*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
* Copyright 2005 Hewlett-Packard Development Company, L.P.
- * Copyright (C) 2005, 2006 IBM Corporation
+ * Copyright (C) 2005 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.
*
#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/list.h>
#include <linux/tty.h>
#include <linux/selinux.h>
-#include <linux/binfmts.h>
-#include <linux/syscalls.h>
#include "audit.h"
* path_lookup. */
#define AUDIT_NAMES_RESERVED 7
-/* Indicates that audit should log the full pathname. */
-#define AUDIT_NAME_FULL -1
-
-/* number of audit rules */
-int audit_n_rules;
-
/* 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).
* Further, in fs/namei.c:path_lookup() we store the inode and device. */
struct audit_names {
const char *name;
- int name_len; /* number of name's characters to log */
- unsigned name_put; /* call __putname() for this name */
unsigned long ino;
+ unsigned long pino;
dev_t dev;
umode_t mode;
uid_t uid;
#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;
u32 osid;
};
-struct audit_aux_data_execve {
- struct audit_aux_data d;
- int argc;
- int envc;
- char mem[0];
-};
-
struct audit_aux_data_socketcall {
struct audit_aux_data d;
int nargs;
/* The per-task audit context. */
struct audit_context {
- int dummy; /* must be the first element */
int in_syscall; /* 1 if task is in a syscall */
enum audit_state state;
unsigned int serial; /* serial number for record */
int auditable; /* 1 if record should be written */
int name_count;
struct audit_names names[AUDIT_NAMES];
- char * filterkey; /* key for rule that triggered record */
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, ppid;
+ pid_t pid;
uid_t uid, euid, suid, fsuid;
gid_t gid, egid, sgid, fsgid;
unsigned long personality;
#endif
};
-#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
-static inline int open_arg(int flags, int mask)
-{
- int n = ACC_MODE(flags);
- if (flags & (O_TRUNC | O_CREAT))
- n |= AUDIT_PERM_WRITE;
- return n & mask;
-}
-
-static int audit_match_perm(struct audit_context *ctx, int mask)
-{
- unsigned n = ctx->major;
- switch (audit_classify_syscall(ctx->arch, n)) {
- case 0: /* native */
- if ((mask & AUDIT_PERM_WRITE) &&
- audit_match_class(AUDIT_CLASS_WRITE, n))
- return 1;
- if ((mask & AUDIT_PERM_READ) &&
- audit_match_class(AUDIT_CLASS_READ, n))
- return 1;
- if ((mask & AUDIT_PERM_ATTR) &&
- audit_match_class(AUDIT_CLASS_CHATTR, n))
- return 1;
- return 0;
- case 1: /* 32bit on biarch */
- if ((mask & AUDIT_PERM_WRITE) &&
- audit_match_class(AUDIT_CLASS_WRITE_32, n))
- return 1;
- if ((mask & AUDIT_PERM_READ) &&
- audit_match_class(AUDIT_CLASS_READ_32, n))
- return 1;
- if ((mask & AUDIT_PERM_ATTR) &&
- audit_match_class(AUDIT_CLASS_CHATTR_32, n))
- return 1;
- return 0;
- case 2: /* open */
- return mask & ACC_MODE(ctx->argv[1]);
- case 3: /* openat */
- return mask & ACC_MODE(ctx->argv[2]);
- case 4: /* socketcall */
- return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
- case 5: /* execve */
- return mask & AUDIT_PERM_EXEC;
- default:
- return 0;
- }
-}
-/* Determine if any context name data matches a rule's watch data */
/* 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_krule *rule,
struct audit_context *ctx,
- struct audit_names *name,
enum audit_state *state)
{
int i, j, need_sid = 1;
case AUDIT_PID:
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 = audit_comparator(tsk->uid, f->op, f->val);
