-/* auditsc.c -- System-call auditing support -*- linux-c -*-
+/* auditsc.c -- System-call auditing support
* Handles all system-call specific auditing features.
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
#include <asm/types.h>
#include <linux/mm.h>
#include <linux/module.h>
-
+#include <linux/socket.h>
#include <linux/audit.h>
#include <linux/personality.h>
#include <linux/time.h>
mode_t mode;
};
+struct audit_aux_data_socketcall {
+ struct audit_aux_data d;
+ int nargs;
+ unsigned long args[0];
+};
+
+struct audit_aux_data_sockaddr {
+ struct audit_aux_data d;
+ int len;
+ char a[0];
+};
+
/* The per-task audit context. */
struct audit_context {
return -EFAULT; /* No matching rule */
}
-#ifdef CONFIG_NET
/* 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)
return 0;
}
-int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
+int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
+ uid_t loginuid)
{
u32 flags;
struct audit_entry *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;
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;
}
-#endif
/* Compare a task_struct with an audit_rule. Return 1 on match, 0
* otherwise. */
/* 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 and audit
+ * 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).
*/
static enum audit_state audit_filter_syscall(struct task_struct *tsk,
int i;
struct audit_buffer *ab;
- ab = audit_log_start(context);
+ ab = audit_log_start(context, AUDIT_SYSCALL);
if (!ab)
return; /* audit_panic has been called */
audit_log_format(ab, "syscall=%d", context->major);
while (context->aux) {
struct audit_aux_data *aux;
- ab = audit_log_start(context);
+ aux = context->aux;
+
+ ab = audit_log_start(context, aux->type);
if (!ab)
continue; /* audit_panic has been called */
- aux = context->aux;
- context->aux = aux->next;
-
- audit_log_format(ab, "auxitem=%d", aux->type);
switch (aux->type) {
- case AUDIT_AUX_IPCPERM: {
+ case AUDIT_IPC: {
struct audit_aux_data_ipcctl *axi = (void *)aux;
audit_log_format(ab,
- " qbytes=%lx uid=%d gid=%d mode=%x",
+ " qbytes=%lx iuid=%d igid=%d mode=%x",
axi->qbytes, axi->uid, axi->gid, axi->mode);
- }
+ break; }
+
+ case AUDIT_SOCKETCALL: {
+ int i;
+ struct audit_aux_data_socketcall *axs = (void *)aux;
+ audit_log_format(ab, "nargs=%d", axs->nargs);
+ for (i=0; i<axs->nargs; i++)
+ audit_log_format(ab, " a%d=%lx", i, axs->args[i]);
+ break; }
+
+ case AUDIT_SOCKADDR: {
+ struct audit_aux_data_sockaddr *axs = (void *)aux;
+
+ audit_log_format(ab, "saddr=");
+ audit_log_hex(ab, axs->a, axs->len);
+ break; }
}
audit_log_end(ab);
+
+ context->aux = aux->next;
kfree(aux);
}
for (i = 0; i < context->name_count; i++) {
- ab = audit_log_start(context);
+ ab = audit_log_start(context, AUDIT_PATH);
if (!ab)
continue; /* audit_panic has been called */
audit_log_format(ab, "item=%d", i);
}
if (context->names[i].ino != (unsigned long)-1)
audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#o"
- " uid=%d gid=%d rdev=%02x:%02x",
+ " ouid=%d ogid=%d rdev=%02x:%02x",
context->names[i].ino,
MAJOR(context->names[i].dev),
MINOR(context->names[i].dev),
/* 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 daemon to
+ * 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.
context->names[idx].rdev = inode->i_rdev;
}
-void audit_get_stamp(struct audit_context *ctx,
+int audit_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
if (ctx) {
t->tv_nsec = ctx->ctime.tv_nsec;
*serial = ctx->serial;
ctx->auditable = 1;
- } else {
- *t = CURRENT_TIME;
- *serial = 0;
+ return 1;
}
+ return 0;
}
-extern int audit_set_type(struct audit_buffer *ab, int type);
-
-int audit_set_loginuid(struct audit_context *ctx, uid_t loginuid)
+int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
- if (ctx) {
+ if (task->audit_context) {
struct audit_buffer *ab;
- ab = audit_log_start(NULL);
+ ab = audit_log_start(NULL, AUDIT_LOGIN);
if (ab) {
audit_log_format(ab, "login pid=%d uid=%u "
"old loginuid=%u new loginuid=%u",
- ctx->pid, ctx->uid, ctx->loginuid, loginuid);
- audit_set_type(ab, AUDIT_LOGIN);
+ task->pid, task->uid,
+ task->audit_context->loginuid, loginuid);
audit_log_end(ab);
}
- ctx->loginuid = loginuid;
+ task->audit_context->loginuid = loginuid;
}
return 0;
}
ax->gid = gid;
ax->mode = mode;
- ax->d.type = AUDIT_AUX_IPCPERM;
+ ax->d.type = AUDIT_IPC;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+int audit_socketcall(int nargs, unsigned long *args)
+{
+ struct audit_aux_data_socketcall *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->nargs = nargs;
+ memcpy(ax->args, args, nargs * sizeof(unsigned long));
+
+ ax->d.type = AUDIT_SOCKETCALL;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+int audit_sockaddr(int len, void *a)
+{
+ struct audit_aux_data_sockaddr *ax;
+ struct audit_context *context = current->audit_context;
+
+ if (likely(!context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->len = len;
+ memcpy(ax->a, a, len);
+
+ ax->d.type = AUDIT_SOCKADDR;
ax->d.next = context->aux;
context->aux = (void *)ax;
return 0;
}
+
+void audit_signal_info(int sig, struct task_struct *t)
+{
+ extern pid_t audit_sig_pid;
+ extern uid_t audit_sig_uid;
+ extern int audit_pid;
+
+ 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;
+ }
+ }
+}
+
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