->task_id,
+ tsem_digestsize());
+ else {
+ rcu_read_lock();
+ src = find_task_by_vpid(pgid);
+ rcu_read_unlock();
+ if (src)
+ memcpy(ep->CELL.task_kill.source,
+ tsem_task(src)->task_id, tsem_digestsize());
+ }
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_getpgid(struct task_struct *p)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_GETPGID, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_getsid(struct task_struct *p)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_GETSID, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_setnice(struct task_struct *p, int nice)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_SETNICE, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_kill.u.value = nice;
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_setioprio(struct task_struct *p, int ioprio)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_SETIOPRIO, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_kill.u.value = ioprio;
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_getioprio(struct task_struct *p)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_GETIOPRIO, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_prlimit(const struct cred *cred, const struct cred *tcred,
+ unsigned int flags)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_PRLIMIT, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_prlimit.flags = flags;
+ ep->CELL.task_prlimit.in.cred = cred;
+ ep->CELL.task_prlimit.in.tcred = tcred;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_setrlimit(struct task_struct *p, unsigned int resource,
+ struct rlimit *new_rlim)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_SETRLIMIT, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_kill.u.resource = resource;
+ ep->CELL.task_kill.cur = new_rlim->rlim_cur;
+ ep->CELL.task_kill.max = new_rlim->rlim_max;
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_setscheduler(struct task_struct *p)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_SETSCHEDULER, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_getscheduler(struct task_struct *p)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_GETSCHEDULER, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ memcpy(ep->CELL.task_kill.target, tsem_task(p)->task_id,
+ tsem_digestsize());
+
+ return dispatch_event(ep);
+}
+
+static int tsem_task_prctl(int option, unsigned long arg2, unsigned long arg3,
+ unsigned long arg4, unsigned long arg5)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TASK_PRCTL, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.task_prctl.option = option;
+ ep->CELL.task_prctl.arg2 = arg2;
+ ep->CELL.task_prctl.arg3 = arg3;
+ ep->CELL.task_prctl.arg4 = arg4;
+ ep->CELL.task_prctl.arg5 = arg5;
+
+ return dispatch_event(ep);
+}
+
+static void tsem_bprm_committed_creds(const struct linux_binprm *bprm)
+{
+ u8 task_id[HASH_MAX_DIGESTSIZE];
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return;
+
+ if (tsem_map_task(bprm->file, task_id))
+ memset(task_id, 0xff, sizeof(task_id));
+
+ tsem_task(current)->instance = atomic64_inc_return(&task_instance);
+ memcpy(tsem_task(current)->task_id, task_id, tsem_digestsize());
+}
+
+static int tsem_inode_alloc_security(struct inode *inode)
+{
+ struct tsem_inode *tsip = tsem_inode(inode);
+
+ mutex_init(&tsip->digest_mutex);
+ INIT_LIST_HEAD(&tsip->digest_list);
+
+ mutex_init(&tsip->create_mutex);
+ INIT_LIST_HEAD(&tsip->create_list);
+
+ mutex_init(&tsip->instance_mutex);
+ INIT_LIST_HEAD(&tsip->instance_list);
+
+ return 0;
+}
+
+static int tsem_inode_init_security(struct inode *inode, struct inode *dir,
+ const struct qstr *qstr,
+ struct xattr *xattrs, int *xattr_count)
+{
+ u8 *owner = tsem_task(current)->task_id;
+ struct tsem_inode *tsip = tsem_inode(inode);
+ struct tsem_inode_instance *entry, *retn = NULL;
+
+ mutex_lock(&tsem_inode(dir)->create_mutex);
+ list_for_each_entry(entry, &tsem_inode(dir)->create_list, list) {
+ if (!memcmp(entry->owner, owner, tsem_digestsize()) &&
