From c89ad7372232b69fd37edf90d6f5d2a8d6381214 Mon Sep 17 00:00:00 2001
From: "Gustavo F. Padovan" <padovan@profusion.mobi>
Date: Mon, 1 Nov 2010 19:08:50 +0000
Subject: Bluetooth: Fix not returning proper error in SCO

Return 0 in that situation could lead to errors in the caller.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/sco.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index d0927d1fdada..66b9e5c0523a 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -882,7 +882,7 @@ static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
 	int lm = 0;
 
 	if (type != SCO_LINK && type != ESCO_LINK)
-		return 0;
+		return -EINVAL;
 
 	BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
 
@@ -908,7 +908,7 @@ static int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
 	BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
 
 	if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
-		return 0;
+		return -EINVAL;
 
 	if (!status) {
 		struct sco_conn *conn;
@@ -927,7 +927,7 @@ static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
 	BT_DBG("hcon %p reason %d", hcon, reason);
 
 	if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
-		return 0;
+		return -EINVAL;
 
 	sco_conn_del(hcon, bt_err(reason));
 
-- 
cgit v1.2.1


From ccd556fe334914bf2e465eb5bc480d49cd4406d7 Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@nokia.com>
Date: Wed, 10 Nov 2010 17:11:51 +0200
Subject: Bluetooth: Simplify remote features callback function logic

The current remote and remote extended features event callbacks logic
can be made simpler by using a label and goto statements instead of the
current multiple levels of nested if statements.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hci_event.c | 91 ++++++++++++++++++++++++-----------------------
 1 file changed, 47 insertions(+), 44 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 84093b0000b9..84302768939a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1162,33 +1162,33 @@ static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff
 	hci_dev_lock(hdev);
 
 	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
-	if (conn) {
-		if (!ev->status)
-			memcpy(conn->features, ev->features, 8);
+	if (!conn)
+		goto unlock;
 
-		if (conn->state == BT_CONFIG) {
-			if (!ev->status && lmp_ssp_capable(hdev) &&
-						lmp_ssp_capable(conn)) {
-				struct hci_cp_read_remote_ext_features cp;
-				cp.handle = ev->handle;
-				cp.page = 0x01;
-				hci_send_cmd(hdev,
-					HCI_OP_READ_REMOTE_EXT_FEATURES,
-							sizeof(cp), &cp);
-			} else if (!ev->status && conn->out &&
-					conn->sec_level == BT_SECURITY_HIGH) {
-				struct hci_cp_auth_requested cp;
-				cp.handle = ev->handle;
-				hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
+	if (!ev->status)
+		memcpy(conn->features, ev->features, 8);
+
+	if (conn->state != BT_CONFIG)
+		goto unlock;
+
+	if (!ev->status && lmp_ssp_capable(hdev) && lmp_ssp_capable(conn)) {
+		struct hci_cp_read_remote_ext_features cp;
+		cp.handle = ev->handle;
+		cp.page = 0x01;
+		hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
 							sizeof(cp), &cp);
-			} else {
-				conn->state = BT_CONNECTED;
-				hci_proto_connect_cfm(conn, ev->status);
-				hci_conn_put(conn);
-			}
-		}
+	} else if (!ev->status && conn->out &&
+			conn->sec_level == BT_SECURITY_HIGH) {
+		struct hci_cp_auth_requested cp;
+		cp.handle = ev->handle;
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+	} else {
+		conn->state = BT_CONNECTED;
+		hci_proto_connect_cfm(conn, ev->status);
+		hci_conn_put(conn);
 	}
 
+unlock:
 	hci_dev_unlock(hdev);
 }
 
@@ -1646,32 +1646,35 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 	hci_dev_lock(hdev);
 
 	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
-	if (conn) {
-		if (!ev->status && ev->page == 0x01) {
-			struct inquiry_entry *ie;
+	if (!conn)
+		goto unlock;
 
-			if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst)))
-				ie->data.ssp_mode = (ev->features[0] & 0x01);
+	if (!ev->status && ev->page == 0x01) {
+		struct inquiry_entry *ie;
 
-			conn->ssp_mode = (ev->features[0] & 0x01);
-		}
+		if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst)))
+			ie->data.ssp_mode = (ev->features[0] & 0x01);
 
-		if (conn->state == BT_CONFIG) {
-			if (!ev->status && hdev->ssp_mode > 0 &&
-					conn->ssp_mode > 0 && conn->out &&
-					conn->sec_level != BT_SECURITY_SDP) {
-				struct hci_cp_auth_requested cp;
-				cp.handle = ev->handle;
-				hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
-							sizeof(cp), &cp);
-			} else {
-				conn->state = BT_CONNECTED;
-				hci_proto_connect_cfm(conn, ev->status);
-				hci_conn_put(conn);
-			}
-		}
+		conn->ssp_mode = (ev->features[0] & 0x01);
+	}
+
+	if (conn->state != BT_CONFIG)
+		goto unlock;
+
+	if (!ev->status && hdev->ssp_mode > 0 &&
+			conn->ssp_mode > 0 && conn->out &&
+			conn->sec_level != BT_SECURITY_SDP) {
+		struct hci_cp_auth_requested cp;
+		cp.handle = ev->handle;
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
+				sizeof(cp), &cp);
+	} else {
+		conn->state = BT_CONNECTED;
+		hci_proto_connect_cfm(conn, ev->status);
+		hci_conn_put(conn);
 	}
 
