Commit f1dc4867 authored by Richard Guy Briggs's avatar Richard Guy Briggs Committed by Eric Paris
Browse files

audit: anchor all pid references in the initial pid namespace 



Store and log all PIDs with reference to the initial PID namespace and
use the access functions task_pid_nr() and task_tgid_nr() for task->pid
and task->tgid.

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
(informed by ebiederman's c776b5d2)
Signed-off-by: default avatarRichard Guy Briggs <rgb@redhat.com>
parent c92cdeb4

drivers/tty/tty_audit.c

+2 −1
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ static void tty_audit_log(const char *description, int major, int minor, 
{

	struct audit_buffer *ab;

	struct task_struct *tsk = current;

	pid_t pid = task_pid_nr(tsk);

	uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));

	uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));

	unsigned int sessionid = audit_get_sessionid(tsk);
@@ -74,7 +75,7 @@ static void tty_audit_log(const char *description, int major, int minor, 
		char name[sizeof(tsk->comm)];



		audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u major=%d"

				 " minor=%d comm=", description, tsk->pid, uid,

				 " minor=%d comm=", description, pid, uid,

				 loginuid, sessionid, major, minor);

		get_task_comm(name, tsk);

		audit_log_untrustedstring(ab, name);

kernel/audit.c

+3 −2
Original line number Diff line number Diff line
@@ -649,6 +649,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) 
{

	int rc = 0;

	uid_t uid = from_kuid(&init_user_ns, current_uid());

	pid_t pid = task_tgid_nr(current);



	if (!audit_enabled && msg_type != AUDIT_USER_AVC) {

		*ab = NULL;
@@ -658,7 +659,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) 
	*ab = audit_log_start(NULL, GFP_KERNEL, msg_type);

	if (unlikely(!*ab))

		return rc;

	audit_log_format(*ab, "pid=%d uid=%u", task_tgid_vnr(current), uid);

	audit_log_format(*ab, "pid=%d uid=%u", pid, uid);

	audit_log_session_info(*ab);

	audit_log_task_context(*ab);
@@ -1823,7 +1824,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) 
			 " euid=%u suid=%u fsuid=%u"

			 " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",

			 task_ppid_nr(tsk),

			 tsk->pid,

			 task_pid_nr(tsk),

			 from_kuid(&init_user_ns, audit_get_loginuid(tsk)),

			 from_kuid(&init_user_ns, cred->uid),

			 from_kgid(&init_user_ns, cred->gid),

kernel/auditfilter.c

+16 −1
Original line number Diff line number Diff line
@@ -433,6 +433,19 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data, 
			f->val = 0;

		}



		if ((f->type == AUDIT_PID) || (f->type == AUDIT_PPID)) {

			struct pid *pid;

			rcu_read_lock();

			pid = find_vpid(f->val);

			if (!pid) {

				rcu_read_unlock();

				err = -ESRCH;

				goto exit_free;

			}

			f->val = pid_nr(pid);

			rcu_read_unlock();

		}



		err = audit_field_valid(entry, f);

		if (err)

			goto exit_free;
@@ -1242,12 +1255,14 @@ static int audit_filter_user_rules(struct audit_krule *rule, int type, 


	for (i = 0; i < rule->field_count; i++) {

		struct audit_field *f = &rule->fields[i];

		pid_t pid;

		int result = 0;

		u32 sid;



		switch (f->type) {

		case AUDIT_PID:

			result = audit_comparator(task_pid_vnr(current), f->op, f->val);

			pid = task_pid_nr(current);

			result = audit_comparator(pid, f->op, f->val);

			break;

		case AUDIT_UID:

			result = audit_uid_comparator(current_uid(), f->op, f->uid);

kernel/auditsc.c

+9 −7
Original line number Diff line number Diff line
@@ -457,10 +457,12 @@ static int audit_filter_rules(struct task_struct *tsk, 
		struct audit_field *f = &rule->fields[i];

		struct audit_names *n;

		int result = 0;

		pid_t pid;



		switch (f->type) {

		case AUDIT_PID:

			result = audit_comparator(tsk->pid, f->op, f->val);

			pid = task_pid_nr(tsk);

			result = audit_comparator(pid, f->op, f->val);

			break;

		case AUDIT_PPID:

			if (ctx) {
@@ -2051,7 +2053,7 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid, 
	audit_log_format(ab, "pid=%d uid=%u"

			 " old-auid=%u new-auid=%u old-ses=%u new-ses=%u"

			 " res=%d",

			 current->pid, uid,

			 task_pid_nr(current), uid,

			 oldloginuid, loginuid, oldsessionid, sessionid,

			 !rc);

	audit_log_end(ab);
@@ -2275,7 +2277,7 @@ void __audit_ptrace(struct task_struct *t) 
{

	struct audit_context *context = current->audit_context;



	context->target_pid = t->pid;

	context->target_pid = task_pid_nr(t);

	context->target_auid = audit_get_loginuid(t);

	context->target_uid = task_uid(t);

	context->target_sessionid = audit_get_sessionid(t);
@@ -2300,7 +2302,7 @@ int __audit_signal_info(int sig, struct task_struct *t) 


	if (audit_pid && t->tgid == audit_pid) {

		if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) {

			audit_sig_pid = tsk->pid;

			audit_sig_pid = task_pid_nr(tsk);

			if (uid_valid(tsk->loginuid))

				audit_sig_uid = tsk->loginuid;

			else
@@ -2314,7 +2316,7 @@ int __audit_signal_info(int sig, struct task_struct *t) 
	/* optimize the common case by putting first signal recipient directly

	 * in audit_context */

	if (!ctx->target_pid) {

		ctx->target_pid = t->tgid;

		ctx->target_pid = task_tgid_nr(t);

		ctx->target_auid = audit_get_loginuid(t);

		ctx->target_uid = t_uid;

		ctx->target_sessionid = audit_get_sessionid(t);
@@ -2335,7 +2337,7 @@ int __audit_signal_info(int sig, struct task_struct *t) 
	}

	BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);



	axp->target_pid[axp->pid_count] = t->tgid;

	axp->target_pid[axp->pid_count] = task_tgid_nr(t);

	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);
@@ -2435,7 +2437,7 @@ static void audit_log_task(struct audit_buffer *ab) 
			 from_kgid(&init_user_ns, gid),

			 sessionid);

	audit_log_task_context(ab);

	audit_log_format(ab, " pid=%d comm=", current->pid);

	audit_log_format(ab, " pid=%d comm=", task_pid_nr(current));

	audit_log_untrustedstring(ab, current->comm);

	if (mm) {

		down_read(&mm->mmap_sem);

security/integrity/integrity_audit.c

+1 −1
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode, 


	ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);

	audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",

			 current->pid,

			 task_pid_nr(current),

			 from_kuid(&init_user_ns, current_cred()->uid),

			 from_kuid(&init_user_ns, audit_get_loginuid(current)),

			 audit_get_sessionid(current));

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