From 4746ec5b01ed07205a91e4f7ed9de9d70f371407 Mon Sep 17 00:00:00 2001
From: Eric Paris <eparis@redhat.com>
Date: Tue, 8 Jan 2008 10:06:53 -0500
Subject: [PATCH] [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>
---
drivers/char/tty_audit.c | 18 ++++++++++++-----
include/linux/audit.h | 2 ++
include/linux/init_task.h | 3 ++-
include/linux/sched.h | 1 +
kernel/auditsc.c | 36 +++++++++++++++++++++++++---------
net/core/dev.c | 5 +++--
security/selinux/selinuxfs.c | 17 +++++++++-------
security/selinux/ss/services.c | 5 +++--
8 files changed, 61 insertions(+), 26 deletions(-)
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index c590fc45b2fd..bacded0eefab 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -73,6 +73,7 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
* @tsk with @loginuid. @buf->mutex must be locked.
*/
static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
+ unsigned int sessionid,
struct tty_audit_buf *buf)
{
struct audit_buffer *ab;
@@ -85,9 +86,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
if (ab) {
char name[sizeof(tsk->comm)];
- audit_log_format(ab, "tty pid=%u uid=%u auid=%u major=%d "
- "minor=%d comm=", tsk->pid, tsk->uid,
- loginuid, buf->major, buf->minor);
+ audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
+ "major=%d minor=%d comm=", tsk->pid, tsk->uid,
+ loginuid, sessionid, buf->major, buf->minor);
get_task_comm(name, tsk);
audit_log_untrustedstring(ab, name);
audit_log_format(ab, " data=");
@@ -105,7 +106,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
*/
static void tty_audit_buf_push_current(struct tty_audit_buf *buf)
{
- tty_audit_buf_push(current, audit_get_loginuid(current), buf);
+ uid_t auid = audit_get_loginuid(current);
+ unsigned int sessionid = audit_get_sessionid(current);
+ tty_audit_buf_push(current, auid, sessionid, buf);
}
/**
@@ -151,6 +154,11 @@ void tty_audit_fork(struct signal_struct *sig)
void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
{
struct tty_audit_buf *buf;
+ /* FIXME I think this is correct. Check against netlink once that is
+ * I really need to read this code more closely. But that's for
+ * another patch.
+ */
+ unsigned int sessionid = audit_get_sessionid(tsk);
spin_lock_irq(&tsk->sighand->siglock);
buf = tsk->signal->tty_audit_buf;
@@ -161,7 +169,7 @@ void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
return;
mutex_lock(&buf->mutex);
- tty_audit_buf_push(tsk, loginuid, buf);
+ tty_audit_buf_push(tsk, loginuid, sessionid, buf);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
diff --git a/include/linux/audit.h b/include/linux/audit.h
index d7c6a12f4d1c..52f1b12505a9 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -410,6 +410,7 @@ extern void auditsc_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial);
extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
#define audit_get_loginuid(t) ((t)->loginuid)
+#define audit_get_sessionid(t) ((t)->sessionid)
extern void audit_log_task_context(struct audit_buffer *ab);
extern int __audit_ipc_obj(struct kern_ipc_perm *ipcp);
extern int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
@@ -489,6 +490,7 @@ extern int audit_signals;
#define audit_core_dumps(i) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
#define audit_get_loginuid(t) (-1)
+#define audit_get_sessionid(t) (-1)
#define audit_log_task_context(b) do { ; } while (0)
#define audit_ipc_obj(i) ({ 0; })
#define audit_ipc_set_perm(q,u,g,m) ({ 0; })
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index ea3e9efd7396..f42663eaf655 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -116,7 +116,8 @@ extern struct group_info init_groups;
#ifdef CONFIG_AUDITSYSCALL
#define INIT_IDS \
- .loginuid = -1,
+ .loginuid = -1, \
+ .sessionid = -1,
#else
#define INIT_IDS
#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5e2730389089..af6947e69b40 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1141,6 +1141,7 @@ struct task_struct {
struct audit_context *audit_context;
#ifdef CONFIG_AUDITSYSCALL
uid_t loginuid;
+ unsigned int sessionid;
#endif
seccomp_t seccomp;
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index a222e73fec74..4e67abb02904 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -178,6 +178,7 @@ struct audit_aux_data_pids {
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 @@ struct audit_context {
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 void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
}
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 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid,
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 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
" 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 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
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 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
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 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
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 @@ void auditsc_get_stamp(struct audit_context *ctx,
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 @@ void auditsc_get_stamp(struct audit_context *ctx,
*/
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 @@ int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
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 @@ void __audit_ptrace(struct task_struct *t)
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 @@ int __audit_signal_info(int sig, struct task_struct *t)
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 @@ int __audit_signal_info(int sig, struct task_struct *t)
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 @@ void audit_core_dumps(long signr)
{
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 @@ void audit_core_dumps(long signr)
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;
diff --git a/net/core/dev.c b/net/core/dev.c
index c0b69b3bb041..ba075a9dcecb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2754,10 +2754,11 @@ static void __dev_set_promiscuity(struct net_device *dev, int inc)
"left");
audit_log(current->audit_context, GFP_ATOMIC,
AUDIT_ANOM_PROMISCUOUS,
- "dev=%s prom=%d old_prom=%d auid=%u",
+ "dev=%s prom=%d old_prom=%d auid=%u ses=%u",
dev->name, (dev->flags & IFF_PROMISC),
(old_flags & IFF_PROMISC),
- audit_get_loginuid(current));
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
if (dev->change_rx_flags)
dev->change_rx_flags(dev, IFF_PROMISC);
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index bee969432979..0341567665b3 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -172,9 +172,10 @@ static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
if (length)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "enforcing=%d old_enforcing=%d auid=%u", new_value,
- selinux_enforcing,
- audit_get_loginuid(current));
+ "enforcing=%d old_enforcing=%d auid=%u ses=%u",
+ new_value, selinux_enforcing,
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
selinux_enforcing = new_value;
if (selinux_enforcing)
avc_ss_reset(0);
@@ -243,8 +244,9 @@ static ssize_t sel_write_disable(struct file * file, const char __user * buf,
if (length < 0)
goto out;
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
- "selinux=0 auid=%u",
- audit_get_loginuid(current));
+ "selinux=0 auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
}
length = count;
@@ -356,8 +358,9 @@ out1:
(security_get_allow_unknown() ? "allow" : "deny")));
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
- "policy loaded auid=%u",
- audit_get_loginuid(current));
+ "policy loaded auid=%u ses=%u",
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
out:
mutex_unlock(&sel_mutex);
vfree(data);
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 819a6f91e801..fced6bccee76 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1905,11 +1905,12 @@ int security_set_bools(int len, int *values)
if (!!values[i] != policydb.bool_val_to_struct[i]->state) {
audit_log(current->audit_context, GFP_ATOMIC,
AUDIT_MAC_CONFIG_CHANGE,
- "bool=%s val=%d old_val=%d auid=%u",
+ "bool=%s val=%d old_val=%d auid=%u ses=%u",
policydb.p_bool_val_to_name[i],
!!values[i],
policydb.bool_val_to_struct[i]->state,
- audit_get_loginuid(current));
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
}
if (values[i]) {
policydb.bool_val_to_struct[i]->state = 1;
--
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