+unlock:
 	hci_dev_unlock(hdev);
 }
 
-- 
cgit v1.2.1


From 392599b95d76f4f3102d8614bdc1957795cd1a3a Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@nokia.com>
Date: Thu, 18 Nov 2010 22:22:28 +0200
Subject: Bluetooth: Create a unified authentication request function

This patch adds a single function that's responsible for requesting
authentication for outgoing connections. This is preparation for the
next patch which will add automated name requests and thereby move the
authentication requests to a different location.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hci_event.c | 54 +++++++++++++++++++++++++++++++++++------------
 1 file changed, 40 insertions(+), 14 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 84302768939a..9c6d9bc1d8af 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -677,6 +677,29 @@ static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
 	hci_dev_unlock(hdev);
 }
 
+static int hci_request_outgoing_auth(struct hci_dev *hdev,
+						struct hci_conn *conn)
+{
+	struct hci_cp_auth_requested cp;
+
+	if (conn->state != BT_CONFIG || !conn->out)
+		return 0;
+
+	if (conn->sec_level == BT_SECURITY_SDP)
+		return 0;
+
+	/* Only request authentication for SSP connections or non-SSP
+	 * devices with sec_level HIGH */
+	if (!(hdev->ssp_mode > 0 && conn->ssp_mode > 0) &&
+					conn->sec_level != BT_SECURITY_HIGH)
+		return 0;
+
+	cp.handle = __cpu_to_le16(conn->handle);
+	hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+
+	return 1;
+}
+
 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
 {
 	BT_DBG("%s status 0x%x", hdev->name, status);
@@ -1156,6 +1179,7 @@ static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff
 {
 	struct hci_ev_remote_features *ev = (void *) skb->data;
 	struct hci_conn *conn;
+	int auth_requested;
 
 	BT_DBG("%s status %d", hdev->name, ev->status);
 
@@ -1177,12 +1201,15 @@ static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff
 		cp.page = 0x01;
 		hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
 							sizeof(cp), &cp);
-	} else if (!ev->status && conn->out &&
-			conn->sec_level == BT_SECURITY_HIGH) {
-		struct hci_cp_auth_requested cp;
-		cp.handle = ev->handle;
-		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
-	} else {
+		goto unlock;
+	}
+
+	if (!ev->status)
+		auth_requested = hci_request_outgoing_auth(hdev, conn);
+	else
+		auth_requested = 0;
+
+	if (!auth_requested) {
 		conn->state = BT_CONNECTED;
 		hci_proto_connect_cfm(conn, ev->status);
 		hci_conn_put(conn);
@@ -1640,6 +1667,7 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 {
 	struct hci_ev_remote_ext_features *ev = (void *) skb->data;
 	struct hci_conn *conn;
+	int auth_requested;
 
 	BT_DBG("%s", hdev->name);
 
@@ -1661,14 +1689,12 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 	if (conn->state != BT_CONFIG)
 		goto unlock;
 
-	if (!ev->status && hdev->ssp_mode > 0 &&
-			conn->ssp_mode > 0 && conn->out &&
-			conn->sec_level != BT_SECURITY_SDP) {
-		struct hci_cp_auth_requested cp;
-		cp.handle = ev->handle;
-		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
-				sizeof(cp), &cp);
-	} else {
+	if (!ev->status)
+		auth_requested = hci_request_outgoing_auth(hdev, conn);
+	else
+		auth_requested = 0;
+
+	if (!auth_requested) {
 		conn->state = BT_CONNECTED;
 		hci_proto_connect_cfm(conn, ev->status);
 		hci_conn_put(conn);
-- 
cgit v1.2.1


From 127178d24c7eb2df53b1ba2b6f6f743e88178a1b Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@nokia.com>
Date: Thu, 18 Nov 2010 22:22:29 +0200
Subject: Bluetooth: Automate remote name requests

In Bluetooth there are no automatic updates of remote device names when
they get changed on the remote side. Instead, it is a good idea to do a
manual name request when a new connection gets created (for whatever
reason) since at this point it is very cheap (no costly baseband
connection creation needed just for the sake of the name request).

So far userspace has been responsible for this extra name request but
tighter control is needed in order not to flood Bluetooth controllers
with two many commands during connection creation. It has been shown
that some controllers simply fail to function correctly if they get too
many (almost) simultaneous commands during connection creation. The
simplest way to acheive better control of these commands is to move
their sending completely to the kernel side.