+ !strcmp(qstr->name, entry->pathname)) {
+ retn = entry;
+ break;
+ }
+ }
+
+ if (retn) {
+ tsip->created = true;
+ tsip->creator = retn->creator;
+ tsip->instance = retn->instance;
+ memcpy(tsip->owner, retn->owner, tsem_digestsize());
+ list_del(&retn->list);
+ }
+ mutex_unlock(&tsem_inode(dir)->create_mutex);
+
+ if (!retn && S_ISREG(inode->i_mode))
+ WARN_ONCE(true, "Cannot find inode ownership information.");
+
+ return -EOPNOTSUPP;
+}
+
+static void _release_inode_instances(u64 id, struct tsem_inode *tsip)
+{
+ struct tsem_inode_instance *owner, *tmp_owner;
+
+ mutex_lock(&tsip->instance_mutex);
+ list_for_each_entry_safe(owner, tmp_owner, &tsip->instance_list,
+ list) {
+ if (id == owner->creator) {
+ list_del(&owner->list);
+ kfree(owner);
+ }
+ }
+ mutex_unlock(&tsip->instance_mutex);
+}
+
+static void tsem_inode_free_security(struct inode *inode)
+{
+ struct tsem_inode_instance *owner, *tmp_owner;
+ struct tsem_inode_digest *digest, *tmp_digest;
+ struct tsem_inode_entry *entry, *tmp_entry;
+ struct tsem_context *ctx = tsem_context(current);
+
+ mutex_lock(&ctx->inode_mutex);
+ list_for_each_entry_safe(entry, tmp_entry, &ctx->inode_list, list) {
+ if (entry->tsip == tsem_inode(inode)) {
+ list_del(&entry->list);
+ _release_inode_instances(ctx->id, entry->tsip);
+ kfree(entry);
+ }
+ }
+ mutex_unlock(&ctx->inode_mutex);
+
+ list_for_each_entry_safe(digest, tmp_digest,
+ &tsem_inode(inode)->digest_list, list) {
+ list_del(&digest->list);
+ kfree(digest->name);
+ kfree(digest);
+ }
+
+ list_for_each_entry_safe(owner, tmp_owner,
+ &tsem_inode(inode)->create_list, list) {
+ list_del(&owner->list);
+ kfree(owner);
+ }
+
+ list_for_each_entry_safe(owner, tmp_owner,
+ &tsem_inode(inode)->instance_list, list) {
+ list_del(&owner->list);
+ kfree(owner);
+ }
+}
+
+static int tsem_unix_stream_connect(struct sock *sock, struct sock *other,
+ struct sock *newsk)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_UNIX_STREAM_CONNECT, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sock;
+ ep->CELL.socket.in.sockb = other;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_unix_may_send(struct socket *sock, struct socket *other)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_UNIX_MAY_SEND, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sock->sk;
+ ep->CELL.socket.in.sockb = other->sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_post_create(struct socket *sock, int family, int type,
+ int protocol, int kern)
+{
+ struct tsem_inode *tsip = tsem_inode(SOCK_INODE(sock));
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+
+ memcpy(tsip->owner, tsem_task(current)->task_id, tsem_digestsize());
+ return 0;
+}
+
+static int tsem_socket_create(int family, int type, int protocol, int kern)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_CREATE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.out.socka.family = family;
+ ep->CELL.socket.out.socka.type = type;
+ ep->CELL.socket.out.socka.protocol = protocol;
+ ep->CELL.socket.out.socka.kern = kern;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_CONNECT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sock->sk;
+ ep->CELL.socket.in.addr = addr;
+ ep->CELL.socket.value = addr_len;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_bind(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_BIND, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sock->sk;
+ ep->CELL.socket.in.addr = addr;
+ ep->CELL.socket.value = addr_len;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_accept(struct socket *sock, struct socket *newsock)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_ACCEPT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sock->sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_listen(struct socket *sock, int backlog)
+
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_LISTEN, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.value = backlog;
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_socketpair(struct socket *socka, struct socket *sockb)
+{
