diff options
Diffstat (limited to 'meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0055-Smack-Assign-smack_known_web-as-default-smk_in-label.patch')
| -rw-r--r-- | meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0055-Smack-Assign-smack_known_web-as-default-smk_in-label.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0055-Smack-Assign-smack_known_web-as-default-smk_in-label.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0055-Smack-Assign-smack_known_web-as-default-smk_in-label.patch new file mode 100644 index 0000000..18353d3 --- /dev/null +++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0055-Smack-Assign-smack_known_web-as-default-smk_in-label.patch @@ -0,0 +1,55 @@ +From 292f377160c78213af88b5cc069dbdaa08db17dd Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jos=C3=A9=20Bollo?= <jose.bollo@iot.bzh> +Date: Wed, 2 Nov 2016 11:11:01 +0100 +Subject: [PATCH 55/56] Smack: Assign smack_known_web as default smk_in label + for kernel thread's socket +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This change fixes the bug associated with sockets owned by kernel threads. These +sockets, created usually by network devices' drivers tasks, received smk_in +label from the task that created them - the "floor" label in the most cases. The +result was that they were not able to receive data packets because of missing +smack rules. The main reason of the access deny is that the socket smk_in label +is placed as the object during smk check, kernel thread's capabilities are +omitted. + +Refers-to: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7412301b76bd53ee53b860f611fc3b5b1c2245b5 +Change-Id: Icec88b0d51133df8d0a09ea8016233bde255af10 +Signed-off-by: Marcin Lis <m.lis@samsung.com> +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +--- + security/smack/smack_lsm.c | 16 +++++++++++++++- + 1 file changed, 15 insertions(+), 1 deletion(-) + +diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c +index 895fe5c..ff696e7 100644 +--- a/security/smack/smack_lsm.c ++++ b/security/smack/smack_lsm.c +@@ -2453,7 +2453,21 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name, + static int smack_socket_post_create(struct socket *sock, int family, + int type, int protocol, int kern) + { +- if (family != PF_INET || sock->sk == NULL) ++ struct socket_smack *ssp; ++ ++ if (sock->sk == NULL) ++ return 0; ++ ++ /* ++ * Sockets created by kernel threads receive web label. ++ */ ++ if (unlikely(current->flags & PF_KTHREAD)) { ++ ssp = sock->sk->sk_security; ++ ssp->smk_in = &smack_known_web; ++ ssp->smk_out = &smack_known_web; ++ } ++ ++ if (family != PF_INET) + return 0; + /* + * Set the outbound netlbl. +-- +2.7.4 + |