This patch inserts name requests into the sequence of events that the
kernel performs during connection creation. It does this after the
remote features have been successfully requested and before any pending
authentication requests are performed. The code will work sub-optimally
with userspace versions that still do the name requesting themselves (it
shouldn't break anything though) so it is recommended to combine this
with a userspace software version that doesn't have automated name
requests.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hci_event.c | 72 +++++++++++++++++++++++++++++++++++------------
 1 file changed, 54 insertions(+), 18 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 9c6d9bc1d8af..4165895049b3 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -677,11 +677,9 @@ static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
 	hci_dev_unlock(hdev);
 }
 
-static int hci_request_outgoing_auth(struct hci_dev *hdev,
+static int hci_outgoing_auth_needed(struct hci_dev *hdev,
 						struct hci_conn *conn)
 {
-	struct hci_cp_auth_requested cp;
-
 	if (conn->state != BT_CONFIG || !conn->out)
 		return 0;
 
@@ -694,15 +692,35 @@ static int hci_request_outgoing_auth(struct hci_dev *hdev,
 					conn->sec_level != BT_SECURITY_HIGH)
 		return 0;
 
-	cp.handle = __cpu_to_le16(conn->handle);
-	hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
-
 	return 1;
 }
 
 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
 {
+	struct hci_cp_remote_name_req *cp;
+	struct hci_conn *conn;
+
 	BT_DBG("%s status 0x%x", hdev->name, status);
+
+	/* If successful wait for the name req complete event before
+	 * checking for the need to do authentication */
+	if (!status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
+	if (conn && hci_outgoing_auth_needed(hdev, conn)) {
+		struct hci_cp_auth_requested cp;
+		cp.handle = __cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+	}
+
+	hci_dev_unlock(hdev);
 }
 
 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
@@ -1113,9 +1131,23 @@ static inline void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *s
 
 static inline void hci_remote_name_evt(struct hci_dev *hdev, struct sk_buff *skb)
 {
+	struct hci_ev_remote_name *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
 	BT_DBG("%s", hdev->name);
 
 	hci_conn_check_pending(hdev);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+	if (conn && hci_outgoing_auth_needed(hdev, conn)) {
+		struct hci_cp_auth_requested cp;
+		cp.handle = __cpu_to_le16(conn->handle);
+		hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+	}
+
+	hci_dev_unlock(hdev);
 }
 
 static inline void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
@@ -1179,7 +1211,6 @@ static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff
 {
 	struct hci_ev_remote_features *ev = (void *) skb->data;
 	struct hci_conn *conn;
-	int auth_requested;
 
 	BT_DBG("%s status %d", hdev->name, ev->status);
 
@@ -1204,12 +1235,15 @@ static inline void hci_remote_features_evt(struct hci_dev *hdev, struct sk_buff
 		goto unlock;
 	}
 
-	if (!ev->status)
-		auth_requested = hci_request_outgoing_auth(hdev, conn);
-	else
-		auth_requested = 0;
+	if (!ev->status) {
+		struct hci_cp_remote_name_req cp;
+		memset(&cp, 0, sizeof(cp));
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.pscan_rep_mode = 0x02;
+		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
+	}
 
-	if (!auth_requested) {
+	if (!hci_outgoing_auth_needed(hdev, conn)) {
 		conn->state = BT_CONNECTED;
 		hci_proto_connect_cfm(conn, ev->status);
 		hci_conn_put(conn);
@@ -1667,7 +1701,6 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 {
 	struct hci_ev_remote_ext_features *ev = (void *) skb->data;
 	struct hci_conn *conn;
-	int auth_requested;
 
 	BT_DBG("%s", hdev->name);
 
@@ -1689,12 +1722,15 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 	if (conn->state != BT_CONFIG)
 		goto unlock;
 
-	if (!ev->status)
-		auth_requested = hci_request_outgoing_auth(hdev, conn);
-	else
-		auth_requested = 0;
+	if (!ev->status) {
+		struct hci_cp_remote_name_req cp;
+		memset(&cp, 0, sizeof(cp));
+		bacpy(&cp.bdaddr, &conn->dst);
+		cp.pscan_rep_mode = 0x02;
+		hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
+	}
 
-	if (!auth_requested) {
+	if (!hci_outgoing_auth_needed(hdev, conn)) {
 		conn->state = BT_CONNECTED;
 		hci_proto_connect_cfm(conn, ev->status);
 		hci_conn_put(conn);
-- 
cgit v1.2.1


From 5520d20f68310fc158dcbbecfd5eac5cdfc5a241 Mon Sep 17 00:00:00 2001
From: Vasiliy Kulikov <segooon@gmail.com>
Date: Sat, 30 Oct 2010 18:26:21 +0400
Subject: Bluetooth: bnep: fix information leak to userland

Structure bnep_conninfo is copied to userland with the field "device"
that has the last elements unitialized.  It leads to leaking of
contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/bnep/core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index f10b41fb05a0..5868597534e5 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -648,6 +648,7 @@ int bnep_del_connection(struct bnep_conndel_req *req)
 
 static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
 {
+	memset(ci, 0, sizeof(*ci));
 	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
 	strcpy(ci->device, s->dev->name);
 	ci->flags = s->flags;
-- 
cgit v1.2.1


From 3185fbd9d7bb166992f072440b3329f58bf2c60a Mon Sep 17 00:00:00 2001
From: Vasiliy Kulikov <segooon@gmail.com>
Date: Sat, 30 Oct 2010 18:26:26 +0400
Subject: Bluetooth: cmtp: fix information leak to userland

