* Handles all system-call specific auditing features.
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
+ * Copyright 2005 Hewlett-Packard Development Company, L.P.
+ * Copyright (C) 2005, 2006 IBM Corporation
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* this file -- see entry.S) is based on a GPL'd patch written by
* okir@suse.de and Copyright 2003 SuSE Linux AG.
*
+ * POSIX message queue support added by George Wilson <ltcgcw@us.ibm.com>,
+ * 2006.
+ *
+ * The support of additional filter rules compares (>, <, >=, <=) was
+ * added by Dustin Kirkland <dustin.kirkland@us.ibm.com>, 2005.
+ *
+ * Modified by Amy Griffis <amy.griffis@hp.com> to collect additional
+ * filesystem information.
+ *
+ * Subject and object context labeling support added by <danjones@us.ibm.com>
+ * and <dustin.kirkland@us.ibm.com> for LSPP certification compliance.
*/
#include <linux/init.h>
+#include <asm/types.h>
#include <asm/atomic.h>
#include <asm/types.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/socket.h>
+#include <linux/mqueue.h>
#include <linux/audit.h>
#include <linux/personality.h>
#include <linux/time.h>
+#include <linux/netlink.h>
+#include <linux/compiler.h>
#include <asm/unistd.h>
+#include <linux/security.h>
+#include <linux/list.h>
+#include <linux/tty.h>
+#include <linux/selinux.h>
+#include <linux/binfmts.h>
+#include <linux/syscalls.h>
+
+#include "audit.h"
-/* 0 = no checking
- 1 = put_count checking
- 2 = verbose put_count checking
-*/
-#define AUDIT_DEBUG 0
+extern struct list_head audit_filter_list[];
/* No syscall auditing will take place unless audit_enabled != 0. */
extern int audit_enabled;
* path_lookup. */
#define AUDIT_NAMES_RESERVED 7
-/* At task start time, the audit_state is set in the audit_context using
- a per-task filter. At syscall entry, the audit_state is augmented by
- the syscall filter. */
-enum audit_state {
- AUDIT_DISABLED, /* Do not create per-task audit_context.
- * No syscall-specific audit records can
- * be generated. */
- AUDIT_SETUP_CONTEXT, /* Create the per-task audit_context,
- * but don't necessarily fill it in at
- * syscall entry time (i.e., filter
- * instead). */
- AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context,
- * and always fill it in at syscall
- * entry time. This makes a full
- * syscall record available if some
- * other part of the kernel decides it
- * should be recorded. */
- AUDIT_RECORD_CONTEXT /* Create the per-task audit_context,
- * always fill it in at syscall entry
- * time, and always write out the audit
- * record at syscall exit time. */
-};
-
/* When fs/namei.c:getname() is called, we store the pointer in name and
* we don't let putname() free it (instead we free all of the saved
* pointers at syscall exit time).
struct audit_names {
const char *name;
unsigned long ino;
+ unsigned long pino;
dev_t dev;
umode_t mode;
uid_t uid;
gid_t gid;
dev_t rdev;
+ u32 osid;
};
struct audit_aux_data {
#define AUDIT_AUX_IPCPERM 0
+struct audit_aux_data_mq_open {
+ struct audit_aux_data d;
+ int oflag;
+ mode_t mode;
+ struct mq_attr attr;
+};
+
+struct audit_aux_data_mq_sendrecv {
+ struct audit_aux_data d;
+ mqd_t mqdes;
+ size_t msg_len;
+ unsigned int msg_prio;
+ struct timespec abs_timeout;
+};
+
+struct audit_aux_data_mq_notify {
+ struct audit_aux_data d;
+ mqd_t mqdes;
+ struct sigevent notification;
+};
+
+struct audit_aux_data_mq_getsetattr {
+ struct audit_aux_data d;
+ mqd_t mqdes;
+ struct mq_attr mqstat;
+};
+
struct audit_aux_data_ipcctl {
struct audit_aux_data d;
struct ipc_perm p;
uid_t uid;
gid_t gid;
mode_t mode;
+ u32 osid;
+};
+
+struct audit_aux_data_execve {
+ struct audit_aux_data d;
+ int argc;
+ int envc;
+ char mem[0];
};
struct audit_aux_data_socketcall {
int auditable; /* 1 if record should be written */
int name_count;
struct audit_names names[AUDIT_NAMES];
+ struct dentry * pwd;
+ struct vfsmount * pwdmnt;
struct audit_context *previous; /* For nested syscalls */
struct audit_aux_data *aux;
/* Save things to print about task_struct */
- pid_t pid;
+ pid_t pid, ppid;
uid_t uid, euid, suid, fsuid;
gid_t gid, egid, sgid, fsgid;
unsigned long personality;
#endif
};
- /* Public API */
-/* There are three lists of rules -- one to search at task creation
- * time, one to search at syscall entry time, and another to search at
- * syscall exit time. */
-static LIST_HEAD(audit_tsklist);
-static LIST_HEAD(audit_entlist);
-static LIST_HEAD(audit_extlist);
-
-struct audit_entry {
- struct list_head list;
- struct rcu_head rcu;
- struct audit_rule rule;
-};
-
-extern int audit_pid;
-
-/* Check to see if two rules are identical. It is called from
- * audit_del_rule during AUDIT_DEL. */
-static int audit_compare_rule(struct audit_rule *a, struct audit_rule *b)
-{
- int i;
-
- if (a->flags != b->flags)
- return 1;
-
- if (a->action != b->action)
- return 1;
-
- if (a->field_count != b->field_count)
- return 1;
-
- for (i = 0; i < a->field_count; i++) {
- if (a->fields[i] != b->fields[i]
- || a->values[i] != b->values[i])
- return 1;
- }
-
- for (i = 0; i < AUDIT_BITMASK_SIZE; i++)
- if (a->mask[i] != b->mask[i])
- return 1;
-
- return 0;
-}
-
-/* Note that audit_add_rule and audit_del_rule are called via
- * audit_receive() in audit.c, and are protected by
- * audit_netlink_sem. */
-static inline int audit_add_rule(struct audit_entry *entry,
- struct list_head *list)
-{
- if (entry->rule.flags & AUDIT_PREPEND) {
- entry->rule.flags &= ~AUDIT_PREPEND;
- list_add_rcu(&entry->list, list);
