[3.16.y-ckt stable] Patch "net/tipc: initialize security state for new connection socket" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Thu Sep 3 10:36:58 UTC 2015


This is a note to let you know that I have just added a patch titled

    net/tipc: initialize security state for new connection socket

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt17.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 400f1f4f6b08b2b2071b8a85315f852a1a524f50 Mon Sep 17 00:00:00 2001
From: Stephen Smalley <sds at tycho.nsa.gov>
Date: Tue, 7 Jul 2015 09:43:45 -0400
Subject: net/tipc: initialize security state for new connection socket

commit fdd75ea8df370f206a8163786e7470c1277a5064 upstream.

Calling connect() with an AF_TIPC socket would trigger a series
of error messages from SELinux along the lines of:
SELinux: Invalid class 0
type=AVC msg=audit(1434126658.487:34500): avc:  denied  { <unprintable> }
  for pid=292 comm="kworker/u16:5" scontext=system_u:system_r:kernel_t:s0
  tcontext=system_u:object_r:unlabeled_t:s0 tclass=<unprintable>
  permissive=0

This was due to a failure to initialize the security state of the new
connection sock by the tipc code, leaving it with junk in the security
class field and an unlabeled secid.  Add a call to security_sk_clone()
to inherit the security state from the parent socket.

Reported-by: Tim Shearer <tim.shearer at overturenetworks.com>
Signed-off-by: Stephen Smalley <sds at tycho.nsa.gov>
Acked-by: Paul Moore <paul at paul-moore.com>
Acked-by: Ying Xue <ying.xue at windriver.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 net/tipc/socket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 4093fd81edd5..9dee1aabcfc0 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1696,6 +1696,7 @@ static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
 	res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1);
 	if (res)
 		goto exit;
+	security_sk_clone(sock->sk, new_sock->sk);

 	new_sk = new_sock->sk;
 	new_port = &tipc_sk(new_sk)->port;




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