#include <linux/syscalls.h>
#include <linux/inotify.h>
#include <linux/capability.h>
+#include <linux/fs_struct.h>
#include "audit.h"
/* Number of target pids per aux struct. */
#define AUDIT_AUX_PIDS 16
-struct audit_aux_data_mq_open {
- struct audit_aux_data d;
- int oflag;
- mode_t mode;
- struct mq_attr attr;
-};
-
struct audit_aux_data_execve {
struct audit_aux_data d;
int argc;
struct mm_struct *mm;
};
-struct audit_aux_data_fd_pair {
- struct audit_aux_data d;
- int fd[2];
-};
-
struct audit_aux_data_pids {
struct audit_aux_data d;
pid_t target_pid[AUDIT_AUX_PIDS];
struct audit_context {
int dummy; /* must be the first element */
int in_syscall; /* 1 if task is in a syscall */
- enum audit_state state;
+ enum audit_state state, current_state;
unsigned int serial; /* serial number for record */
- struct timespec ctime; /* time of syscall entry */
int major; /* syscall number */
+ struct timespec ctime; /* time of syscall entry */
unsigned long argv[4]; /* syscall arguments */
- int return_valid; /* return code is valid */
long return_code;/* syscall return code */
- int auditable; /* 1 if record should be written */
+ u64 prio;
+ int return_valid; /* return code is valid */
int name_count;
struct audit_names names[AUDIT_NAMES];
char * filterkey; /* key for rule that triggered record */
char target_comm[TASK_COMM_LEN];
struct audit_tree_refs *trees, *first_trees;
+ struct list_head killed_trees;
int tree_count;
int type;
unsigned int msg_prio;
struct timespec abs_timeout;
} mq_sendrecv;
+ struct {
+ int oflag;
+ mode_t mode;
+ struct mq_attr attr;
+ } mq_open;
+ struct {
+ pid_t pid;
+ struct audit_cap_data cap;
+ } capset;
};
+ int fds[2];
#if AUDIT_DEBUG
int put_count;
#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);
*/
#ifdef CONFIG_AUDIT_TREE
+static void audit_set_auditable(struct audit_context *ctx)
+{
+ if (!ctx->prio) {
+ ctx->prio = 1;
+ ctx->current_state = AUDIT_RECORD_CONTEXT;
+ }
+}
+
static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
{
struct audit_tree_refs *p = ctx->trees;
}
break;
case AUDIT_WATCH:
- if (name && rule->watch->ino != (unsigned long)-1)
- result = (name->dev == rule->watch->dev &&
- name->ino == rule->watch->ino);
+ if (name && audit_watch_inode(rule->watch) != (unsigned long)-1)
+ result = (name->dev == audit_watch_dev(rule->watch) &&
+ name->ino == audit_watch_inode(rule->watch));
break;
case AUDIT_DIR:
if (ctx)
return 0;
}
}
- if (rule->filterkey && ctx)
- ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
+
+ if (ctx) {
+ if (rule->prio <= ctx->prio)
+ return 0;
+ if (rule->filterkey) {
+ kfree(ctx->filterkey);
+ ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
+ }
+ ctx->prio = rule->prio;
+ }
switch (rule->action) {
case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break;
* completely disabled for this task. Since we only have the task
* structure at this point, we can only check uid and gid.