break;
}
break;
case AUDIT_DEVMAJOR:
- if (name)
- result = audit_comparator(MAJOR(name->dev),
- f->op, f->val);
- else if (ctx) {
+ if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
if (audit_comparator(MAJOR(ctx->names[j].dev), f->op, f->val)) {
++result;
}
break;
case AUDIT_DEVMINOR:
- if (name)
- result = audit_comparator(MINOR(name->dev),
- f->op, f->val);
- else if (ctx) {
+ if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
if (audit_comparator(MINOR(ctx->names[j].dev), f->op, f->val)) {
++result;
}
break;
case AUDIT_INODE:
- if (name)
- result = (name->ino == f->val);
- else if (ctx) {
+ if (ctx) {
for (j = 0; j < ctx->name_count; j++) {
- if (audit_comparator(ctx->names[j].ino, f->op, f->val)) {
+ if (audit_comparator(ctx->names[j].ino, f->op, f->val) ||
+ audit_comparator(ctx->names[j].pino, f->op, f->val)) {
++result;
break;
}
}
}
break;
- case AUDIT_WATCH:
- if (name && rule->watch->ino != (unsigned long)-1)
- result = (name->dev == rule->watch->dev &&
- name->ino == rule->watch->ino);
- break;
case AUDIT_LOGINUID:
result = 0;
if (ctx)
result = audit_comparator(ctx->loginuid, f->op, f->val);
break;
- case AUDIT_SUBJ_USER:
- case AUDIT_SUBJ_ROLE:
- case AUDIT_SUBJ_TYPE:
- case AUDIT_SUBJ_SEN:
- case AUDIT_SUBJ_CLR:
+ 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
ctx);
}
break;
- case AUDIT_OBJ_USER:
- case AUDIT_OBJ_ROLE:
- case AUDIT_OBJ_TYPE:
- case AUDIT_OBJ_LEV_LOW:
- case AUDIT_OBJ_LEV_HIGH:
- /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
- also applies here */
- if (f->se_rule) {
- /* Find files that match */
- if (name) {
- result = selinux_audit_rule_match(
- name->osid, f->type, f->op,
- f->se_rule, ctx);
- } else if (ctx) {
- for (j = 0; j < ctx->name_count; j++) {
- if (selinux_audit_rule_match(
- ctx->names[j].osid,
- f->type, f->op,
- f->se_rule, ctx)) {
- ++result;
- break;
- }
- }
- }
- /* Find ipc objects that match */
- if (ctx) {
- struct audit_aux_data *aux;
- for (aux = ctx->aux; aux;
- aux = aux->next) {
- if (aux->type == AUDIT_IPC) {
- struct audit_aux_data_ipcctl *axi = (void *)aux;
- if (selinux_audit_rule_match(axi->osid, f->type, f->op, f->se_rule, ctx)) {
- ++result;
- break;
- }
- }
- }
- }
- }
- break;
case AUDIT_ARG0:
case AUDIT_ARG1:
case AUDIT_ARG2:
if (ctx)
result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
break;
- case AUDIT_FILTERKEY:
- /* ignore this field for filtering */
- result = 1;
- break;
- case AUDIT_PERM:
- result = audit_match_perm(ctx, f->val);
- break;
}
if (!result)
return 0;
}
- if (rule->filterkey)
- ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
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;
rcu_read_lock();
list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
- if (audit_filter_rules(tsk, &e->rule, NULL, NULL, &state)) {
+ if (audit_filter_rules(tsk, &e->rule, NULL, &state)) {
rcu_read_unlock();
return state;
}
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, NULL,
- &state)) {
+ if ((e->rule.mask[word] & bit) == bit
+ && audit_filter_rules(tsk, &e->rule, ctx, &state)) {
rcu_read_unlock();
return state;
}
return AUDIT_BUILD_CONTEXT;
}
-/* At syscall exit time, this filter is called if any audit_names[] have been
- * collected during syscall processing. We only check rules in sublists at hash
- * buckets applicable to the inode numbers in audit_names[].
- * Regarding audit_state, same rules apply as for audit_filter_syscall().
