Smack: fixup of bluetooth socket labelling

The sockets created by kernel thread will now be
tagged @ instead of _.

Change-Id: I92dcc885e9e8f7b45076f7df7a0e1ef4e66453a3
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 49 insertions, 0 deletions

diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0056-Smack-Assign-smack_known_web-label-for-kernel-thread.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0056-Smack-Assign-smack_known_web-label-for-kernel-thread.patch
new file mode 100644
index 0000000..b045101
--- /dev/null
+++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0056-Smack-Assign-smack_known_web-label-for-kernel-thread.patch
@@ -0,0 +1,49 @@
+From ea1c9711146e251c809ecf7eb348b548ac6e967c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jos=C3=A9=20Bollo?= <jose.bollo@iot.bzh>
+Date: Wed, 2 Nov 2016 11:01:15 +0100
+Subject: [PATCH 56/56] Smack: Assign smack_known_web label for kernel thread's
+ socket in the sk_alloc_security hook
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Creating struct sock by sk_alloc function in various kernel subsystems
+like bluetooth dosen't call smack_socket_post_create(). In such case,
+received sock label is the floor('_') label and makes access deny.
+
+Refers-to: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7412301b76bd53ee53b860f611fc3b5b1c2245b5
+Refers-to: https://review.tizen.org/gerrit/#/c/80717/4
+
+Change-Id: I614c5f0e6d59be5ca6b49f0581edfef79fc334cf
+Signed-off-by: jooseong lee <jooseong.lee@samsung.com>
+Signed-off-by: José Bollo <jose.bollo@iot.bzh>
+---
+ security/smack/smack_lsm.c | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
+index ff696e7..94914db 100644
+--- a/security/smack/smack_lsm.c
++++ b/security/smack/smack_lsm.c
+@@ -2075,8 +2075,16 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
+ 	if (ssp == NULL)
+ 		return -ENOMEM;
+ 
+-	ssp->smk_in = skp;
+-	ssp->smk_out = skp;
++	/*
++	 * Sockets created by kernel threads receive web label.
++	 */
++	if (unlikely(current->flags & PF_KTHREAD)) {
++		ssp->smk_in = &smack_known_web;
++		ssp->smk_out = &smack_known_web;
++	} else {
++		ssp->smk_in = skp;
++		ssp->smk_out = skp;
++	}
+ 	ssp->smk_packet = NULL;
+ 
+ 	sk->sk_security = ssp;
+-- 
+2.7.4
+