+ struct sock *ska = socka->sk, *skb = sockb->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_SOCKETPAIR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = ska;
+ ep->CELL.socket.in.sockb = skb;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_sendmsg(struct socket *sock, struct msghdr *msgmsg,
+ int size)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_SENDMSG, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sk;
+ ep->CELL.socket.in.addr = msgmsg->msg_name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_recvmsg(struct socket *sock, struct msghdr *msgmsg,
+ int size, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_RECVMSG, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sk;
+ if (msgmsg->msg_name && msgmsg->msg_namelen > 0)
+ ep->CELL.socket.in.addr = msgmsg->msg_name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_getsockname(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_GETSOCKNAME, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_getpeername(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_GETPEERNAME, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_setsockopt(struct socket *sock, int level, int optname)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_SETSOCKOPT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.value = level;
+ ep->CELL.socket.optname = optname;
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_socket_shutdown(struct socket *sock, int how)
+{
+ struct sock *sk = sock->sk;
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SOCKET_SHUTDOWN, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.value = how;
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_kernel_module_request(char *kmod_name)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_KERNEL_MODULE_REQUEST, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.kernel.in.kmod_name = kmod_name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_kernel_load_data(enum kernel_load_data_id id, bool contents)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_KERNEL_LOAD_DATA, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.kernel.id = id;
+ ep->CELL.kernel.contents = contents;
+
+ return dispatch_event(ep);
+}
+
+
+static int tsem_kernel_read_file(struct file *file,
+ enum kernel_read_file_id id, bool contents)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_KERNEL_READ_FILE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.kernel.id = id;
+ ep->CELL.kernel.contents = contents;
+ ep->CELL.kernel.in.file = file;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sb_mount(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags, void *data)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SB_MOUNT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.flags = flags;
+ ep->CELL.sb.in.dev_name = dev_name;
+ ep->CELL.sb.in.path = path;
+ ep->CELL.sb.in.type = type;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sb_umount(struct vfsmount *mnt, int flags)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SB_UMOUNT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.flags = flags;
+ ep->CELL.sb.in.dentry = mnt->mnt_root;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sb_remount(struct super_block *sb, void *mnt_opts)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SB_REMOUNT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.in.sb = sb;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sb_pivotroot(const struct path *old_path,
+ const struct path *new_path)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SB_PIVOTROOT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.in.path = old_path;
+ ep->CELL.sb.in.path2 = new_path;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sb_statfs(struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SB_STATFS, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.in.dentry = dentry;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_move_mount(const struct path *from_path,
