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-rw-r--r--meta-agl-bsp/recipes-kernel/linux/linux-4.9/0004-Smack-Assign-smack_known_web-label-for-kernel-thread.patch49
1 files changed, 49 insertions, 0 deletions
diff --git a/meta-agl-bsp/recipes-kernel/linux/linux-4.9/0004-Smack-Assign-smack_known_web-label-for-kernel-thread.patch b/meta-agl-bsp/recipes-kernel/linux/linux-4.9/0004-Smack-Assign-smack_known_web-label-for-kernel-thread.patch
new file mode 100644
index 000000000..a1eeac3d7
--- /dev/null
+++ b/meta-agl-bsp/recipes-kernel/linux/linux-4.9/0004-Smack-Assign-smack_known_web-label-for-kernel-thread.patch
@@ -0,0 +1,49 @@
+From c8bbb0f916de54610513e376070aea531af19dd6 Mon Sep 17 00:00:00 2001
+From: jooseong lee <jooseong.lee@samsung.com>
+Date: Thu, 3 Nov 2016 10:55:43 +0100
+Subject: [PATCH 4/4] Smack: Assign smack_known_web label for kernel thread's
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Assign smack_known_web label for kernel thread's socket in the sk_alloc_security hook
+
+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: https://review.tizen.org/gerrit/#/c/80717/4
+
+Change-Id: I2e5c9359bfede84a988fd4d4d74cdb9dfdfc52d8
+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 cf8a93f..21651bc 100644
+--- a/security/smack/smack_lsm.c
++++ b/security/smack/smack_lsm.c
+@@ -2321,8 +2321,16 @@ 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
+