- */
-enum audit_state audit_filter_inodes(struct task_struct *tsk,
- struct audit_context *ctx)
-{
- int i;
- struct audit_entry *e;
- enum audit_state state;
-
- if (audit_pid && tsk->tgid == audit_pid)
- return AUDIT_DISABLED;
-
- rcu_read_lock();
- for (i = 0; i < ctx->name_count; i++) {
- int word = AUDIT_WORD(ctx->major);
- int bit = AUDIT_BIT(ctx->major);
- struct audit_names *n = &ctx->names[i];
- int h = audit_hash_ino((u32)n->ino);
- struct list_head *list = &audit_inode_hash[h];
-
- if (list_empty(list))
- continue;
-
- list_for_each_entry_rcu(e, list, list) {
- if ((e->rule.mask[word] & bit) == bit &&
- audit_filter_rules(tsk, &e->rule, ctx, n, &state)) {
- rcu_read_unlock();
- return state;
- }
- }
- }
- rcu_read_unlock();
- return AUDIT_BUILD_CONTEXT;
-}
-
-void audit_set_auditable(struct audit_context *ctx)
-{
- ctx->auditable = 1;
-}
-
static inline struct audit_context *audit_get_context(struct task_struct *tsk,
int return_valid,
int return_code)
context->return_valid = return_valid;
context->return_code = return_code;
- if (context->in_syscall && !context->dummy && !context->auditable) {
+ if (context->in_syscall && !context->auditable) {
enum audit_state state;
-
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
- if (state == AUDIT_RECORD_CONTEXT) {
- context->auditable = 1;
- goto get_context;
- }
-
- state = audit_filter_inodes(tsk, context);
if (state == AUDIT_RECORD_CONTEXT)
context->auditable = 1;
-
}
-get_context:
-
+ context->pid = tsk->pid;
+ context->uid = tsk->uid;
+ context->gid = tsk->gid;
+ context->euid = tsk->euid;
+ context->suid = tsk->suid;
+ context->fsuid = tsk->fsuid;
+ context->egid = tsk->egid;
+ context->sgid = tsk->sgid;
+ context->fsgid = tsk->fsgid;
+ context->personality = tsk->personality;
tsk->audit_context = NULL;
return context;
}
#endif
for (i = 0; i < context->name_count; i++) {
- if (context->names[i].name && context->names[i].name_put)
+ if (context->names[i].name)
__putname(context->names[i].name);
}
context->name_count = 0;
}
audit_free_names(context);
audit_free_aux(context);
- kfree(context->filterkey);
kfree(context);
context = previous;
} while (context);
return;
error_path:
- kfree(ctx);
+ if (ctx)
+ kfree(ctx);
audit_panic("error in audit_log_task_context");
return;
}
const char *tty;
/* tsk == current */
- 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;
- context->suid = tsk->suid;
- context->fsuid = tsk->fsuid;
- context->egid = tsk->egid;
- context->sgid = tsk->sgid;
- context->fsgid = tsk->fsgid;
- context->personality = tsk->personality;
ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
if (!ab)
audit_log_format(ab, " success=%s exit=%ld",
(context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
context->return_code);
-
- mutex_lock(&tty_mutex);
- read_lock(&tasklist_lock);
if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
tty = tsk->signal->tty->name;
else
tty = "(none)";
- read_unlock(&tasklist_lock);
audit_log_format(ab,
" a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
- " ppid=%d pid=%d auid=%u uid=%u gid=%u"
+ " pid=%d auid=%u uid=%u gid=%u"
" euid=%u suid=%u fsuid=%u"
" egid=%u sgid=%u fsgid=%u tty=%s",
context->argv[0],
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, tty);
-
- mutex_unlock(&tty_mutex);
-
audit_log_task_info(ab, tsk);
- if (context->filterkey) {
- audit_log_format(ab, " key=");
- audit_log_untrustedstring(ab, context->filterkey);
- } else
- audit_log_format(ab, " key=(null)");
audit_log_end(ab);
for (aux = context->aux; aux; aux = aux->next) {
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,
- "ouid=%u ogid=%u mode=%x",
- axi->uid, axi->gid, axi->mode);
+ " qbytes=%lx iuid=%u igid=%u mode=%x",
+ axi->qbytes, axi->uid, axi->gid, axi->mode);
if (axi->osid != 0) {
char *ctx = NULL;
u32 len;
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",
+ " new qbytes=%lx new iuid=%u new igid=%u new 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");
+ 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; }
}
}
for (i = 0; i < context->name_count; i++) {
- struct audit_names *n = &context->names[i];
+ 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)
audit_log_format(ab, "item=%d", i);
- if (n->name) {
- switch(n->name_len) {
- case AUDIT_NAME_FULL:
- /* log the full path */
- audit_log_format(ab, " name=");
- audit_log_untrustedstring(ab, n->name);
- break;
- case 0:
- /* name was specified as a relative path and the
- * directory component is the cwd */
- audit_log_d_path(ab, " name=", context->pwd,