+ const struct path *to_path)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_MOVE_MOUNT, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.sb.in.path = from_path;
+ ep->CELL.sb.in.path2 = to_path;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_shm_associate(struct kern_ipc_perm *perm, int shmflg)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SHM_ASSOCIATE, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = shmflg;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_shm_shmctl(struct kern_ipc_perm *perm, int cmd)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SHM_SHMCTL, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = cmd;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_shm_shmat(struct kern_ipc_perm *perm, char __user *shmaddr,
+ int shmflg)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SHM_SHMAT, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = shmflg;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sem_associate(struct kern_ipc_perm *perm, int semflg)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SEM_ASSOCIATE, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = semflg;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sem_semctl(struct kern_ipc_perm *perm, int cmd)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SEM_SEMCTL, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = cmd;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_sem_semop(struct kern_ipc_perm *perm, struct sembuf *sops,
+ unsigned int nsops, int alter)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SEM_SEMOP, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.nsops = nsops;
+ ep->CELL.ipc.value = alter;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_syslog(int type)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SYSLOG, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.value = type;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_settime(const struct timespec64 *ts, const struct timezone *tz)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_SETTIME, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ if (ts) {
+ ep->CELL.time.have_ts = true;
+ ep->CELL.time.seconds = ts->tv_sec;
+ ep->CELL.time.nsecs = ts->tv_nsec;
+ }
+ if (tz) {
+ ep->CELL.time.have_tz = true;
+ ep->CELL.time.minuteswest = tz->tz_minuteswest;
+ ep->CELL.time.dsttime = tz->tz_dsttime;
+ }
+
+ return dispatch_event(ep);
+}
+
+static int tsem_quotactl(int cmds, int type, int id,
+ const struct super_block *sb)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_QUOTACTL, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.quota.cmds = cmds;
+ ep->CELL.quota.type = type;
+ ep->CELL.quota.id = id;
+ ep->CELL.quota.in.sb = sb;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_quota_on(struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_QUOTA_ON, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.quota.in.dentry = dentry;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_msg_queue_associate(struct kern_ipc_perm *perm, int msqflg)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_MSG_QUEUE_ASSOCIATE, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = msqflg;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_msg_queue_msgsnd(struct kern_ipc_perm *perm,
+ struct msg_msg *msgmsg, int msqflg)
+
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_MSG_QUEUE_MSGSND, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = msqflg;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_msg_queue_msgctl(struct kern_ipc_perm *perm, int cmd)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_MSG_QUEUE_MSGCTL, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.value = cmd;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_msg_queue_msgrcv(struct kern_ipc_perm *perm,
+ struct msg_msg *msgmsg,
+ struct task_struct *target, long type,
+ int mode)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_MSG_QUEUE_MSGRCV, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.in.perm = perm;
+ ep->CELL.ipc.in.target = target;
+ ep->CELL.ipc.type = type;