- } else {
- list_add_tail_rcu(&entry->list, list);
- }
- return 0;
-}
-
-static void audit_free_rule(struct rcu_head *head)
-{
- struct audit_entry *e = container_of(head, struct audit_entry, rcu);
- kfree(e);
-}
-
-/* Note that audit_add_rule and audit_del_rule are called via
- * audit_receive() in audit.c, and are protected by
- * audit_netlink_sem. */
-static inline int audit_del_rule(struct audit_rule *rule,
- struct list_head *list)
-{
- struct audit_entry *e;
-
- /* Do not use the _rcu iterator here, since this is the only
- * deletion routine. */
- list_for_each_entry(e, list, list) {
- if (!audit_compare_rule(rule, &e->rule)) {
- list_del_rcu(&e->list);
- call_rcu(&e->rcu, audit_free_rule);
- return 0;
- }
- }
- return -EFAULT; /* No matching rule */
-}
-
-/* Copy rule from user-space to kernel-space. Called during
- * AUDIT_ADD. */
-static int audit_copy_rule(struct audit_rule *d, struct audit_rule *s)
-{
- int i;
-
- if (s->action != AUDIT_NEVER
- && s->action != AUDIT_POSSIBLE
- && s->action != AUDIT_ALWAYS)
- return -1;
- if (s->field_count < 0 || s->field_count > AUDIT_MAX_FIELDS)
- return -1;
-
- d->flags = s->flags;
- d->action = s->action;
- d->field_count = s->field_count;
- for (i = 0; i < d->field_count; i++) {
- d->fields[i] = s->fields[i];
- d->values[i] = s->values[i];
- }
- for (i = 0; i < AUDIT_BITMASK_SIZE; i++) d->mask[i] = s->mask[i];
- return 0;
-}
-
-int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
- uid_t loginuid)
-{
- u32 flags;
- struct audit_entry *entry;
- int err = 0;
-
- switch (type) {
- case AUDIT_LIST:
- /* The *_rcu iterators not needed here because we are
- always called with audit_netlink_sem held. */
- list_for_each_entry(entry, &audit_tsklist, list)
- audit_send_reply(pid, seq, AUDIT_LIST, 0, 1,
- &entry->rule, sizeof(entry->rule));
- list_for_each_entry(entry, &audit_entlist, list)
- audit_send_reply(pid, seq, AUDIT_LIST, 0, 1,
- &entry->rule, sizeof(entry->rule));
- list_for_each_entry(entry, &audit_extlist, list)
- audit_send_reply(pid, seq, AUDIT_LIST, 0, 1,
- &entry->rule, sizeof(entry->rule));
- audit_send_reply(pid, seq, AUDIT_LIST, 1, 1, NULL, 0);
- break;
- case AUDIT_ADD:
- if (!(entry = kmalloc(sizeof(*entry), GFP_KERNEL)))
- return -ENOMEM;
- if (audit_copy_rule(&entry->rule, data)) {
- kfree(entry);
- return -EINVAL;
- }
- flags = entry->rule.flags;
- if (!err && (flags & AUDIT_PER_TASK))
- err = audit_add_rule(entry, &audit_tsklist);
- if (!err && (flags & AUDIT_AT_ENTRY))
- err = audit_add_rule(entry, &audit_entlist);
- if (!err && (flags & AUDIT_AT_EXIT))
- err = audit_add_rule(entry, &audit_extlist);
- audit_log(NULL, AUDIT_CONFIG_CHANGE,
- "auid %u added an audit rule\n", loginuid);
- break;
- case AUDIT_DEL:
- flags =((struct audit_rule *)data)->flags;
- if (!err && (flags & AUDIT_PER_TASK))
- err = audit_del_rule(data, &audit_tsklist);
- if (!err && (flags & AUDIT_AT_ENTRY))
- err = audit_del_rule(data, &audit_entlist);
- if (!err && (flags & AUDIT_AT_EXIT))
- err = audit_del_rule(data, &audit_extlist);
- audit_log(NULL, AUDIT_CONFIG_CHANGE,
- "auid %u removed an audit rule\n", loginuid);
- break;
- default:
- return -EINVAL;
- }
-
- return err;
-}
/* Compare a task_struct with an audit_rule. Return 1 on match, 0
* otherwise. */
static int audit_filter_rules(struct task_struct *tsk,
- struct audit_rule *rule,
+ struct audit_krule *rule,
struct audit_context *ctx,
enum audit_state *state)
{
- int i, j;
+ int i, j, need_sid = 1;
+ u32 sid;
for (i = 0; i < rule->field_count; i++) {
- u32 field = rule->fields[i] & ~AUDIT_NEGATE;
- u32 value = rule->values[i];
+ struct audit_field *f = &rule->fields[i];
int result = 0;
- switch (field) {
+ switch (f->type) {
case AUDIT_PID:
- result = (tsk->pid == value);
+ result = audit_comparator(tsk->pid, f->op, f->val);
+ break;
+ case AUDIT_PPID:
+ if (ctx)
+ result = audit_comparator(ctx->ppid, f->op, f->val);
break;
case AUDIT_UID:
- result = (tsk->uid == value);
+ result = audit_comparator(tsk->uid, f->op, f->val);
break;
case AUDIT_EUID:
- result = (tsk->euid == value);
+ result = audit_comparator(tsk->euid, f->op, f->val);
break;
case AUDIT_SUID:
- result = (tsk->suid == value);
+ result = audit_comparator(tsk->suid, f->op, f->val);
break;
case AUDIT_FSUID:
- result = (tsk->fsuid == value);
+ result = audit_comparator(tsk->fsuid, f->op, f->val);
break;
case AUDIT_GID:
- result = (tsk->gid == value);
+ result = audit_comparator(tsk->gid, f->op, f->val);
break;
case AUDIT_EGID:
- result = (tsk->egid == value);
+ result = audit_comparator(tsk->egid, f->op, f->val);
break;
case AUDIT_SGID:
- result = (tsk->sgid == value);
+ result = audit_comparator(tsk->sgid, f->op, f->val);
break;
case AUDIT_FSGID:
- result = (tsk->fsgid == value);
+ result = audit_comparator(tsk->fsgid, f->op, f->val);
break;
case AUDIT_PERS:
- result = (tsk->personality == value);
+ result = audit_comparator(tsk->personality, f->op, f->val);
break;
case AUDIT_ARCH:
- if (ctx)
- result = (ctx->arch == value);
+ if (ctx)
+ result = audit_comparator(ctx->arch, f->op, f->val);
break;
case AUDIT_EXIT:
if (ctx && ctx->return_valid)
- result = (ctx->return_code == value);
+ result = audit_comparator(ctx->return_code, f->op, f->val);
break;
case AUDIT_SUCCESS:
- if (ctx && ctx->return_valid)
- result = (ctx->return_valid == AUDITSC_SUCCESS);
+ if (ctx && ctx->return_valid) {
+ if (f->val)
+ result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
+ else
+ result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