- context->pwdmnt);
- break;
- default:
- /* log the name's directory component */
- audit_log_format(ab, " name=");
- audit_log_n_untrustedstring(ab, n->name_len,
- n->name);
- }
- } else
- audit_log_format(ab, " name=(null)");
-
- if (n->ino != (unsigned long)-1) {
- audit_log_format(ab, " inode=%lu"
- " dev=%02x:%02x mode=%#o"
- " ouid=%u ogid=%u rdev=%02x:%02x",
- n->ino,
- MAJOR(n->dev),
- MINOR(n->dev),
- n->mode,
- n->uid,
- n->gid,
- MAJOR(n->rdev),
- MINOR(n->rdev));
- }
- if (n->osid != 0) {
+ audit_log_format(ab, " name=");
+ if (context->names[i].name)
+ audit_log_untrustedstring(ab, context->names[i].name);
+ 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(
- n->osid, &ctx, &len)) {
- audit_log_format(ab, " osid=%u", n->osid);
+ 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);
context->argv[3] = a4;
state = context->state;
- context->dummy = !audit_n_rules;
- if (!context->dummy && (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT))
+ if (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT)
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
if (likely(state == AUDIT_DISABLED))
return;
} else {
audit_free_names(context);
audit_free_aux(context);
- kfree(context->filterkey);
- context->filterkey = NULL;
tsk->audit_context = context;
}
}
* Add a name to the list of audit names for this context.
* Called from fs/namei.c:getname().
*/
-void __audit_getname(const char *name)
+void audit_getname(const char *name)
{
struct audit_context *context = current->audit_context;
- if (IS_ERR(name) || !name)
+ if (!context || IS_ERR(name) || !name)
return;
if (!context->in_syscall) {
}
BUG_ON(context->name_count >= AUDIT_NAMES);
context->names[context->name_count].name = name;
- context->names[context->name_count].name_len = AUDIT_NAME_FULL;
- context->names[context->name_count].name_put = 1;
context->names[context->name_count].ino = (unsigned long)-1;
++context->name_count;
if (!context->pwd) {
#endif
}
-/* Copy inode data into an audit_names. */
-static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
+static void audit_inode_context(int idx, const struct inode *inode)
{
- name->ino = inode->i_ino;
- name->dev = inode->i_sb->s_dev;
- name->mode = inode->i_mode;
- name->uid = inode->i_uid;
- name->gid = inode->i_gid;
- name->rdev = inode->i_rdev;
- selinux_get_inode_sid(inode, &name->osid);
+ 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)
+void __audit_inode(const char *name, const struct inode *inode, unsigned flags)
{
int idx;
struct audit_context *context = current->audit_context;
* associated name? */
if (context->name_count >= AUDIT_NAMES - AUDIT_NAMES_RESERVED)
return;
- idx = context->name_count;
- if (context->name_count == (AUDIT_NAMES - 1)) {
- printk(KERN_DEBUG
- "name_count maxed and losing entry [%d]=%s\n",
- context->name_count,
- context->names[context->name_count].name ?:
- "(null)");
- } else
- context->name_count++;
+ idx = context->name_count++;
context->names[idx].name = NULL;
#if AUDIT_DEBUG
++context->ino_count;
#endif
}
- audit_copy_inode(&context->names[idx], inode);
+ 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;
+ }
}
/**
* audit_inode_child - collect inode info for created/removed objects
* @dname: inode's dentry name
* @inode: inode being audited
- * @parent: inode of dentry parent
+ * @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.
* unsuccessful attempts.
*/
void __audit_inode_child(const char *dname, const struct inode *inode,
- const struct inode *parent)
+ unsigned long pino)
{
int idx;
struct audit_context *context = current->audit_context;
- const char *found_name = NULL;
- int dirlen = 0;
if (!context->in_syscall)
return;
/* determine matching parent */
- if (!dname)
- goto update_context;
- for (idx = 0; idx < context->name_count; idx++)
- if (context->names[idx].ino == parent->i_ino) {
- const char *name = context->names[idx].name;
-
- if (!name)
- continue;
-
- if (audit_compare_dname_path(dname, name, &dirlen) == 0) {
- context->names[idx].name_len = dirlen;
- found_name = name;
- break;
+ 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;
}
- }
-update_context:
- idx = context->name_count;
- if (context->name_count == (AUDIT_NAMES - 1)) {
- printk(KERN_DEBUG "name_count maxed and losing entry [%d]=%s\n",
- context->name_count,
- context->names[context->name_count].name ?: "(null)");
- } else
- context->name_count++;
+ /* 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
- /* Re-use the name belonging to the slot for a matching parent directory.