+ ep->CELL.ipc.value = mode;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_ipc_alloc(struct kern_ipc_perm *kipc)
+{
+ struct tsem_ipc *tipc = tsem_ipc(kipc);
+
+ memcpy(tipc->owner, tsem_task(current)->task_id, tsem_digestsize());
+ return 0;
+}
+
+static int tsem_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_IPC_PERMISSION, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.ipc.perm_flag = flag;
+ ep->CELL.ipc.in.perm = ipcp;
+
+ return dispatch_event(ep);
+}
+
+#ifdef CONFIG_KEYS
+static int tsem_key_alloc(struct key *key, const struct cred *cred,
+ unsigned long flags)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_KEY_ALLOC, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.key.flags = flags;
+ ep->CELL.key.in.cred = cred;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_key_permission(key_ref_t key_ref, const struct cred *cred,
+ unsigned int perm)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_KEY_PERMISSION, LOCKED);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.key.flags = perm;
+ ep->CELL.key.in.cred = cred;
+ ep->CELL.key.in.ref = key_ref;
+
+ return dispatch_event(ep);
+}
+#endif
+
+static int tsem_netlink_send(struct sock *sk, struct sk_buff *skb)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_NETLINK_SEND, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.netlink.in.sock = sk;
+ ep->CELL.netlink.in.parms = (struct netlink_skb_parms *) skb->cb;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_create(struct inode *dir, struct dentry *dentry,
+ umode_t mode)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_CREATE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.mode = mode;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *new_dentry)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_LINK, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = old_dentry;
+ ep->CELL.inode.in.new_dentry = new_dentry;
+ ep->CELL.inode.mode = 0;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_UNLINK, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.mode = 0;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_symlink(struct inode *dir, struct dentry *dentry,
+ const char *old_name)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_SYMLINK, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.in.old_name = old_name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_mkdir(struct inode *dir, struct dentry *dentry,
+ umode_t mode)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_MKDIR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.mode = mode;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_RMDIR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.mode = 0;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_RENAME, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = old_dir;
+ ep->CELL.inode.in.new_dir = new_dir;
+ ep->CELL.inode.in.dentry = old_dentry;
+ ep->CELL.inode.in.new_dentry = new_dentry;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_mknod(struct inode *dir, struct dentry *dentry,
+ umode_t mode, dev_t dev)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_MKNOD, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dir = dir;
+ ep->CELL.inode.in.dentry = dentry;
+ ep->CELL.inode.mode = mode;
+ ep->CELL.inode.dev = dev;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_setattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, struct iattr *attr)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_SETATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_attr.in.dentry = dentry;
+ ep->CELL.inode_attr.in.iattr = attr;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_getattr(const struct path *path)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_GETATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_attr.in.path = path;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_setxattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_SETXATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_xattr.in.dentry = dentry;