Structure cmtp_conninfo is copied to userland with some padding fields
unitialized.  It leads to leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/cmtp/core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index ec0a1347f933..8e5f292529ac 100644
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -78,6 +78,7 @@ static void __cmtp_unlink_session(struct cmtp_session *session)
 
 static void __cmtp_copy_session(struct cmtp_session *session, struct cmtp_conninfo *ci)
 {
+	memset(ci, 0, sizeof(*ci));
 	bacpy(&ci->bdaddr, &session->bdaddr);
 
 	ci->flags = session->flags;
-- 
cgit v1.2.1


From d31dbf6e5989b2fd9a30ec5b25436e94f009d6df Mon Sep 17 00:00:00 2001
From: Vasiliy Kulikov <segooon@gmail.com>
Date: Sat, 30 Oct 2010 18:26:31 +0400
Subject: Bluetooth: hidp: fix information leak to userland

Structure hidp_conninfo is copied to userland with version, product,
vendor and name fields unitialized if both session->input and session->hid
are NULL.  It leads to leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hidp/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index c0ee8b3928ed..29544c21f4b5 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -107,6 +107,7 @@ static void __hidp_unlink_session(struct hidp_session *session)
 
 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
 {
+	memset(ci, 0, sizeof(*ci));
 	bacpy(&ci->bdaddr, &session->bdaddr);
 
 	ci->flags = session->flags;
@@ -115,7 +116,6 @@ static void __hidp_copy_session(struct hidp_session *session, struct hidp_connin
 	ci->vendor  = 0x0000;
 	ci->product = 0x0000;
 	ci->version = 0x0000;
-	memset(ci->name, 0, 128);
 
 	if (session->input) {
 		ci->vendor  = session->input->id.vendor;
-- 
cgit v1.2.1


From a49184c229535ebedbb659214db2d4d1d77b7c07 Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 3 Nov 2010 12:32:44 +0200
Subject: Bluetooth: Check sk is not owned before freeing l2cap_conn

Check that socket sk is not locked in user process before removing
l2cap connection handler.

lock_sock and release_sock do not hold a normal spinlock directly but
instead hold the owner field. This means bh_lock_sock can still execute
even if the socket is "locked". More info can be found here:
http://www.linuxfoundation.org/collaborate/workgroups/networking/socketlocks

krfcommd kernel thread may be preempted with l2cap tasklet which remove
l2cap_conn structure. If krfcommd is in process of sending of RFCOMM reply
(like "RFCOMM UA" reply to "RFCOMM DISC") then kernel crash happens.

...
[  694.175933] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[  694.184936] pgd = c0004000
[  694.187683] [00000000] *pgd=00000000
[  694.191711] Internal error: Oops: 5 [#1] PREEMPT
[  694.196350] last sysfs file: /sys/devices/platform/hci_h4p/firmware/hci_h4p/loading
[  694.260375] CPU: 0    Not tainted  (2.6.32.10 #1)
[  694.265106] PC is at l2cap_sock_sendmsg+0x43c/0x73c [l2cap]
[  694.270721] LR is at 0xd7017303
...
[  694.525085] Backtrace:
[  694.527587] [<bf266be0>] (l2cap_sock_sendmsg+0x0/0x73c [l2cap]) from [<c02f2cc8>] (sock_sendmsg+0xb8/0xd8)
[  694.537292] [<c02f2c10>] (sock_sendmsg+0x0/0xd8) from [<c02f3044>] (kernel_sendmsg+0x48/0x80)

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index cd8f6ea03841..4ed38272df78 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3078,6 +3078,14 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd
 		break;
 
 	default:
+		/* don't delete l2cap channel if sk is owned by user */
+		if (sock_owned_by_user(sk)) {
+			sk->sk_state = BT_DISCONN;
+			l2cap_sock_clear_timer(sk);
+			l2cap_sock_set_timer(sk, HZ / 5);
+			break;
+		}
+
 		l2cap_chan_del(sk, ECONNREFUSED);
 		break;
 	}
@@ -3283,6 +3291,15 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd
 
 	sk->sk_shutdown = SHUTDOWN_MASK;
 
+	/* don't delete l2cap channel if sk is owned by user */
+	if (sock_owned_by_user(sk)) {
+		sk->sk_state = BT_DISCONN;
+		l2cap_sock_clear_timer(sk);
+		l2cap_sock_set_timer(sk, HZ / 5);
+		bh_unlock_sock(sk);
+		return 0;
+	}
+
 	l2cap_chan_del(sk, ECONNRESET);
 	bh_unlock_sock(sk);
 
@@ -3305,6 +3322,15 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd
 	if (!sk)
 		return 0;
 
+	/* don't delete l2cap channel if sk is owned by user */
+	if (sock_owned_by_user(sk)) {
+		sk->sk_state = BT_DISCONN;
+		l2cap_sock_clear_timer(sk);
+		l2cap_sock_set_timer(sk, HZ / 5);
+		bh_unlock_sock(sk);
+		return 0;
+	}
+
 	l2cap_chan_del(sk, 0);
 	bh_unlock_sock(sk);
 
