diff -up openssh-7.4p1/openbsd-compat/port-linux.h.privsep-selinux openssh-7.4p1/openbsd-compat/port-linux.h

--- openssh-7.4p1/openbsd-compat/port-linux.h.privsep-selinux	2016-12-23 18:58:52.972122201 +0100

+++ openssh-7.4p1/openbsd-compat/port-linux.h	2016-12-23 18:58:52.974122201 +0100

@@ -23,6 +23,7 @@ void ssh_selinux_setup_pty(char *, const

 void ssh_selinux_change_context(const char *);

 void ssh_selinux_setfscreatecon(const char *);

+void sshd_selinux_copy_context(void);

 void sshd_selinux_setup_exec_context(char *);

 #endif

diff -up openssh-7.4p1/openbsd-compat/port-linux-sshd.c.privsep-selinux openssh-7.4p1/openbsd-compat/port-linux-sshd.c

--- openssh-7.4p1/openbsd-compat/port-linux-sshd.c.privsep-selinux	2016-12-23 18:58:52.973122201 +0100

+++ openssh-7.4p1/openbsd-compat/port-linux-sshd.c	2016-12-23 18:58:52.974122201 +0100

@@ -419,6 +419,28 @@ sshd_selinux_setup_exec_context(char *pw

 	debug3("%s: done", __func__);

 }

+void

+sshd_selinux_copy_context(void)

+{

+	security_context_t *ctx;

+

+	if (!ssh_selinux_enabled())

+		return;

+

+	if (getexeccon((security_context_t *)&ctx) != 0) {

+		logit("%s: getexeccon failed with %s", __func__, strerror(errno));

+		return;

+	}

+	if (ctx != NULL) {

+		/* unset exec context before we will lose this capabililty */

+		if (setexeccon(NULL) != 0)

+			fatal("%s: setexeccon failed with %s", __func__, strerror(errno));

+		if (setcon(ctx) != 0)

+			fatal("%s: setcon failed with %s", __func__, strerror(errno));

+		freecon(ctx);

+	}

+}

+

 #endif

 #endif

diff -up openssh-7.4p1/session.c.privsep-selinux openssh-7.4p1/session.c

--- openssh-7.4p1/session.c.privsep-selinux	2016-12-19 05:59:41.000000000 +0100

+++ openssh-7.4p1/session.c	2016-12-23 18:58:52.974122201 +0100

@@ -1331,7 +1331,7 @@ do_setusercontext(struct passwd *pw)

 	platform_setusercontext(pw);

-	if (platform_privileged_uidswap()) {

+	if (platform_privileged_uidswap() && (!is_child || !use_privsep)) {

 #ifdef HAVE_LOGIN_CAP

 		if (setusercontext(lc, pw, pw->pw_uid,

 		    (LOGIN_SETALL & ~(LOGIN_SETPATH|LOGIN_SETUSER))) < 0) {

@@ -1361,6 +1361,9 @@ do_setusercontext(struct passwd *pw)

			    (unsigned long long)pw->pw_uid);

			chroot_path = percent_expand(tmp, "h", pw->pw_dir,

			    "u", pw->pw_name, "U", uidstr, (char *)NULL);

+#ifdef WITH_SELINUX

+			sshd_selinux_copy_context();

+#endif

 			safely_chroot(chroot_path, pw->pw_uid);

 			free(tmp);

 			free(chroot_path);

@@ -1396,6 +1399,11 @@ do_setusercontext(struct passwd *pw)

 		/* Permanently switch to the desired uid. */

 		permanently_set_uid(pw);

 #endif

+

+#ifdef WITH_SELINUX

+		if (in_chroot == 0)

+			sshd_selinux_copy_context();

+#endif

 	} else if (options.chroot_directory != NULL &&

 	    strcasecmp(options.chroot_directory, "none") != 0) {

 		fatal("server lacks privileges to chroot to ChrootDirectory");

@@ -1413,9 +1421,6 @@ do_pwchange(Session *s)

 	if (s->ttyfd != -1) {

 		fprintf(stderr,

 		    "You must change your password now and login again!\n");

-#ifdef WITH_SELINUX

-		setexeccon(NULL);

-#endif

 #ifdef PASSWD_NEEDS_USERNAME

 		execl(_PATH_PASSWD_PROG, "passwd", s->pw->pw_name,

 		    (char *)NULL);

@@ -1625,9 +1630,6 @@ do_child(Session *s, const char *command

 		argv[i] = NULL;

 		optind = optreset = 1;

 		__progname = argv[0];

-#ifdef WITH_SELINUX

-		ssh_selinux_change_context("sftpd_t");

-#endif

 		exit(sftp_server_main(i, argv, s->pw));

 	}

diff -up openssh-7.4p1/sshd.c.privsep-selinux openssh-7.4p1/sshd.c

--- openssh-7.4p1/sshd.c.privsep-selinux	2016-12-23 18:58:52.973122201 +0100

+++ openssh-7.4p1/sshd.c	2016-12-23 18:59:13.808124269 +0100

@@ -540,6 +540,10 @@ privsep_preauth_child(void)

 	/* Demote the private keys to public keys. */

 	demote_sensitive_data();

+#ifdef WITH_SELINUX

+	ssh_selinux_change_context("sshd_net_t");

+#endif

+

 	/* Demote the child */

 	if (privsep_chroot) {

 		/* Change our root directory */

@@ -633,6 +637,9 @@ privsep_postauth(Authctxt *authctxt)

 {

 #ifdef DISABLE_FD_PASSING

 	if (1) {

+#elif defined(WITH_SELINUX)

+	if (0) {

+		/* even root user can be confined by SELinux */

 #else

 	if (authctxt->pw->pw_uid == 0) {

 #endif