+ ep->CELL.inode_xattr.in.name = name;
+ ep->CELL.inode_xattr.in.value = value;
+ ep->CELL.inode_xattr.in.size = size;
+ ep->CELL.inode_xattr.in.flags = flags;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_getxattr(struct dentry *dentry, const char *name)
+{
+ struct tsem_event *ep = NULL;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_GETXATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_xattr.in.dentry = dentry;
+ ep->CELL.inode_xattr.in.name = name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_listxattr(struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (static_branch_unlikely(&tsem_not_ready))
+ return 0;
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_LISTXATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_xattr.in.dentry = dentry;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_removexattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, const char *name)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_REMOVEXATTR, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode_xattr.in.dentry = dentry;
+ ep->CELL.inode_xattr.in.name = name;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_inode_killpriv(struct mnt_idmap *idmap, struct dentry *dentry)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_INODE_KILLPRIV, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.inode.in.dentry = dentry;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_tun_dev_create(void)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TUN_DEV_CREATE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+ ep->no_params = true;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_tun_dev_attach_queue(void *security)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TUN_DEV_ATTACH_QUEUE, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+ ep->no_params = true;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_tun_dev_attach(struct sock *sk, void *security)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TUN_DEV_ATTACH, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.socket.in.socka = sk;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_tun_dev_open(void *security)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_TUN_DEV_OPEN, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+ ep->no_params = true;
+
+ return dispatch_event(ep);
+}
+
+#ifdef CONFIG_BPF_SYSCALL
+static int tsem_bpf(int cmd, union bpf_attr *attr, unsigned int size)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_BPF, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.bpf.bpf.cmd = cmd;
+ ep->CELL.bpf.bpf.size = size;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_bpf_map(struct bpf_map *map, fmode_t fmode)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_BPF_MAP, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.bpf.map.fmode = fmode;
+ ep->CELL.bpf.map.map_type = map->map_type;
+
+ return dispatch_event(ep);
+}
+
+static int tsem_bpf_prog(struct bpf_prog *prog)
+{
+ struct tsem_event *ep;
+
+ if (bypass_event())
+ return 0;
+
+ ep = tsem_event_allocate(TSEM_BPF_PROG, NOLOCK);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->CELL.bpf.prog.type = prog->type;
+ ep->CELL.bpf.prog.attach_type = prog->expected_attach_type;
+
+ return dispatch_event(ep);
+}
+#endif
+
+static struct security_hook_list tsem_hooks[] __ro_after_init = {
+ LSM_HOOK_INIT(task_alloc, tsem_task_alloc),
+ LSM_HOOK_INIT(task_free, tsem_task_free),
+ LSM_HOOK_INIT(task_kill, tsem_task_kill),
+ LSM_HOOK_INIT(task_setpgid, tsem_task_setpgid),
+ LSM_HOOK_INIT(task_getpgid, tsem_task_getpgid),
+ LSM_HOOK_INIT(task_getsid, tsem_task_getsid),
+ LSM_HOOK_INIT(task_setnice, tsem_task_setnice),
+ LSM_HOOK_INIT(task_setioprio, tsem_task_setioprio),
+ LSM_HOOK_INIT(task_getioprio, tsem_task_getioprio),
+ LSM_HOOK_INIT(task_prlimit, tsem_task_prlimit),
+ LSM_HOOK_INIT(task_setrlimit, tsem_task_setrlimit),
+ LSM_HOOK_INIT(task_setscheduler, tsem_task_setscheduler),
+ LSM_HOOK_INIT(task_getscheduler, tsem_task_getscheduler),