-- 
cgit v1.2.1


From 940a9eea80946b64b96bd8af1fc71b30c602d057 Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 3 Nov 2010 12:32:45 +0200
Subject: Bluetooth: timer check sk is not owned before freeing

In timer context we might delete l2cap channel used by krfcommd.
The check makes sure that sk is not owned. If sk is owned we
restart timer for HZ/5.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 4ed38272df78..18a802cc0469 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -83,6 +83,18 @@ static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
 static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb);
 
 /* ---- L2CAP timers ---- */
+static void l2cap_sock_set_timer(struct sock *sk, long timeout)
+{
+	BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout);
+	sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
+}
+
+static void l2cap_sock_clear_timer(struct sock *sk)
+{
+	BT_DBG("sock %p state %d", sk, sk->sk_state);
+	sk_stop_timer(sk, &sk->sk_timer);
+}
+
 static void l2cap_sock_timeout(unsigned long arg)
 {
 	struct sock *sk = (struct sock *) arg;
@@ -92,6 +104,14 @@ static void l2cap_sock_timeout(unsigned long arg)
 
 	bh_lock_sock(sk);
 
+	if (sock_owned_by_user(sk)) {
+		/* sk is owned by user. Try again later */
+		l2cap_sock_set_timer(sk, HZ / 5);
+		bh_unlock_sock(sk);
+		sock_put(sk);
+		return;
+	}
+
 	if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG)
 		reason = ECONNREFUSED;
 	else if (sk->sk_state == BT_CONNECT &&
@@ -108,18 +128,6 @@ static void l2cap_sock_timeout(unsigned long arg)
 	sock_put(sk);
 }
 
-static void l2cap_sock_set_timer(struct sock *sk, long timeout)
-{
-	BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout);
-	sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
-}
-
-static void l2cap_sock_clear_timer(struct sock *sk)
-{
-	BT_DBG("sock %p state %d", sk, sk->sk_state);
-	sk_stop_timer(sk, &sk->sk_timer);
-}
-
 /* ---- L2CAP channels ---- */
 static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
 {
-- 
cgit v1.2.1


From cc11b9c14da4ca1c545b424dae2ae8fb1ab04063 Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Mon, 22 Nov 2010 13:21:37 +0200
Subject: Bluetooth: do not use assignment in if condition

Fix checkpatch errors like:
"ERROR: do not use assignment in if condition"
Simplify code and fix one long line.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hci_event.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 4165895049b3..3c1957c82b61 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -996,12 +996,14 @@ static inline void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *sk
 
 		hci_dev_lock(hdev);
 
-		if ((ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr)))
+		ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+		if (ie)
 			memcpy(ie->data.dev_class, ev->dev_class, 3);
 
 		conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
 		if (!conn) {
-			if (!(conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr))) {
+			conn = hci_conn_add(hdev, ev->link_type, &ev->bdaddr);
+			if (!conn) {
 				BT_ERR("No memory for new connection");
 				hci_dev_unlock(hdev);
 				return;
@@ -1608,7 +1610,8 @@ static inline void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *sk
 	if (conn && !ev->status) {
 		struct inquiry_entry *ie;
 
-		if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst))) {
+		ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+		if (ie) {
 			ie->data.clock_offset = ev->clock_offset;
 			ie->timestamp = jiffies;
 		}
@@ -1642,7 +1645,8 @@ static inline void hci_pscan_rep_mode_evt(struct hci_dev *hdev, struct sk_buff *
 
 	hci_dev_lock(hdev);
 
-	if ((ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr))) {
+	ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+	if (ie) {
 		ie->data.pscan_rep_mode = ev->pscan_rep_mode;
 		ie->timestamp = jiffies;
 	}
@@ -1713,7 +1717,8 @@ static inline void hci_remote_ext_features_evt(struct hci_dev *hdev, struct sk_b
 	if (!ev->status && ev->page == 0x01) {
 		struct inquiry_entry *ie;
 
-		if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst)))
+		ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+		if (ie)
 			ie->data.ssp_mode = (ev->features[0] & 0x01);
 
 		conn->ssp_mode = (ev->features[0] & 0x01);
@@ -1886,7 +1891,8 @@ static inline void hci_remote_host_features_evt(struct hci_dev *hdev, struct sk_
 
 	hci_dev_lock(hdev);
 
-	if ((ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr)))
+	ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
+	if (ie)
 		ie->data.ssp_mode = (ev->features[0] & 0x01);
 
 	hci_dev_unlock(hdev);
-- 
cgit v1.2.1


From e0f0cb56364958223f0cb1f1b0b0eecf1b8dcb95 Mon Sep 17 00:00:00 2001
From: "Gustavo F. Padovan" <padovan@profusion.mobi>
Date: Mon, 1 Nov 2010 18:43:53 +0000
Subject: Bluetooth: Get rid of __l2cap_get_sock_by_psm()

l2cap_get_sock_by_psm() was the only user of this function, so I merged
both into l2cap_get_sock_by_psm(). The socket lock now should be hold
outside of l2cap_get_sock_by_psm() once we hold and release it inside the
same function now.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 18a802cc0469..12b4aa2f8fc9 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -751,11 +751,13 @@ found:
 /* Find socket with psm and source bdaddr.
  * Returns closest match.
  */
-static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
+static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
 {
 	struct sock *sk = NULL, *sk1 = NULL;
 	struct hlist_node *node;
 