+ }
break;
case AUDIT_DEVMAJOR:
if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
- if (MAJOR(ctx->names[j].dev)==value) {
+ if (audit_comparator(MAJOR(ctx->names[j].dev), f->op, f->val)) {
++result;
break;
}
case AUDIT_DEVMINOR:
if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
- if (MINOR(ctx->names[j].dev)==value) {
+ if (audit_comparator(MINOR(ctx->names[j].dev), f->op, f->val)) {
++result;
break;
}
case AUDIT_INODE:
if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
- if (ctx->names[j].ino == value) {
+ if (audit_comparator(ctx->names[j].ino, f->op, f->val) ||
+ audit_comparator(ctx->names[j].pino, f->op, f->val)) {
++result;
break;
}
case AUDIT_LOGINUID:
result = 0;
if (ctx)
- result = (ctx->loginuid == value);
+ result = audit_comparator(ctx->loginuid, f->op, f->val);
+ break;
+ case AUDIT_SE_USER:
+ case AUDIT_SE_ROLE:
+ case AUDIT_SE_TYPE:
+ case AUDIT_SE_SEN:
+ case AUDIT_SE_CLR:
+ /* NOTE: this may return negative values indicating
+ a temporary error. We simply treat this as a
+ match for now to avoid losing information that
+ may be wanted. An error message will also be
+ logged upon error */
+ if (f->se_rule) {
+ if (need_sid) {
+ selinux_task_ctxid(tsk, &sid);
+ need_sid = 0;
+ }
+ result = selinux_audit_rule_match(sid, f->type,
+ f->op,
+ f->se_rule,
+ ctx);
+ }
break;
case AUDIT_ARG0:
case AUDIT_ARG1:
case AUDIT_ARG2:
case AUDIT_ARG3:
if (ctx)
- result = (ctx->argv[field-AUDIT_ARG0]==value);
+ result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
break;
}
- if (rule->fields[i] & AUDIT_NEGATE)
- result = !result;
if (!result)
return 0;
}
switch (rule->action) {
case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
- case AUDIT_POSSIBLE: *state = AUDIT_BUILD_CONTEXT; break;
case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break;
}
return 1;
enum audit_state state;
rcu_read_lock();
- list_for_each_entry_rcu(e, &audit_tsklist, list) {
+ list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
if (audit_filter_rules(tsk, &e->rule, NULL, &state)) {
rcu_read_unlock();
return state;
/* At syscall entry and exit time, this filter is called if the
* audit_state is not low enough that auditing cannot take place, but is
* also not high enough that we already know we have to write an audit
- * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
+ * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
*/
static enum audit_state audit_filter_syscall(struct task_struct *tsk,
struct audit_context *ctx,
struct list_head *list)
{
struct audit_entry *e;
- enum audit_state state;
- int word = AUDIT_WORD(ctx->major);
- int bit = AUDIT_BIT(ctx->major);
+ enum audit_state state;
+
+ if (audit_pid && tsk->tgid == audit_pid)
+ return AUDIT_DISABLED;
rcu_read_lock();
- list_for_each_entry_rcu(e, list, list) {
- if ((e->rule.mask[word] & bit) == bit
- && audit_filter_rules(tsk, &e->rule, ctx, &state)) {
- rcu_read_unlock();
- return state;
+ if (!list_empty(list)) {
+ int word = AUDIT_WORD(ctx->major);
+ int bit = AUDIT_BIT(ctx->major);
+
+ list_for_each_entry_rcu(e, list, list) {
+ if ((e->rule.mask[word] & bit) == bit
+ && audit_filter_rules(tsk, &e->rule, ctx, &state)) {
+ rcu_read_unlock();
+ return state;
+ }
}
}
rcu_read_unlock();
return AUDIT_BUILD_CONTEXT;
}
-/* This should be called with task_lock() held. */
static inline struct audit_context *audit_get_context(struct task_struct *tsk,
int return_valid,
int return_code)
if (context->in_syscall && !context->auditable) {
enum audit_state state;
- state = audit_filter_syscall(tsk, context, &audit_extlist);
+ state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
if (state == AUDIT_RECORD_CONTEXT)
context->auditable = 1;
}
context->pid = tsk->pid;
+ context->ppid = sys_getppid(); /* sic. tsk == current in all cases */
context->uid = tsk->uid;
context->gid = tsk->gid;
context->euid = tsk->euid;
#if AUDIT_DEBUG == 2
if (context->auditable
||context->put_count + context->ino_count != context->name_count) {
- printk(KERN_ERR "audit.c:%d(:%d): major=%d in_syscall=%d"
+ printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d"
" name_count=%d put_count=%d"
" ino_count=%d [NOT freeing]\n",
- __LINE__,
+ __FILE__, __LINE__,
context->serial, context->major, context->in_syscall,
context->name_count, context->put_count,
context->ino_count);
- for (i = 0; i < context->name_count; i++)
+ for (i = 0; i < context->name_count; i++) {
printk(KERN_ERR "names[%d] = %p = %s\n", i,
context->names[i].name,
- context->names[i].name);
+ context->names[i].name ?: "(null)");
+ }
dump_stack();
return;
}
context->ino_count = 0;
#endif
- for (i = 0; i < context->name_count; i++)
+ for (i = 0; i < context->name_count; i++) {
if (context->names[i].name)
__putname(context->names[i].name);
+ }
context->name_count = 0;
+ if (context->pwd)
+ dput(context->pwd);
+ if (context->pwdmnt)
+ mntput(context->pwdmnt);
+ context->pwd = NULL;
+ context->pwdmnt = NULL;
}
static inline void audit_free_aux(struct audit_context *context)
dput(axi->dentry);
mntput(axi->mnt);
}
+
context->aux = aux->next;
kfree(aux);
}
return context;
}
-/* Filter on the task information and allocate a per-task audit context
+/**
+ * audit_alloc - allocate an audit context block for a task
+ * @tsk: task
+ *
+ * Filter on the task information and allocate a per-task audit context
* if necessary. Doing so turns on system call auditing for the
* specified task. This is called from copy_process, so no lock is
- * needed. */
+ * needed.