+ LSM_HOOK_INIT(task_prctl, tsem_task_prctl),
+
+ LSM_HOOK_INIT(ptrace_access_check, tsem_ptrace_access_check),
+ LSM_HOOK_INIT(ptrace_traceme, tsem_ptrace_traceme),
+
+ LSM_HOOK_INIT(capget, tsem_capget),
+ LSM_HOOK_INIT(capset, tsem_capset),
+ LSM_HOOK_INIT(capable, tsem_capable),
+
+ LSM_HOOK_INIT(bprm_committed_creds, tsem_bprm_committed_creds),
+
+ LSM_HOOK_INIT(inode_alloc_security, tsem_inode_alloc_security),
+ LSM_HOOK_INIT(inode_init_security, tsem_inode_init_security),
+ LSM_HOOK_INIT(inode_free_security, tsem_inode_free_security),
+
+ LSM_HOOK_INIT(file_open, tsem_file_open),
+ LSM_HOOK_INIT(mmap_file, tsem_mmap_file),
+ LSM_HOOK_INIT(file_ioctl, tsem_file_ioctl),
+ LSM_HOOK_INIT(file_lock, tsem_file_lock),
+ LSM_HOOK_INIT(file_fcntl, tsem_file_fcntl),
+ LSM_HOOK_INIT(file_receive, tsem_file_receive),
+
+ LSM_HOOK_INIT(unix_stream_connect, tsem_unix_stream_connect),
+ LSM_HOOK_INIT(unix_may_send, tsem_unix_may_send),
+
+ LSM_HOOK_INIT(socket_post_create, tsem_socket_post_create),
+ LSM_HOOK_INIT(socket_create, tsem_socket_create),
+ LSM_HOOK_INIT(socket_connect, tsem_socket_connect),
+ LSM_HOOK_INIT(socket_bind, tsem_socket_bind),
+ LSM_HOOK_INIT(socket_accept, tsem_socket_accept),
+ LSM_HOOK_INIT(socket_listen, tsem_socket_listen),
+ LSM_HOOK_INIT(socket_socketpair, tsem_socket_socketpair),
+ LSM_HOOK_INIT(socket_sendmsg, tsem_socket_sendmsg),
+ LSM_HOOK_INIT(socket_recvmsg, tsem_socket_recvmsg),
+ LSM_HOOK_INIT(socket_getsockname, tsem_socket_getsockname),
+ LSM_HOOK_INIT(socket_getpeername, tsem_socket_getpeername),
+ LSM_HOOK_INIT(socket_setsockopt, tsem_socket_setsockopt),
+ LSM_HOOK_INIT(socket_shutdown, tsem_socket_shutdown),
+
+ LSM_HOOK_INIT(kernel_module_request, tsem_kernel_module_request),
+ LSM_HOOK_INIT(kernel_load_data, tsem_kernel_load_data),
+ LSM_HOOK_INIT(kernel_read_file, tsem_kernel_read_file),
+
+ LSM_HOOK_INIT(sb_mount, tsem_sb_mount),
+ LSM_HOOK_INIT(sb_umount, tsem_sb_umount),
+ LSM_HOOK_INIT(sb_remount, tsem_sb_remount),
+ LSM_HOOK_INIT(sb_pivotroot, tsem_sb_pivotroot),
+ LSM_HOOK_INIT(sb_statfs, tsem_sb_statfs),
+ LSM_HOOK_INIT(move_mount, tsem_move_mount),
+
+ LSM_HOOK_INIT(shm_alloc_security, tsem_ipc_alloc),
+ LSM_HOOK_INIT(shm_associate, tsem_shm_associate),
+ LSM_HOOK_INIT(shm_shmctl, tsem_shm_shmctl),
+ LSM_HOOK_INIT(shm_shmat, tsem_shm_shmat),
+
+ LSM_HOOK_INIT(sem_alloc_security, tsem_ipc_alloc),
+ LSM_HOOK_INIT(sem_associate, tsem_sem_associate),
+ LSM_HOOK_INIT(sem_semctl, tsem_sem_semctl),
+ LSM_HOOK_INIT(sem_semop, tsem_sem_semop),
+
+ LSM_HOOK_INIT(syslog, tsem_syslog),
+ LSM_HOOK_INIT(settime, tsem_settime),
+
+ LSM_HOOK_INIT(quotactl, tsem_quotactl),
+ LSM_HOOK_INIT(quota_on, tsem_quota_on),
+
+ LSM_HOOK_INIT(msg_queue_alloc_security, tsem_ipc_alloc),
+ LSM_HOOK_INIT(msg_queue_associate, tsem_msg_queue_associate),
+ LSM_HOOK_INIT(msg_queue_msgctl, tsem_msg_queue_msgctl),
+ LSM_HOOK_INIT(msg_queue_msgsnd, tsem_msg_queue_msgsnd),
+ LSM_HOOK_INIT(msg_queue_msgrcv, tsem_msg_queue_msgrcv),
+
+ LSM_HOOK_INIT(ipc_permission, tsem_ipc_permission),
+
+#ifdef CONFIG_KEYS
+ LSM_HOOK_INIT(key_alloc, tsem_key_alloc),
+ LSM_HOOK_INIT(key_permission, tsem_key_permission),
+#endif
+
+ LSM_HOOK_INIT(netlink_send, tsem_netlink_send),
+
+ LSM_HOOK_INIT(inode_create, tsem_inode_create),
+ LSM_HOOK_INIT(inode_link, tsem_inode_link),
+ LSM_HOOK_INIT(inode_unlink, tsem_inode_unlink),
+ LSM_HOOK_INIT(inode_symlink, tsem_inode_symlink),
+ LSM_HOOK_INIT(inode_mkdir, tsem_inode_mkdir),
+ LSM_HOOK_INIT(inode_rmdir, tsem_inode_rmdir),
+ LSM_HOOK_INIT(inode_mknod, tsem_inode_mknod),
+ LSM_HOOK_INIT(inode_rename, tsem_inode_rename),
+ LSM_HOOK_INIT(inode_setattr, tsem_inode_setattr),
+ LSM_HOOK_INIT(inode_getattr, tsem_inode_getattr),
+ LSM_HOOK_INIT(inode_setxattr, tsem_inode_setxattr),
+ LSM_HOOK_INIT(inode_getxattr, tsem_inode_getxattr),
+ LSM_HOOK_INIT(inode_listxattr, tsem_inode_listxattr),
+ LSM_HOOK_INIT(inode_removexattr, tsem_inode_removexattr),
+ LSM_HOOK_INIT(inode_killpriv, tsem_inode_killpriv),
+
+ LSM_HOOK_INIT(tun_dev_create, tsem_tun_dev_create),
+ LSM_HOOK_INIT(tun_dev_attach_queue, tsem_tun_dev_attach_queue),
+ LSM_HOOK_INIT(tun_dev_attach, tsem_tun_dev_attach),
+ LSM_HOOK_INIT(tun_dev_open, tsem_tun_dev_open),
+
+#ifdef CONFIG_BPF_SYSCALL
+ LSM_HOOK_INIT(bpf, tsem_bpf),
+ LSM_HOOK_INIT(bpf_map, tsem_bpf_map),
+ LSM_HOOK_INIT(bpf_prog, tsem_bpf_prog)
+#endif
+};
+
+static int configure_root_digest(void)
+{
+ int retn = 0;
+ char *digest = NULL;
+ u8 zero_digest[HASH_MAX_DIGESTSIZE];
+ struct crypto_shash *tfm;
+ SHASH_DESC_ON_STACK(shash, tfm);
+
+ if (default_hash_function && crypto_has_shash(default_hash_function,
+ 0, 0)) {
+ digest = default_hash_function;
+ pr_warn("tsem: Using digest %s from command-line.\n", digest);
+ }
+ if (!digest && default_hash_function)
+ pr_warn("tsem: Unknown root digest %s, using sha256.\n",
+ default_hash_function);
+ if (!digest)
+ digest = "sha256";
+
+ tsem_context(current)->digestname = kstrdup(digest, GFP_KERNEL);
+ if (!tsem_context(current)->digestname)
+ return -ENOMEM;
+
+ tfm = crypto_alloc_shash(digest, 0, 0);
+ if (IS_ERR(tfm))
+ return PTR_ERR(tfm);
+
+ shash->tfm = tfm;
+ retn = crypto_shash_digest(shash, NULL, 0, zero_digest);
+ if (retn)
+ goto done;
+
+ tsem_context(current)->tfm = tfm;
+ memcpy(root_context.zero_digest, zero_digest,
+ crypto_shash_digestsize(tfm));
+
+ done:
+ if (retn) {
+ kfree(tsem_context(current)->digestname);
+ crypto_free_shash(tfm);
+ }
+
+ return retn;
+}
+
+static int __init set_ready(void)
+{
+ int retn;
+
+ if (!tsem_available)
+ return 0;
+
+ retn = configure_root_digest();
+ if (retn)
+ goto done;
+
+ retn = tsem_model_add_aggregate();
+ if (retn)
+ goto done;
+
+ retn = tsem_fs_init();
+ if (retn)
+ goto done;
+
+ if (tsem_mode == EXPORT_ONLY) {
+ retn = tsem_ns_export_root(magazine_size);
+ if (retn)
+ goto done;
+ }
+
+ pr_info("tsem: Now active.\n");
+ static_branch_disable(&tsem_not_ready);
+
+ done:
+ return retn;
+}
+
+late_initcall(set_ready);
+
+/**
+ * tesm_init() - Register Trusted Security Event Modeling LSM.
+ *
+ * This function is responsible for initializing the TSEM LSM. It is
+ * invoked at the fs_initcall level. In addition to configuring the
+ * LSM hooks this function initializes the Trusted Modeling Agent
+ * context including the event actions. The cache from which
+ * the tsem_event description structures is also initialized.
+ *
+ * Return: If the TSEM LSM is successfully initialized a value of zero
+ * is returned. A non-zero error code is returned if
+ * initialization fails. Currently the only failure mode can
+ * come from the initialization of the tsem_event cache.
+ */
+static int __init tsem_init(void)
+{
+ int retn;
+ char *msg;
+ struct tsem_task *tsk = tsem_task(current);
+ struct tsem_context *ctx = &root_context;
+ struct tsem_model *model = &root_model;
+
+ security_add_hooks(tsem_hooks, ARRAY_SIZE(tsem_hooks), &tsem_lsmid);
+
+ tsk->context = ctx;
+ kref_init(&ctx->kref);
+ kref_get(&ctx->kref);
+
+ mutex_init(&ctx->inode_mutex);
+ INIT_LIST_HEAD(&ctx->inode_list);
+
+ root_context.model = &root_model;
+
+ retn = tsem_event_cache_init();
+ if (retn)
+ return retn;
+ retn = tsem_event_magazine_allocate(ctx, magazine_size);
+ if (retn)
+ goto done;
+
+ memcpy(ctx->actions, tsem_root_actions, sizeof(tsem_root_actions));
+
+ retn = tsem_model_cache_init(model, magazine_size);
+ if (retn)
+ goto done;
+
+ retn = tsem_export_cache_init();
+ if (retn)
+ goto done;
+
+ switch (tsem_mode) {
+ case FULL_MODELING:
+ msg = "full";
+ break;
+ case NO_ROOT_MODELING:
+ msg = "namespace only";
+ break;
+ case EXPORT_ONLY:
+ msg = "export";
+ break;
+ }
+ pr_info("tsem: Initialized %s modeling.\n", msg);
+
+ tsem_available = true;
+ tsk->trust_status = TSEM_TASK_TRUSTED;
+ retn = 0;
+
+ done:
+ if (retn) {
+ tsem_event_magazine_free(ctx);
+ tsem_model_magazine_free(model);
+ }
+ return retn;
+}
+
+DEFINE_LSM(tsem) = {
+ .name = "tsem",
+ .init = tsem_init,
+ .blobs = &tsem_blob_sizes,
+};
--
2.39.1
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