+	read_lock(&l2cap_sk_list.lock);
+
 	sk_for_each(sk, node, &l2cap_sk_list.head) {
 		if (state && sk->sk_state != state)
 			continue;
@@ -770,20 +772,10 @@ static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src
 				sk1 = sk;
 		}
 	}
-	return node ? sk : sk1;
-}
 
-/* Find socket with given address (psm, src).
- * Returns locked socket */
-static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
-{
-	struct sock *s;
-	read_lock(&l2cap_sk_list.lock);
-	s = __l2cap_get_sock_by_psm(state, psm, src);
-	if (s)
-		bh_lock_sock(s);
 	read_unlock(&l2cap_sk_list.lock);
-	return s;
+
+	return node ? sk : sk1;
 }
 
 static void l2cap_sock_destruct(struct sock *sk)
@@ -2934,6 +2926,8 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
 		goto sendresp;
 	}
 
+	bh_lock_sock(parent);
+
 	/* Check if the ACL is secure enough (if not SDP) */
 	if (psm != cpu_to_le16(0x0001) &&
 				!hci_conn_check_link_mode(conn->hcon)) {
@@ -4464,6 +4458,8 @@ static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, str
 	if (!sk)
 		goto drop;
 
+	bh_lock_sock(sk);
+
 	BT_DBG("sk %p, len %d", sk, skb->len);
 
 	if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
-- 
cgit v1.2.1


From eeb366564be7c311b31c70821d18a43a8a57f9bc Mon Sep 17 00:00:00 2001
From: "Gustavo F. Padovan" <padovan@profusion.mobi>
Date: Mon, 1 Nov 2010 18:43:53 +0000
Subject: Bluetooth: Get rid of __rfcomm_get_sock_by_channel()

rfcomm_get_sock_by_channel() was the only user of this function, so I merged
both into rfcomm_get_sock_by_channel(). The socket lock now should be hold
outside of rfcomm_get_sock_by_channel() once we hold and release it inside the
same function now.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/rfcomm/sock.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index aec505f934df..0207bd6dbfc5 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -140,11 +140,13 @@ static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
 /* Find socket with channel and source bdaddr.
  * Returns closest match.
  */
-static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
+static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
 {
 	struct sock *sk = NULL, *sk1 = NULL;
 	struct hlist_node *node;
 
+	read_lock(&rfcomm_sk_list.lock);
+
 	sk_for_each(sk, node, &rfcomm_sk_list.head) {
 		if (state && sk->sk_state != state)
 			continue;
@@ -159,19 +161,10 @@ static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t
 				sk1 = sk;
 		}
 	}
-	return node ? sk : sk1;
-}
 
-/* Find socket with given address (channel, src).
- * Returns locked socket */
-static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
-{
-	struct sock *s;
-	read_lock(&rfcomm_sk_list.lock);
-	s = __rfcomm_get_sock_by_channel(state, channel, src);
-	if (s) bh_lock_sock(s);
 	read_unlock(&rfcomm_sk_list.lock);
-	return s;
+
+	return node ? sk : sk1;
 }
 
 static void rfcomm_sock_destruct(struct sock *sk)
@@ -945,6 +938,8 @@ int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc *
 	if (!parent)
 		return 0;
 
+	bh_lock_sock(parent);
+
 	/* Check for backlog size */
 	if (sk_acceptq_is_full(parent)) {
 		BT_DBG("backlog full %d", parent->sk_ack_backlog);
-- 
cgit v1.2.1


From b78d7b4f204a6ba1901af36c95e10fded9816054 Mon Sep 17 00:00:00 2001
From: Anderson Lizardo <anderson.lizardo@openbossa.org>
Date: Mon, 29 Nov 2010 12:15:50 -0400
Subject: Bluetooth: Fix error handling for l2cap_init()

create_singlethread_workqueue() may fail with errors such as -ENOMEM. If
this happens, the return value is not set to a negative value and the
module load will succeed. It will then crash on module unload because of
a destroy_workqueue() call on a NULL pointer.

Additionally, the _busy_wq workqueue is not being destroyed if any
errors happen on l2cap_init().

Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 12b4aa2f8fc9..a1c7ae88dd1f 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -4871,8 +4871,10 @@ static int __init l2cap_init(void)
 		return err;
 
 	_busy_wq = create_singlethread_workqueue("l2cap");
-	if (!_busy_wq)
-		goto error;
+	if (!_busy_wq) {
+		proto_unregister(&l2cap_proto);
+		return -ENOMEM;
+	}
 
 	err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
 	if (err < 0) {
@@ -4900,6 +4902,7 @@ static int __init l2cap_init(void)
 	return 0;
 
 error:
+	destroy_workqueue(_busy_wq);
 	proto_unregister(&l2cap_proto);
 	return err;
 }
-- 
cgit v1.2.1


From 735cbc4784a084b7a76c43c69f9dba683bb3b48b Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 1 Dec 2010 16:58:22 +0200
Subject: Bluetooth: clean up sco code

Do not use assignments in IF condition, remove extra spaces

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/sco.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 66b9e5c0523a..960c6d1637da 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -44,7 +44,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -52,7 +52,7 @@
 
 #define VERSION "0.6"
 
-static int disable_esco = 0;
+static int disable_esco;
 
 static const struct proto_ops sco_sock_ops;
 
@@ -138,16 +138,17 @@ static inline struct sock *sco_chan_get(struct sco_conn *conn)
 
 static int sco_conn_del(struct hci_conn *hcon, int err)
 {
-	struct sco_conn *conn;
+	struct sco_conn *conn = hcon->sco_data;
 	struct sock *sk;
 
-	if (!(conn = hcon->sco_data))
+	if (!conn)
 		return 0;
 
 	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
 
 	/* Kill socket */
-	if ((sk = sco_chan_get(conn))) {
+	sk = sco_chan_get(conn);
+	if (sk) {
 		bh_lock_sock(sk);
 		sco_sock_clear_timer(sk);
 		sco_chan_del(sk, err);
@@ -185,7 +186,8 @@ static int sco_connect(struct sock *sk)
 
 	BT_DBG("%s -> %s", batostr(src), batostr(dst));
 
-	if (!(hdev = hci_get_route(dst, src)))
+	hdev = hci_get_route(dst, src);
+	if (!hdev)
 		return -EHOSTUNREACH;
 
 	hci_dev_lock_bh(hdev);
@@ -510,7 +512,8 @@ static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen
 	/* Set destination address and psm */
 	bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr);
 
-	if ((err = sco_connect(sk)))
+	err = sco_connect(sk);
+	if (err)
 		goto done;
 
 	err = bt_sock_wait_state(sk, BT_CONNECTED,
@@ -828,13 +831,14 @@ static void sco_chan_del(struct sock *sk, int err)
 
 static void sco_conn_ready(struct sco_conn *conn)
 {
-	struct sock *parent, *sk;
+	struct sock *parent;
+	struct sock *sk = conn->sk;
 
 	BT_DBG("conn %p", conn);
 
 	sco_conn_lock(conn);
 
-	if ((sk = conn->sk)) {
+	if (sk) {
 		sco_sock_clear_timer(sk);
 		bh_lock_sock(sk);
 		sk->sk_state = BT_CONNECTED;
-- 
cgit v1.2.1


From 285b4e90318dcf421a00b2ac3fe8ab713f3281e3 Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 1 Dec 2010 16:58:23 +0200
Subject: Bluetooth: clean up rfcomm code

Remove extra spaces, assignments in if statement, zeroing static
variables, extra braces. Fix includes.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/rfcomm/core.c |  8 ++++----
 net/bluetooth/rfcomm/sock.c |  5 +++--
 net/bluetooth/rfcomm/tty.c  | 28 ++++++++++++++++------------
 3 files changed, 23 insertions(+), 18 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index fa642aa652bd..c1e2bbafb549 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -41,7 +41,7 @@
 #include <linux/slab.h>
 
 #include <net/sock.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -51,10 +51,10 @@
 
 #define VERSION "1.11"
 
-static int disable_cfc = 0;
+static int disable_cfc;
+static int l2cap_ertm;
 static int channel_mtu = -1;
 static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
-static int l2cap_ertm = 0;
 
 static struct task_struct *rfcomm_thread;
 
@@ -1901,7 +1901,7 @@ static inline void rfcomm_check_connection(struct rfcomm_session *s)
 
 	BT_DBG("%p state %ld", s, s->state);
 
-	switch(sk->sk_state) {
+	switch (sk->sk_state) {
 	case BT_CONNECTED:
 		s->state = BT_CONNECT;
 
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 0207bd6dbfc5..66cc1f0c3df8 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -45,7 +45,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -888,7 +888,8 @@ static int rfcomm_sock_shutdown(struct socket *sock, int how)
 
 	BT_DBG("sock %p, sk %p", sock, sk);
 
-	if (!sk) return 0;
+	if (!sk)
+		return 0;
 
 	lock_sock(sk);
 	if (!sk->sk_shutdown) {
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index a9b81f5dacd1..2575c2db6404 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -58,9 +58,9 @@ struct rfcomm_dev {
 
 	bdaddr_t		src;
 	bdaddr_t		dst;
-	u8 			channel;
+	u8			channel;
 
-	uint 			modem_status;
+	uint			modem_status;
 
 	struct rfcomm_dlc	*dlc;
 	struct tty_struct	*tty;
@@ -69,7 +69,7 @@ struct rfcomm_dev {
 
 	struct device		*tty_dev;
 
-	atomic_t 		wmem_alloc;
+	atomic_t		wmem_alloc;
 
 	struct sk_buff_head	pending;
 };
@@ -431,7 +431,8 @@ static int rfcomm_release_dev(void __user *arg)
 
 	BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags);
 