+ */
int audit_alloc(struct task_struct *tsk)
{
struct audit_context *context;
printk(KERN_ERR "audit: freed %d contexts\n", count);
}
-static void audit_log_task_info(struct audit_buffer *ab)
+static void audit_log_task_context(struct audit_buffer *ab)
{
- char name[sizeof(current->comm)];
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
+ char *ctx = NULL;
+ ssize_t len = 0;
- get_task_comm(name, current);
- audit_log_format(ab, " comm=%s", name);
-
- if (!mm)
+ len = security_getprocattr(current, "current", NULL, 0);
+ if (len < 0) {
+ if (len != -EINVAL)
+ goto error_path;
return;
+ }
- down_read(&mm->mmap_sem);
- vma = mm->mmap;
- while (vma) {
- if ((vma->vm_flags & VM_EXECUTABLE) &&
- vma->vm_file) {
- audit_log_d_path(ab, "exe=",
- vma->vm_file->f_dentry,
- vma->vm_file->f_vfsmnt);
- break;
+ ctx = kmalloc(len, GFP_KERNEL);
+ if (!ctx)
+ goto error_path;
+
+ len = security_getprocattr(current, "current", ctx, len);
+ if (len < 0 )
+ goto error_path;
+
+ audit_log_format(ab, " subj=%s", ctx);
+ return;
+
+error_path:
+ if (ctx)
+ kfree(ctx);
+ audit_panic("error in audit_log_task_context");
+ return;
+}
+
+static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
+{
+ char name[sizeof(tsk->comm)];
+ struct mm_struct *mm = tsk->mm;
+ struct vm_area_struct *vma;
+
+ /* tsk == current */
+
+ get_task_comm(name, tsk);
+ audit_log_format(ab, " comm=");
+ audit_log_untrustedstring(ab, name);
+
+ if (mm) {
+ down_read(&mm->mmap_sem);
+ vma = mm->mmap;
+ while (vma) {
+ if ((vma->vm_flags & VM_EXECUTABLE) &&
+ vma->vm_file) {
+ audit_log_d_path(ab, "exe=",
+ vma->vm_file->f_dentry,
+ vma->vm_file->f_vfsmnt);
+ break;
+ }
+ vma = vma->vm_next;
}
- vma = vma->vm_next;
+ up_read(&mm->mmap_sem);
}
- up_read(&mm->mmap_sem);
+ audit_log_task_context(ab);
}
-static void audit_log_exit(struct audit_context *context)
+static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
{
- int i;
+ int i, call_panic = 0;
struct audit_buffer *ab;
+ struct audit_aux_data *aux;
+ const char *tty;
- ab = audit_log_start(context, AUDIT_SYSCALL);
+ /* tsk == current */
+
+ ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
if (!ab)
return; /* audit_panic has been called */
- audit_log_format(ab, "syscall=%d", context->major);
+ audit_log_format(ab, "arch=%x syscall=%d",
+ context->arch, context->major);
if (context->personality != PER_LINUX)
audit_log_format(ab, " per=%lx", context->personality);
- audit_log_format(ab, " arch=%x", context->arch);
if (context->return_valid)
audit_log_format(ab, " success=%s exit=%ld",
(context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
context->return_code);
+ if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
+ tty = tsk->signal->tty->name;
+ else
+ tty = "(none)";
audit_log_format(ab,
" a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
- " pid=%d auid=%u uid=%u gid=%u"
+ " ppid=%d pid=%d auid=%u uid=%u gid=%u"
" euid=%u suid=%u fsuid=%u"
- " egid=%u sgid=%u fsgid=%u",
+ " egid=%u sgid=%u fsgid=%u tty=%s",
context->argv[0],
context->argv[1],
context->argv[2],
context->argv[3],
context->name_count,
+ context->ppid,
context->pid,
context->loginuid,
context->uid,
context->gid,
context->euid, context->suid, context->fsuid,
- context->egid, context->sgid, context->fsgid);
- audit_log_task_info(ab);
+ context->egid, context->sgid, context->fsgid, tty);
+ audit_log_task_info(ab, tsk);
audit_log_end(ab);
- while (context->aux) {
- struct audit_aux_data *aux;
- aux = context->aux;
+ for (aux = context->aux; aux; aux = aux->next) {
- ab = audit_log_start(context, aux->type);
+ ab = audit_log_start(context, GFP_KERNEL, aux->type);
if (!ab)
continue; /* audit_panic has been called */
switch (aux->type) {
+ case AUDIT_MQ_OPEN: {
+ struct audit_aux_data_mq_open *axi = (void *)aux;
+ audit_log_format(ab,
+ "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
+ "mq_msgsize=%ld mq_curmsgs=%ld",
+ axi->oflag, axi->mode, axi->attr.mq_flags,
+ axi->attr.mq_maxmsg, axi->attr.mq_msgsize,
+ axi->attr.mq_curmsgs);
+ break; }
+
+ case AUDIT_MQ_SENDRECV: {
+ struct audit_aux_data_mq_sendrecv *axi = (void *)aux;
+ audit_log_format(ab,
+ "mqdes=%d msg_len=%zd msg_prio=%u "
+ "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
+ axi->mqdes, axi->msg_len, axi->msg_prio,
+ axi->abs_timeout.tv_sec, axi->abs_timeout.tv_nsec);
+ break; }
+
+ case AUDIT_MQ_NOTIFY: {
+ struct audit_aux_data_mq_notify *axi = (void *)aux;
+ audit_log_format(ab,
+ "mqdes=%d sigev_signo=%d",
+ axi->mqdes,
+ axi->notification.sigev_signo);
+ break; }
+
+ case AUDIT_MQ_GETSETATTR: {
+ struct audit_aux_data_mq_getsetattr *axi = (void *)aux;
+ audit_log_format(ab,
+ "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
+ "mq_curmsgs=%ld ",
+ axi->mqdes,
+ axi->mqstat.mq_flags, axi->mqstat.mq_maxmsg,
+ axi->mqstat.mq_msgsize, axi->mqstat.mq_curmsgs);
+ break; }
+
case AUDIT_IPC: {
struct audit_aux_data_ipcctl *axi = (void *)aux;
audit_log_format(ab,
- " qbytes=%lx iuid=%u igid=%u mode=%x",
- axi->qbytes, axi->uid, axi->gid, axi->mode);
+ "ouid=%u ogid=%u mode=%x",
+ axi->uid, axi->gid, axi->mode);
+ if (axi->osid != 0) {
+ char *ctx = NULL;
+ u32 len;
+ if (selinux_ctxid_to_string(
+ axi->osid, &ctx, &len)) {
+ audit_log_format(ab, " osid=%u",
+ axi->osid);
+ call_panic = 1;
+ } else
+ audit_log_format(ab, " obj=%s", ctx);
+ kfree(ctx);
+ }
+ break; }
+
+ case AUDIT_IPC_SET_PERM: {
+ struct audit_aux_data_ipcctl *axi = (void *)aux;
+ audit_log_format(ab,
+ "qbytes=%lx ouid=%u ogid=%u mode=%x",
+ axi->qbytes, axi->uid, axi->gid, axi->mode);
+ break; }
+