*/
-static enum audit_state audit_filter_task(struct task_struct *tsk)
+static enum audit_state audit_filter_task(struct task_struct *tsk, char **key)
{
struct audit_entry *e;
enum audit_state state;
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 (state == AUDIT_RECORD_CONTEXT)
+ *key = kstrdup(e->rule.filterkey, GFP_ATOMIC);
rcu_read_unlock();
return state;
}
audit_filter_rules(tsk, &e->rule, ctx, NULL,
&state)) {
rcu_read_unlock();
+ ctx->current_state = state;
return state;
}
}
* 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)
+void 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;
+ return;
rcu_read_lock();
for (i = 0; i < ctx->name_count; i++) {
if ((e->rule.mask[word] & bit) == bit &&
audit_filter_rules(tsk, &e->rule, ctx, n, &state)) {
rcu_read_unlock();
- return state;
+ ctx->current_state = state;
+ return;
}
}
}
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)
+ long return_code)
{
struct audit_context *context = tsk->audit_context;
else
context->return_code = return_code;
- if (context->in_syscall && !context->dummy && !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;
-
+ if (context->in_syscall && !context->dummy) {
+ audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
+ audit_filter_inodes(tsk, context);
}
-get_context:
-
tsk->audit_context = NULL;
return context;
}
int i;
#if AUDIT_DEBUG == 2
- if (context->auditable
- ||context->put_count + context->ino_count != context->name_count) {
+ if (context->put_count + context->ino_count != context->name_count) {
printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d"
" name_count=%d put_count=%d"
" ino_count=%d [NOT freeing]\n",
{
memset(context, 0, sizeof(*context));
context->state = state;
+ context->prio = state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
}
static inline struct audit_context *audit_alloc_context(enum audit_state state)
if (!(context = kmalloc(sizeof(*context), GFP_KERNEL)))
return NULL;
audit_zero_context(context, state);
+ INIT_LIST_HEAD(&context->killed_trees);
return context;
}
{
struct audit_context *context;
enum audit_state state;
+ char *key = NULL;
if (likely(!audit_ever_enabled))
return 0; /* Return if not auditing. */
- state = audit_filter_task(tsk);
+ state = audit_filter_task(tsk, &key);
if (likely(state == AUDIT_DISABLED))
return 0;
if (!(context = audit_alloc_context(state))) {
+ kfree(key);
audit_log_lost("out of memory in audit_alloc");
return -ENOMEM;
}
+ context->filterkey = key;
tsk->audit_context = context;
set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
{
char arg_num_len_buf[12];
const char __user *tmp_p = p;
- /* how many digits are in arg_num? 3 is the length of a=\n */
- size_t arg_num_len = snprintf(arg_num_len_buf, 12, "%d", arg_num) + 3;
+ /* how many digits are in arg_num? 5 is the length of ' a=""' */
+ size_t arg_num_len = snprintf(arg_num_len_buf, 12, "%d", arg_num) + 5;
size_t len, len_left, to_send;
size_t max_execve_audit_len = MAX_EXECVE_AUDIT_LEN;
unsigned int i, has_cntl = 0, too_long = 0;
* so we can be sure nothing was lost.
*/
if ((i == 0) && (too_long))
- audit_log_format(*ab, "a%d_len=%zu ", arg_num,
+ audit_log_format(*ab, " a%d_len=%zu", arg_num,
has_cntl ? 2*len : len);
/*
buf[to_send] = '\0';
/* actually log it */
- audit_log_format(*ab, "a%d", arg_num);
+ audit_log_format(*ab, " a%d", arg_num);
if (too_long)
audit_log_format(*ab, "[%d]", i);
audit_log_format(*ab, "=");
if (has_cntl)
audit_log_n_hex(*ab, buf, to_send);
else
- audit_log_format(*ab, "\"%s\"", buf);
- audit_log_format(*ab, "\n");
+ audit_log_string(*ab, buf);
p += to_send;
len_left -= to_send;
p = (const char __user *)axi->mm->arg_start;
- audit_log_format(*ab, "argc=%d ", axi->argc);
+ audit_log_format(*ab, "argc=%d", axi->argc);