- * All names for this context are relinquished in audit_free_names() */
- context->names[idx].name = found_name;
- context->names[idx].name_len = AUDIT_NAME_FULL;
- context->names[idx].name_put = 0; /* don't call __putname() */
-
- if (!inode)
- context->names[idx].ino = (unsigned long)-1;
- else
- audit_copy_inode(&context->names[idx], inode);
-
- /* A parent was not found in audit_names, so copy the inode data for the
- * provided parent. */
- if (!found_name) {
- idx = context->name_count;
- if (context->name_count == (AUDIT_NAMES - 1)) {
- printk(KERN_DEBUG
- "name_count maxed and losing entry [%d]=%s\n",
- context->name_count,
- context->names[context->name_count].name ?:
- "(null)");
- } else
- context->name_count++;
-#if AUDIT_DEBUG
- context->ino_count++;
-#endif
- audit_copy_inode(&context->names[idx], parent);
- }
-}
-/**
- * audit_inode_update - update inode info for last collected name
- * @inode: inode being audited
- *
- * When open() is called on an existing object with the O_CREAT flag, the inode
- * data audit initially collects is incorrect. This additional hook ensures
- * audit has the inode data for the actual object to be opened.
- */
-void __audit_inode_update(const struct inode *inode)
-{
- struct audit_context *context = current->audit_context;
- int idx;
-
- if (!context->in_syscall || !inode)
- return;
-
- if (context->name_count == 0) {
- context->name_count++;
-#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);
}
- idx = context->name_count - 1;
-
- audit_copy_inode(&context->names[idx], inode);
}
-EXPORT_SYMBOL_GPL(__audit_inode_child);
-
/**
* auditsc_get_stamp - get local copies of audit_context values
* @ctx: audit_context for the task
*/
int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
- struct audit_context *context = task->audit_context;
-
- if (context) {
- /* Only log if audit is enabled */
- if (context->in_syscall) {
- struct audit_buffer *ab;
-
- 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",
- task->pid, task->uid,
- context->loginuid, loginuid);
- audit_log_end(ab);
- }
+ if (task->audit_context) {
+ struct audit_buffer *ab;
+
+ 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",
+ task->pid, task->uid,
+ task->audit_context->loginuid, loginuid);
+ audit_log_end(ab);
}
- context->loginuid = loginuid;
+ task->audit_context->loginuid = loginuid;
}
return 0;
}
return ctx ? ctx->loginuid : -1;
}
-/**
- * __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_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
- * @u_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
- * @u_msg_prio: Message priority
- * @u_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_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)
+int audit_ipc_obj(struct kern_ipc_perm *ipcp)
{
struct audit_aux_data_ipcctl *ax;
struct audit_context *context = current->audit_context;
+ if (likely(!context))
+ return 0;
+
ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
if (!ax)
return -ENOMEM;
*
* 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)
+int audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode, struct kern_ipc_perm *ipcp)
{
struct audit_aux_data_ipcctl *ax;
struct audit_context *context = current->audit_context;
+ if (likely(!context))
+ return 0;
+
ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
if (!ax)
return -ENOMEM;
ax->uid = uid;
ax->gid = gid;
ax->mode = mode;
+ selinux_get_ipc_sid(ipcp, &ax->osid);
ax->d.type = AUDIT_IPC_SET_PERM;
ax->d.next = context->aux;
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 || context->dummy))
- 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
struct audit_aux_data_socketcall *ax;
struct audit_context *context = current->audit_context;
- if (likely(!context || context->dummy))
+ if (likely(!context))
return 0;
ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
struct audit_aux_data_sockaddr *ax;
struct audit_context *context = current->audit_context;
- if (likely(!context || context->dummy))
+ if (likely(!context))
return 0;
ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);
* 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)
+void audit_signal_info(int sig, struct task_struct *t)
{
extern pid_t audit_sig_pid;
extern uid_t audit_sig_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);
+
+ if (unlikely(audit_pid && t->tgid == 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;
+ }
}
}