+ case AUDIT_EXECVE: {
+ struct audit_aux_data_execve *axi = (void *)aux;
+ int i;
+ const char *p;
+ for (i = 0, p = axi->mem; i < axi->argc; i++) {
+ audit_log_format(ab, "a%d=", i);
+ p = audit_log_untrustedstring(ab, p);
+ audit_log_format(ab, "\n");
+ }
break; }
case AUDIT_SOCKETCALL: {
case AUDIT_AVC_PATH: {
struct audit_aux_data_path *axi = (void *)aux;
audit_log_d_path(ab, "path=", axi->dentry, axi->mnt);
- dput(axi->dentry);
- mntput(axi->mnt);
break; }
}
audit_log_end(ab);
-
- context->aux = aux->next;
- kfree(aux);
}
+ if (context->pwd && context->pwdmnt) {
+ ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
+ if (ab) {
+ audit_log_d_path(ab, "cwd=", context->pwd, context->pwdmnt);
+ audit_log_end(ab);
+ }
+ }
for (i = 0; i < context->name_count; i++) {
- ab = audit_log_start(context, AUDIT_PATH);
+ unsigned long ino = context->names[i].ino;
+ unsigned long pino = context->names[i].pino;
+
+ ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
if (!ab)
continue; /* audit_panic has been called */
+
audit_log_format(ab, "item=%d", i);
- if (context->names[i].name) {
- audit_log_format(ab, " name=");
+
+ audit_log_format(ab, " name=");
+ if (context->names[i].name)
audit_log_untrustedstring(ab, context->names[i].name);
- }
- if (context->names[i].ino != (unsigned long)-1)
- audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#o"
- " ouid=%u ogid=%u rdev=%02x:%02x",
- context->names[i].ino,
- MAJOR(context->names[i].dev),
- MINOR(context->names[i].dev),
- context->names[i].mode,
- context->names[i].uid,
- context->names[i].gid,
- MAJOR(context->names[i].rdev),
+ else
+ audit_log_format(ab, "(null)");
+
+ if (pino != (unsigned long)-1)
+ audit_log_format(ab, " parent=%lu", pino);
+ if (ino != (unsigned long)-1)
+ audit_log_format(ab, " inode=%lu", ino);
+ if ((pino != (unsigned long)-1) || (ino != (unsigned long)-1))
+ audit_log_format(ab, " dev=%02x:%02x mode=%#o"
+ " ouid=%u ogid=%u rdev=%02x:%02x",
+ MAJOR(context->names[i].dev),
+ MINOR(context->names[i].dev),
+ context->names[i].mode,
+ context->names[i].uid,
+ context->names[i].gid,
+ MAJOR(context->names[i].rdev),
MINOR(context->names[i].rdev));
+ if (context->names[i].osid != 0) {
+ char *ctx = NULL;
+ u32 len;
+ if (selinux_ctxid_to_string(
+ context->names[i].osid, &ctx, &len)) {
+ audit_log_format(ab, " osid=%u",
+ context->names[i].osid);
+ call_panic = 2;
+ } else
+ audit_log_format(ab, " obj=%s", ctx);
+ kfree(ctx);
+ }
+
audit_log_end(ab);
}
+ if (call_panic)
+ audit_panic("error converting sid to string");
}
-/* Free a per-task audit context. Called from copy_process and
- * __put_task_struct. */
+/**
+ * audit_free - free a per-task audit context
+ * @tsk: task whose audit context block to free
+ *
+ * Called from copy_process and do_exit
+ */
void audit_free(struct task_struct *tsk)
{
struct audit_context *context;
- task_lock(tsk);
context = audit_get_context(tsk, 0, 0);
- task_unlock(tsk);
-
if (likely(!context))
return;
/* Check for system calls that do not go through the exit
- * function (e.g., exit_group), then free context block. */
- if (context->in_syscall && context->auditable && context->pid != audit_pid)
- audit_log_exit(context);
+ * function (e.g., exit_group), then free context block.
+ * We use GFP_ATOMIC here because we might be doing this
+ * in the context of the idle thread */
+ /* that can happen only if we are called from do_exit() */
+ if (context->in_syscall && context->auditable)
+ audit_log_exit(context, tsk);
audit_free_context(context);
}
-/* Compute a serial number for the audit record. Audit records are
- * written to user-space as soon as they are generated, so a complete
- * audit record may be written in several pieces. The timestamp of the
- * record and this serial number are used by the user-space tools to
- * determine which pieces belong to the same audit record. The
- * (timestamp,serial) tuple is unique for each syscall and is live from
- * syscall entry to syscall exit.
- *
- * Atomic values are only guaranteed to be 24-bit, so we count down.
+/**
+ * audit_syscall_entry - fill in an audit record at syscall entry
+ * @tsk: task being audited
+ * @arch: architecture type
+ * @major: major syscall type (function)
+ * @a1: additional syscall register 1
+ * @a2: additional syscall register 2
+ * @a3: additional syscall register 3
+ * @a4: additional syscall register 4
*
- * NOTE: Another possibility is to store the formatted records off the
- * audit context (for those records that have a context), and emit them
- * all at syscall exit. However, this could delay the reporting of
- * significant errors until syscall exit (or never, if the system
- * halts). */
-static inline unsigned int audit_serial(void)
-{
- static atomic_t serial = ATOMIC_INIT(0xffffff);
- unsigned int a, b;
-
- do {
- a = atomic_read(&serial);
- if (atomic_dec_and_test(&serial))
- atomic_set(&serial, 0xffffff);
- b = atomic_read(&serial);
- } while (b != a - 1);
-
- return 0xffffff - b;
-}
-
-/* Fill in audit context at syscall entry. This only happens if the
+ * Fill in audit context at syscall entry. This only happens if the
* audit context was created when the task was created and the state or
* filters demand the audit context be built. If the state from the
* per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
* then the record will be written at syscall exit time (otherwise, it
* will only be written if another part of the kernel requests that it
- * be written). */
-void audit_syscall_entry(struct task_struct *tsk, int arch, int major,
+ * be written).