/*
* we need some kernel buffer to hold the userspace args. Just
return;
}
break; }
+ case AUDIT_MQ_OPEN: {
+ audit_log_format(ab,
+ "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
+ "mq_msgsize=%ld mq_curmsgs=%ld",
+ context->mq_open.oflag, context->mq_open.mode,
+ context->mq_open.attr.mq_flags,
+ context->mq_open.attr.mq_maxmsg,
+ context->mq_open.attr.mq_msgsize,
+ context->mq_open.attr.mq_curmsgs);
+ break; }
case AUDIT_MQ_SENDRECV: {
audit_log_format(ab,
"mqdes=%d msg_len=%zd msg_prio=%u "
attr->mq_flags, attr->mq_maxmsg,
attr->mq_msgsize, attr->mq_curmsgs);
break; }
+ case AUDIT_CAPSET: {
+ audit_log_format(ab, "pid=%d", context->capset.pid);
+ audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
+ audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
+ audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
+ break; }
}
audit_log_end(ab);
}
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_key(ab, context->filterkey);
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_EXECVE: {
struct audit_aux_data_execve *axi = (void *)aux;
audit_log_execve_info(context, &ab, axi);
break; }
- case AUDIT_FD_PAIR: {
- struct audit_aux_data_fd_pair *axs = (void *)aux;
- audit_log_format(ab, "fd0=%d fd1=%d", axs->fd[0], axs->fd[1]);
- break; }
-
case AUDIT_BPRM_FCAPS: {
struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
audit_log_format(ab, "fver=%x", axs->fcap_ver);
audit_log_cap(ab, "new_pe", &axs->new_pcap.effective);
break; }
- case AUDIT_CAPSET: {
- struct audit_aux_data_capset *axs = (void *)aux;
- audit_log_format(ab, "pid=%d", axs->pid);
- audit_log_cap(ab, "cap_pi", &axs->cap.inheritable);
- audit_log_cap(ab, "cap_pp", &axs->cap.permitted);
- audit_log_cap(ab, "cap_pe", &axs->cap.effective);
- break; }
-
}
audit_log_end(ab);
}
if (context->type)
show_special(context, &call_panic);
+ if (context->fds[0] >= 0) {
+ ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
+ if (ab) {
+ audit_log_format(ab, "fd0=%d fd1=%d",
+ context->fds[0], context->fds[1]);
+ audit_log_end(ab);
+ }
+ }
+
if (context->sockaddr_len) {
ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
if (ab) {
case 0:
/* name was specified as a relative path and the
* directory component is the cwd */
- audit_log_d_path(ab, " name=", &context->pwd);
+ audit_log_d_path(ab, "name=", &context->pwd);
break;
default:
/* log the name's directory component */
* 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)
+ if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
audit_log_exit(context, tsk);
+ if (!list_empty(&context->killed_trees))
+ audit_kill_trees(&context->killed_trees);
audit_free_context(context);
}
state = context->state;
context->dummy = !audit_n_rules;
- if (!context->dummy && (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT))
+ if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
+ context->prio = 0;
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
+ }
if (likely(state == AUDIT_DISABLED))
return;
context->serial = 0;
context->ctime = CURRENT_TIME;
context->in_syscall = 1;
- context->auditable = !!(state == AUDIT_RECORD_CONTEXT);
+ context->current_state = state;
context->ppid = 0;
}
{
struct audit_context *ctx = current->audit_context;
struct audit_context *p = child->audit_context;
- if (!p || !ctx || !ctx->auditable)
+ if (!p || !ctx)
+ return;
+ if (!ctx->in_syscall || ctx->current_state != AUDIT_RECORD_CONTEXT)
return;
p->arch = ctx->arch;
p->major = ctx->major;
memcpy(p->argv, ctx->argv, sizeof(ctx->argv));
p->ctime = ctx->ctime;
p->dummy = ctx->dummy;
- p->auditable = ctx->auditable;
p->in_syscall = ctx->in_syscall;
p->filterkey = kstrdup(ctx->filterkey, GFP_KERNEL);
p->ppid = current->pid;
+ p->prio = ctx->prio;
