[AUDIT] add session id to audit messages
In order to correlate audit records to an individual login add a session
id. This is incremented every time a user logs in and is included in
almost all messages which currently output the auid. The field is
labeled ses= or oses=
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index a222e73..4e67abb 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -178,6 +178,7 @@
pid_t target_pid[AUDIT_AUX_PIDS];
uid_t target_auid[AUDIT_AUX_PIDS];
uid_t target_uid[AUDIT_AUX_PIDS];
+ unsigned int target_sessionid[AUDIT_AUX_PIDS];
u32 target_sid[AUDIT_AUX_PIDS];
char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
int pid_count;
@@ -219,6 +220,7 @@
pid_t target_pid;
uid_t target_auid;
uid_t target_uid;
+ unsigned int target_sessionid;
u32 target_sid;
char target_comm[TASK_COMM_LEN];
@@ -936,7 +938,8 @@
}
static int audit_log_pid_context(struct audit_context *context, pid_t pid,
- uid_t auid, uid_t uid, u32 sid, char *comm)
+ uid_t auid, uid_t uid, unsigned int sessionid,
+ u32 sid, char *comm)
{
struct audit_buffer *ab;
char *s = NULL;
@@ -947,7 +950,8 @@
if (!ab)
return 1;
- audit_log_format(ab, "opid=%d oauid=%d ouid=%d", pid, auid, uid);
+ audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid, auid,
+ uid, sessionid);
if (selinux_sid_to_string(sid, &s, &len)) {
audit_log_format(ab, " obj=(none)");
rc = 1;
@@ -1056,7 +1060,7 @@
" a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
" ppid=%d pid=%d auid=%u uid=%u gid=%u"
" euid=%u suid=%u fsuid=%u"
- " egid=%u sgid=%u fsgid=%u tty=%s",
+ " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
context->argv[0],
context->argv[1],
context->argv[2],
@@ -1068,7 +1072,8 @@
context->uid,
context->gid,
context->euid, context->suid, context->fsuid,
- context->egid, context->sgid, context->fsgid, tty);
+ context->egid, context->sgid, context->fsgid, tty,
+ tsk->sessionid);
mutex_unlock(&tty_mutex);
@@ -1187,6 +1192,7 @@
if (audit_log_pid_context(context, axs->target_pid[i],
axs->target_auid[i],
axs->target_uid[i],
+ axs->target_sessionid[i],
axs->target_sid[i],
axs->target_comm[i]))
call_panic = 1;
@@ -1195,6 +1201,7 @@
if (context->target_pid &&
audit_log_pid_context(context, context->target_pid,
context->target_auid, context->target_uid,
+ context->target_sessionid,
context->target_sid, context->target_comm))
call_panic = 1;
@@ -1787,6 +1794,9 @@
ctx->auditable = 1;
}
+/* global counter which is incremented every time something logs in */
+static atomic_t session_id = ATOMIC_INIT(0);
+
/**
* audit_set_loginuid - set a task's audit_context loginuid
* @task: task whose audit context is being modified
@@ -1798,6 +1808,7 @@
*/
int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
+ unsigned int sessionid = atomic_inc_return(&session_id);
struct audit_context *context = task->audit_context;
if (context && context->in_syscall) {
@@ -1806,12 +1817,15 @@
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",
+ "old auid=%u new auid=%u"
+ " old ses=%u new ses=%u",
task->pid, task->uid,
- task->loginuid, loginuid);
+ task->loginuid, loginuid,
+ task->sessionid, sessionid);
audit_log_end(ab);
}
}
+ task->sessionid = sessionid;
task->loginuid = loginuid;
return 0;
}
@@ -2200,6 +2214,7 @@
context->target_pid = t->pid;
context->target_auid = audit_get_loginuid(t);
context->target_uid = t->uid;
+ context->target_sessionid = audit_get_sessionid(t);
selinux_get_task_sid(t, &context->target_sid);
memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
}
@@ -2240,6 +2255,7 @@
ctx->target_pid = t->tgid;
ctx->target_auid = audit_get_loginuid(t);
ctx->target_uid = t->uid;
+ ctx->target_sessionid = audit_get_sessionid(t);
selinux_get_task_sid(t, &ctx->target_sid);
memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
return 0;
@@ -2260,6 +2276,7 @@
axp->target_pid[axp->pid_count] = t->tgid;
axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
axp->target_uid[axp->pid_count] = t->uid;
+ axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]);
memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
axp->pid_count++;
@@ -2278,6 +2295,8 @@
{
struct audit_buffer *ab;
u32 sid;
+ uid_t auid = audit_get_loginuid(current);
+ unsigned int sessionid = audit_get_sessionid(current);
if (!audit_enabled)
return;
@@ -2286,9 +2305,8 @@
return;
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
- audit_log_format(ab, "auid=%u uid=%u gid=%u",
- audit_get_loginuid(current),
- current->uid, current->gid);
+ audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
+ auid, current->uid, current->gid, sessionid);
selinux_get_task_sid(current, &sid);
if (sid) {
char *ctx = NULL;