+ */
+void audit_syscall_entry(int arch, int major,
unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4)
{
+ struct task_struct *tsk = current;
struct audit_context *context = tsk->audit_context;
enum audit_state state;
BUG_ON(!context);
- /* This happens only on certain architectures that make system
+ /*
+ * This happens only on certain architectures that make system
* calls in kernel_thread via the entry.S interface, instead of
* with direct calls. (If you are porting to a new
* architecture, hitting this condition can indicate that you
*
* i386 no
* x86_64 no
- * ppc64 yes (see arch/ppc64/kernel/misc.S)
+ * ppc64 yes (see arch/powerpc/platforms/iseries/misc.S)
*
* This also happens with vm86 emulation in a non-nested manner
* (entries without exits), so this case must be caught.
if (context->in_syscall) {
struct audit_context *newctx;
-#if defined(__NR_vm86) && defined(__NR_vm86old)
- /* vm86 mode should only be entered once */
- if (major == __NR_vm86 || major == __NR_vm86old)
- return;
-#endif
#if AUDIT_DEBUG
printk(KERN_ERR
"audit(:%d) pid=%d in syscall=%d;"
state = context->state;
if (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT)
- state = audit_filter_syscall(tsk, context, &audit_entlist);
+ state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
if (likely(state == AUDIT_DISABLED))
return;
- context->serial = audit_serial();
+ context->serial = 0;
context->ctime = CURRENT_TIME;
context->in_syscall = 1;
context->auditable = !!(state == AUDIT_RECORD_CONTEXT);
}
-/* Tear down after system call. If the audit context has been marked as
+/**
+ * audit_syscall_exit - deallocate audit context after a system call
+ * @tsk: task being audited
+ * @valid: success/failure flag
+ * @return_code: syscall return value
+ *
+ * Tear down after system call. If the audit context has been marked as
* auditable (either because of the AUDIT_RECORD_CONTEXT state from
* filtering, or because some other part of the kernel write an audit
* message), then write out the syscall information. In call cases,
- * free the names stored from getname(). */
-void audit_syscall_exit(struct task_struct *tsk, int valid, long return_code)
+ * free the names stored from getname().
+ */
+void audit_syscall_exit(int valid, long return_code)
{
+ struct task_struct *tsk = current;
struct audit_context *context;
- get_task_struct(tsk);
- task_lock(tsk);
context = audit_get_context(tsk, valid, return_code);
- task_unlock(tsk);
- /* Not having a context here is ok, since the parent may have
- * called __put_task_struct. */
if (likely(!context))
return;
- if (context->in_syscall && context->auditable && context->pid != audit_pid)
- audit_log_exit(context);
+ if (context->in_syscall && context->auditable)
+ audit_log_exit(context, tsk);
context->in_syscall = 0;
context->auditable = 0;
} else {
audit_free_names(context);
audit_free_aux(context);
- audit_zero_context(context, context->state);
tsk->audit_context = context;
}
- put_task_struct(tsk);
}
-/* Add a name to the list. Called from fs/namei.c:getname(). */
-void audit_getname(const char *name)
+/**
+ * audit_getname - add a name to the list
+ * @name: name to add
+ *
+ * Add a name to the list of audit names for this context.
+ * Called from fs/namei.c:getname().
+ */
+void __audit_getname(const char *name)
{
struct audit_context *context = current->audit_context;
- if (!context || IS_ERR(name) || !name)
+ if (IS_ERR(name) || !name)
return;
if (!context->in_syscall) {
context->names[context->name_count].name = name;
context->names[context->name_count].ino = (unsigned long)-1;
++context->name_count;
+ if (!context->pwd) {
+ read_lock(¤t->fs->lock);
+ context->pwd = dget(current->fs->pwd);
+ context->pwdmnt = mntget(current->fs->pwdmnt);
+ read_unlock(¤t->fs->lock);
+ }
+
}
-/* Intercept a putname request. Called from
- * include/linux/fs.h:putname(). If we have stored the name from
- * getname in the audit context, then we delay the putname until syscall
- * exit. */
+/* audit_putname - intercept a putname request
+ * @name: name to intercept and delay for putname
+ *
+ * If we have stored the name from getname in the audit context,
+ * then we delay the putname until syscall exit.
+ * Called from include/linux/fs.h:putname().
+ */
void audit_putname(const char *name)
{
struct audit_context *context = current->audit_context;
for (i = 0; i < context->name_count; i++)
printk(KERN_ERR "name[%d] = %p = %s\n", i,
context->names[i].name,
- context->names[i].name);
+ context->names[i].name ?: "(null)");
}
#endif
__putname(name);
#endif
}
-/* Store the inode and device from a lookup. Called from
- * fs/namei.c:path_lookup(). */
-void audit_inode(const char *name, const struct inode *inode)
+static void audit_inode_context(int idx, const struct inode *inode)
+{
+ struct audit_context *context = current->audit_context;
+
+ selinux_get_inode_sid(inode, &context->names[idx].osid);
+}
+
+
+/**
+ * audit_inode - store the inode and device from a lookup
+ * @name: name being audited
+ * @inode: inode being audited
+ * @flags: lookup flags (as used in path_lookup())
+ *
+ * Called from fs/namei.c:path_lookup().