+ p->current_state = ctx->current_state;
}
/**
if (likely(!context))
return;
- if (context->in_syscall && context->auditable)
+ if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
audit_log_exit(context, tsk);
context->in_syscall = 0;
- context->auditable = 0;
+ context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
+
+ if (!list_empty(&context->killed_trees))
+ audit_kill_trees(&context->killed_trees);
if (context->previous) {
struct audit_context *new_context = context->previous;
context->target_sid = 0;
context->sockaddr_len = 0;
context->type = 0;
- kfree(context->filterkey);
- context->filterkey = NULL;
+ context->fds[0] = -1;
+ if (context->state != AUDIT_RECORD_CONTEXT) {
+ kfree(context->filterkey);
+ context->filterkey = NULL;
+ }
tsk->audit_context = context;
}
}
t->tv_sec = ctx->ctime.tv_sec;
t->tv_nsec = ctx->ctime.tv_nsec;
*serial = ctx->serial;
- ctx->auditable = 1;
+ if (!ctx->prio) {
+ ctx->prio = 1;
+ ctx->current_state = AUDIT_RECORD_CONTEXT;
+ }
return 1;
}
* __audit_mq_open - record audit data for a POSIX MQ open
* @oflag: open flag
* @mode: mode bits
- * @u_attr: queue attributes
+ * @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)
+void __audit_mq_open(int oflag, mode_t mode, struct mq_attr *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));
+ if (attr)
+ memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
+ else
+ memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
- ax->oflag = oflag;
- ax->mode = mode;
+ context->mq_open.oflag = oflag;
+ context->mq_open.mode = mode;
- ax->d.type = AUDIT_MQ_OPEN;
- ax->d.next = context->aux;
- context->aux = (void *)ax;
- return 0;
+ context->type = AUDIT_MQ_OPEN;
}
/**
/**
* __audit_mq_notify - record audit data for a POSIX MQ notify
* @mqdes: MQ descriptor
- * @u_notification: Notification event
+ * @notification: Notification event
*
*/
* @fd1: the first file descriptor
* @fd2: the second file descriptor
*
- * Returns 0 for success or NULL context or < 0 on error.
*/
-int __audit_fd_pair(int fd1, int fd2)
+void __audit_fd_pair(int fd1, int fd2)
{
struct audit_context *context = current->audit_context;
- struct audit_aux_data_fd_pair *ax;
-
- if (likely(!context)) {
- return 0;
- }
-
- ax = kmalloc(sizeof(*ax), GFP_KERNEL);
- if (!ax) {
- return -ENOMEM;
- }
-
- ax->fd[0] = fd1;
- ax->fd[1] = fd2;
-
- ax->d.type = AUDIT_FD_PAIR;
- ax->d.next = context->aux;
- context->aux = (void *)ax;
- return 0;
+ context->fds[0] = fd1;
+ context->fds[1] = fd2;
}
/**
* Record the aguments userspace sent to sys_capset for later printing by the
* audit system if applicable
*/
-int __audit_log_capset(pid_t pid,
+void __audit_log_capset(pid_t pid,
const struct cred *new, const struct cred *old)
{
- struct audit_aux_data_capset *ax;
struct audit_context *context = current->audit_context;
-
- if (likely(!audit_enabled || !context || context->dummy))
- return 0;
-
- ax = kmalloc(sizeof(*ax), GFP_KERNEL);
- if (!ax)
- return -ENOMEM;
-
- ax->d.type = AUDIT_CAPSET;
- ax->d.next = context->aux;
- context->aux = (void *)ax;
-
- ax->pid = pid;
- ax->cap.effective = new->cap_effective;
- ax->cap.inheritable = new->cap_effective;
- ax->cap.permitted = new->cap_permitted;
-
- return 0;
+ context->capset.pid = pid;
+ context->capset.cap.effective = new->cap_effective;
+ context->capset.cap.inheritable = new->cap_effective;
+ context->capset.cap.permitted = new->cap_permitted;
+ context->type = AUDIT_CAPSET;
}
/**
audit_log_format(ab, " sig=%ld", signr);
audit_log_end(ab);
}
+
+struct list_head *audit_killed_trees(void)
+{
+ struct audit_context *ctx = current->audit_context;
+ if (likely(!ctx || !ctx->in_syscall))
+ return NULL;
+ return &ctx->killed_trees;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff