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Commit 6230c9b4 authored by Paul Moore's avatar Paul Moore Committed by David S. Miller
Browse files

bluetooth: Properly clone LSM attributes to newly created child connections 

The Bluetooth stack has internal connection handlers for all of the various
Bluetooth protocols, and unfortunately, they are currently lacking the LSM
hooks found in the core network stack's connection handlers.  I say
unfortunately, because this can cause problems for users who have have an
LSM enabled and are using certain Bluetooth devices.  See one problem
report below:

 * http://bugzilla.redhat.com/show_bug.cgi?id=741703



In order to keep things simple at this point in time, this patch fixes the
problem by cloning the parent socket's LSM attributes to the newly created
child socket.  If we decide we need a more elaborate LSM marking mechanism
for Bluetooth (I somewhat doubt this) we can always revisit this decision
in the future.

Reported-by: default avatarJames M. Cape <jcape@ignore-your.tv>
Signed-off-by: default avatarPaul Moore <pmoore@redhat.com>
Acked-by: default avatarJames Morris <jmorris@namei.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 835acf5d

net/bluetooth/l2cap_sock.c

+4 −0
Original line number Diff line number Diff line
@@ -26,6 +26,8 @@ 


/* Bluetooth L2CAP sockets. */



#include <linux/security.h>



#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>

#include <net/bluetooth/l2cap.h>
@@ -933,6 +935,8 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent) 
		chan->force_reliable = pchan->force_reliable;

		chan->flushable = pchan->flushable;

		chan->force_active = pchan->force_active;



		security_sk_clone(parent, sk);

	} else {



		switch (sk->sk_type) {

net/bluetooth/rfcomm/sock.c

+3 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/device.h>

#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/security.h>

#include <net/sock.h>



#include <asm/system.h>
@@ -264,6 +265,8 @@ static void rfcomm_sock_init(struct sock *sk, struct sock *parent) 


		pi->sec_level = rfcomm_pi(parent)->sec_level;

		pi->role_switch = rfcomm_pi(parent)->role_switch;



		security_sk_clone(parent, sk);

	} else {

		pi->dlc->defer_setup = 0;

net/bluetooth/sco.c

+4 −1
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ 
#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/list.h>

#include <linux/security.h>

#include <net/sock.h>



#include <asm/system.h>
@@ -403,8 +404,10 @@ static void sco_sock_init(struct sock *sk, struct sock *parent) 
{

	BT_DBG("sk %p", sk);



	if (parent)

	if (parent) {

		sk->sk_type = parent->sk_type;

		security_sk_clone(parent, sk);

	}

}



static struct proto sco_proto = {

security/security.c

+1 −0
Original line number Diff line number Diff line
@@ -1097,6 +1097,7 @@ void security_sk_clone(const struct sock *sk, struct sock *newsk) 
{

	security_ops->sk_clone_security(sk, newsk);

}

EXPORT_SYMBOL(security_sk_clone);



void security_sk_classify_flow(struct sock *sk, struct flowi *fl)

{