+ */
+void __audit_inode(const char *name, const struct inode *inode, unsigned flags)
{
int idx;
struct audit_context *context = current->audit_context;
++context->ino_count;
#endif
}
- context->names[idx].ino = inode->i_ino;
- context->names[idx].dev = inode->i_sb->s_dev;
- context->names[idx].mode = inode->i_mode;
- context->names[idx].uid = inode->i_uid;
- context->names[idx].gid = inode->i_gid;
- context->names[idx].rdev = inode->i_rdev;
+ context->names[idx].dev = inode->i_sb->s_dev;
+ context->names[idx].mode = inode->i_mode;
+ context->names[idx].uid = inode->i_uid;
+ context->names[idx].gid = inode->i_gid;
+ context->names[idx].rdev = inode->i_rdev;
+ audit_inode_context(idx, inode);
+ if ((flags & LOOKUP_PARENT) && (strcmp(name, "/") != 0) &&
+ (strcmp(name, ".") != 0)) {
+ context->names[idx].ino = (unsigned long)-1;
+ context->names[idx].pino = inode->i_ino;
+ } else {
+ context->names[idx].ino = inode->i_ino;
+ context->names[idx].pino = (unsigned long)-1;
+ }
}
-int audit_get_stamp(struct audit_context *ctx,
- struct timespec *t, unsigned int *serial)
+/**
+ * audit_inode_child - collect inode info for created/removed objects
+ * @dname: inode's dentry name
+ * @inode: inode being audited
+ * @pino: inode number of dentry parent
+ *
+ * For syscalls that create or remove filesystem objects, audit_inode
+ * can only collect information for the filesystem object's parent.
+ * This call updates the audit context with the child's information.
+ * Syscalls that create a new filesystem object must be hooked after
+ * the object is created. Syscalls that remove a filesystem object
+ * must be hooked prior, in order to capture the target inode during
+ * unsuccessful attempts.
+ */
+void __audit_inode_child(const char *dname, const struct inode *inode,
+ unsigned long pino)
{
- if (ctx) {
- t->tv_sec = ctx->ctime.tv_sec;
- t->tv_nsec = ctx->ctime.tv_nsec;
- *serial = ctx->serial;
- ctx->auditable = 1;
- return 1;
+ int idx;
+ struct audit_context *context = current->audit_context;
+
+ if (!context->in_syscall)
+ return;
+
+ /* determine matching parent */
+ if (dname)
+ for (idx = 0; idx < context->name_count; idx++)
+ if (context->names[idx].pino == pino) {
+ const char *n;
+ const char *name = context->names[idx].name;
+ int dlen = strlen(dname);
+ int nlen = name ? strlen(name) : 0;
+
+ if (nlen < dlen)
+ continue;
+
+ /* disregard trailing slashes */
+ n = name + nlen - 1;
+ while ((*n == '/') && (n > name))
+ n--;
+
+ /* find last path component */
+ n = n - dlen + 1;
+ if (n < name)
+ continue;
+ else if (n > name) {
+ if (*--n != '/')
+ continue;
+ else
+ n++;
+ }
+
+ if (strncmp(n, dname, dlen) == 0)
+ goto update_context;
+ }
+
+ /* catch-all in case match not found */
+ idx = context->name_count++;
+ context->names[idx].name = NULL;
+ context->names[idx].pino = pino;
+#if AUDIT_DEBUG
+ context->ino_count++;
+#endif
+
+update_context:
+ if (inode) {
+ context->names[idx].ino = inode->i_ino;
+ context->names[idx].dev = inode->i_sb->s_dev;
+ context->names[idx].mode = inode->i_mode;
+ context->names[idx].uid = inode->i_uid;
+ context->names[idx].gid = inode->i_gid;
+ context->names[idx].rdev = inode->i_rdev;
+ audit_inode_context(idx, inode);
}
- return 0;
}
+/**
+ * auditsc_get_stamp - get local copies of audit_context values
+ * @ctx: audit_context for the task
+ * @t: timespec to store time recorded in the audit_context
+ * @serial: serial value that is recorded in the audit_context
+ *
+ * Also sets the context as auditable.
+ */
+void auditsc_get_stamp(struct audit_context *ctx,
+ struct timespec *t, unsigned int *serial)
+{
+ if (!ctx->serial)
+ ctx->serial = audit_serial();
+ t->tv_sec = ctx->ctime.tv_sec;
+ t->tv_nsec = ctx->ctime.tv_nsec;
+ *serial = ctx->serial;
+ ctx->auditable = 1;
+}
+
+/**
+ * audit_set_loginuid - set a task's audit_context loginuid
+ * @task: task whose audit context is being modified
+ * @loginuid: loginuid value
+ *
+ * Returns 0.
+ *
+ * Called (set) from fs/proc/base.c::proc_loginuid_write().
+ */
int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
if (task->audit_context) {
struct audit_buffer *ab;
- ab = audit_log_start(NULL, AUDIT_LOGIN);
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
if (ab) {
audit_log_format(ab, "login pid=%d uid=%u "
"old auid=%u new auid=%u",
return 0;
}
+/**
+ * audit_get_loginuid - get the loginuid for an audit_context
+ * @ctx: the audit_context
+ *
+ * Returns the context's loginuid or -1 if @ctx is NULL.
+ */
uid_t audit_get_loginuid(struct audit_context *ctx)
{
return ctx ? ctx->loginuid : -1;
}
-int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
+/**
+ * __audit_mq_open - record audit data for a POSIX MQ open
+ * @oflag: open flag
+ * @mode: mode bits
+ * @u_attr: queue attributes
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr)
{
- struct audit_aux_data_ipcctl *ax;
+ struct audit_aux_data_mq_open *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (!audit_enabled)
+ return 0;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ if (u_attr != NULL) {
+ if (copy_from_user(&ax->attr, u_attr, sizeof(ax->attr))) {
+ kfree(ax);
+ return -EFAULT;
+ }
+ } else
+ memset(&ax->attr, 0, sizeof(ax->attr));
+
+ ax->oflag = oflag;
+ ax->mode = mode;
+
+ ax->d.type = AUDIT_MQ_OPEN;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * __audit_mq_timedsend - record audit data for a POSIX MQ timed send
+ * @mqdes: MQ descriptor
+ * @msg_len: Message length
+ * @msg_prio: Message priority
+ * @abs_timeout: Message timeout in absolute time
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_mq_timedsend(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
+ const struct timespec __user *u_abs_timeout)
+{
+ struct audit_aux_data_mq_sendrecv *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (!audit_enabled)
+ return 0;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ if (u_abs_timeout != NULL) {
+ if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) {
+ kfree(ax);
+ return -EFAULT;
+ }
+ } else
+ memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout));
+
+ ax->mqdes = mqdes;
+ ax->msg_len = msg_len;
+ ax->msg_prio = msg_prio;
+
+ ax->d.type = AUDIT_MQ_SENDRECV;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * __audit_mq_timedreceive - record audit data for a POSIX MQ timed receive
+ * @mqdes: MQ descriptor
+ * @msg_len: Message length
+ * @msg_prio: Message priority
+ * @abs_timeout: Message timeout in absolute time
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_mq_timedreceive(mqd_t mqdes, size_t msg_len,
+ unsigned int __user *u_msg_prio,
+ const struct timespec __user *u_abs_timeout)
+{
+ struct audit_aux_data_mq_sendrecv *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (!audit_enabled)
+ return 0;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ if (u_msg_prio != NULL) {
+ if (get_user(ax->msg_prio, u_msg_prio)) {
+ kfree(ax);
+ return -EFAULT;
+ }
+ } else
+ ax->msg_prio = 0;
+
+ if (u_abs_timeout != NULL) {
+ if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) {
+ kfree(ax);
+ return -EFAULT;
+ }
+ } else
+ memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout));
+
+ ax->mqdes = mqdes;
+ ax->msg_len = msg_len;
+
+ ax->d.type = AUDIT_MQ_SENDRECV;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * __audit_mq_notify - record audit data for a POSIX MQ notify
+ * @mqdes: MQ descriptor
+ * @u_notification: Notification event
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+
+int __audit_mq_notify(mqd_t mqdes, const struct sigevent __user *u_notification)
+{
+ struct audit_aux_data_mq_notify *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (!audit_enabled)
+ return 0;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ if (u_notification != NULL) {
+ if (copy_from_user(&ax->notification, u_notification, sizeof(ax->notification))) {
+ kfree(ax);
+ return -EFAULT;
+ }
+ } else
+ memset(&ax->notification, 0, sizeof(ax->notification));
+
+ ax->mqdes = mqdes;
+
+ ax->d.type = AUDIT_MQ_NOTIFY;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
+ * @mqdes: MQ descriptor
+ * @mqstat: MQ flags
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
+{
+ struct audit_aux_data_mq_getsetattr *ax;
struct audit_context *context = current->audit_context;
+ if (!audit_enabled)
+ return 0;
+
if (likely(!context))
return 0;
- ax = kmalloc(sizeof(*ax), GFP_KERNEL);
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->mqdes = mqdes;
+ ax->mqstat = *mqstat;
+
+ ax->d.type = AUDIT_MQ_GETSETATTR;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * audit_ipc_obj - record audit data for ipc object
+ * @ipcp: ipc permissions
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_ipc_obj(struct kern_ipc_perm *ipcp)
+{
+ struct audit_aux_data_ipcctl *ax;
+ struct audit_context *context = current->audit_context;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->uid = ipcp->uid;
+ ax->gid = ipcp->gid;
+ ax->mode = ipcp->mode;
+ selinux_get_ipc_sid(ipcp, &ax->osid);
+
+ ax->d.type = AUDIT_IPC;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+/**
+ * audit_ipc_set_perm - record audit data for new ipc permissions
+ * @qbytes: msgq bytes
+ * @uid: msgq user id
+ * @gid: msgq group id
+ * @mode: msgq mode (permissions)
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
+{
+ struct audit_aux_data_ipcctl *ax;
+ struct audit_context *context = current->audit_context;
+
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
if (!ax)
return -ENOMEM;
ax->gid = gid;
ax->mode = mode;
- ax->d.type = AUDIT_IPC;
+ ax->d.type = AUDIT_IPC_SET_PERM;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+int audit_bprm(struct linux_binprm *bprm)
+{
+ struct audit_aux_data_execve *ax;
+ struct audit_context *context = current->audit_context;
+ unsigned long p, next;
+ void *to;
+
+ if (likely(!audit_enabled || !context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
+ GFP_KERNEL);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->argc = bprm->argc;
+ ax->envc = bprm->envc;
+ for (p = bprm->p, to = ax->mem; p < MAX_ARG_PAGES*PAGE_SIZE; p = next) {
+ struct page *page = bprm->page[p / PAGE_SIZE];
+ void *kaddr = kmap(page);
+ next = (p + PAGE_SIZE) & ~(PAGE_SIZE - 1);
+ memcpy(to, kaddr + (p & (PAGE_SIZE - 1)), next - p);
+ to += next - p;
+ kunmap(page);
+ }
+
+ ax->d.type = AUDIT_EXECVE;
ax->d.next = context->aux;
context->aux = (void *)ax;
return 0;
}
+
+/**
+ * audit_socketcall - record audit data for sys_socketcall
+ * @nargs: number of args
+ * @args: args array
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
int audit_socketcall(int nargs, unsigned long *args)
{
struct audit_aux_data_socketcall *ax;
return 0;
}
+/**
+ * audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
+ * @len: data length in user space
+ * @a: data address in kernel space
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
int audit_sockaddr(int len, void *a)
{
struct audit_aux_data_sockaddr *ax;
return 0;
}
+/**
+ * audit_avc_path - record the granting or denial of permissions
+ * @dentry: dentry to record
+ * @mnt: mnt to record
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ *
+ * Called from security/selinux/avc.c::avc_audit()
+ */
int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt)
{
struct audit_aux_data_path *ax;
return 0;
}
-void audit_signal_info(int sig, struct task_struct *t)
+/**
+ * audit_signal_info - record signal info for shutting down audit subsystem
+ * @sig: signal value
+ * @t: task being signaled
+ *
+ * If the audit subsystem is being terminated, record the task (pid)
+ * and uid that is doing that.
+ */
+void __audit_signal_info(int sig, struct task_struct *t)
{
extern pid_t audit_sig_pid;
extern uid_t audit_sig_uid;
-
- if (unlikely(audit_pid && t->pid == audit_pid)) {
- if (sig == SIGTERM || sig == SIGHUP) {
- struct audit_context *ctx = current->audit_context;
- audit_sig_pid = current->pid;
- if (ctx)
- audit_sig_uid = ctx->loginuid;
- else
- audit_sig_uid = current->uid;
- }
+ extern u32 audit_sig_sid;
+
+ if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
+ struct task_struct *tsk = current;
+ struct audit_context *ctx = tsk->audit_context;
+ audit_sig_pid = tsk->pid;
+ if (ctx)
+ audit_sig_uid = ctx->loginuid;
+ else
+ audit_sig_uid = tsk->uid;
+ selinux_get_task_sid(tsk, &audit_sig_sid);
}
}
-
Code Review / linux-2.6.git / blobdiff