-	if (!(dev = rfcomm_dev_get(req.dev_id)))
+	dev = rfcomm_dev_get(req.dev_id);
+	if (!dev)
 		return -ENODEV;
 
 	if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) {
@@ -470,7 +471,8 @@ static int rfcomm_get_dev_list(void __user *arg)
 
 	size = sizeof(*dl) + dev_num * sizeof(*di);
 
-	if (!(dl = kmalloc(size, GFP_KERNEL)))
+	dl = kmalloc(size, GFP_KERNEL);
+	if (!dl)
 		return -ENOMEM;
 
 	di = dl->dev_info;
@@ -513,7 +515,8 @@ static int rfcomm_get_dev_info(void __user *arg)
 	if (copy_from_user(&di, arg, sizeof(di)))
 		return -EFAULT;
 
-	if (!(dev = rfcomm_dev_get(di.id)))
+	dev = rfcomm_dev_get(di.id);
+	if (!dev)
 		return -ENODEV;
 
 	di.flags   = dev->flags;
@@ -561,7 +564,8 @@ static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb)
 		return;
 	}
 
-	if (!(tty = dev->tty) || !skb_queue_empty(&dev->pending)) {
+	tty = dev->tty;
+	if (!tty || !skb_queue_empty(&dev->pending)) {
 		skb_queue_tail(&dev->pending, skb);
 		return;
 	}
@@ -796,7 +800,8 @@ static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, in
 
 		memcpy(skb_put(skb, size), buf + sent, size);
 
-		if ((err = rfcomm_dlc_send(dlc, skb)) < 0) {
+		err = rfcomm_dlc_send(dlc, skb);
+		if (err < 0) {
 			kfree_skb(skb);
 			break;
 		}
@@ -892,7 +897,7 @@ static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 
 	/* Parity on/off and when on, odd/even */
 	if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) ||
-			((old->c_cflag & PARODD) != (new->c_cflag & PARODD)) ) {
+			((old->c_cflag & PARODD) != (new->c_cflag & PARODD))) {
 		changes |= RFCOMM_RPN_PM_PARITY;
 		BT_DBG("Parity change detected.");
 	}
@@ -937,11 +942,10 @@ static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 	/* POSIX does not support 1.5 stop bits and RFCOMM does not
 	 * support 2 stop bits. So a request for 2 stop bits gets
 	 * translated to 1.5 stop bits */
-	if (new->c_cflag & CSTOPB) {
+	if (new->c_cflag & CSTOPB)
 		stop_bits = RFCOMM_RPN_STOP_15;
-	} else {
+	else
 		stop_bits = RFCOMM_RPN_STOP_1;
-	}
 
 	/* Handle number of data bits [5-8] */
 	if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE))
-- 
cgit v1.2.1


From 894718a6be69d8cfd191dc291b42be32a1e4851b Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 1 Dec 2010 16:58:24 +0200
Subject: Bluetooth: clean up l2cap code

Do not initialize static vars to zero, macros with complex values
shall be enclosed with (), remove unneeded braces.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index a1c7ae88dd1f..c12eccfdfe01 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -57,7 +57,7 @@
 
 #define VERSION "2.15"
 
-static int disable_ertm = 0;
+static int disable_ertm;
 
 static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN;
 static u8 l2cap_fixed_chan[8] = { 0x02, };
@@ -4162,11 +4162,10 @@ static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control)
 			__mod_retrans_timer();
 
 		pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
-		if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
+		if (pi->conn_state & L2CAP_CONN_SREJ_SENT)
 			l2cap_send_ack(pi);
-		} else {
+		else
 			l2cap_ertm_send(sk);
-		}
 	}
 }
 
-- 
cgit v1.2.1


From 70f23020e6d89155504b5b39f22505f4aec6fa6f Mon Sep 17 00:00:00 2001
From: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Date: Wed, 1 Dec 2010 16:58:25 +0200
Subject: Bluetooth: clean up hci code

Do not use assignment in IF condition, remove extra spaces,
fixing typos, simplify code.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/hci_conn.c  | 23 +++++++++++------
 net/bluetooth/hci_core.c  | 66 ++++++++++++++++++++++++++++++-----------------
 net/bluetooth/hci_event.c |  8 +++---
 net/bluetooth/hci_sock.c  | 17 +++++++-----
 4 files changed, 73 insertions(+), 41 deletions(-)

(limited to 'net/bluetooth')

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 0b1e460fe440..6b90a4191734 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -39,7 +39,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -66,7 +66,8 @@ void hci_acl_connect(struct hci_conn *conn)
 	bacpy(&cp.bdaddr, &conn->dst);
 	cp.pscan_rep_mode = 0x02;
 
-	if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst))) {
+	ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+	if (ie) {
 		if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
 			cp.pscan_rep_mode = ie->data.pscan_rep_mode;
 			cp.pscan_mode     = ie->data.pscan_mode;
@@ -368,8 +369,10 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8
 
 	BT_DBG("%s dst %s", hdev->name, batostr(dst));
 
-	if (!(acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst))) {
-		if (!(acl = hci_conn_add(hdev, ACL_LINK, dst)))
+	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	if (!acl) {
+		acl = hci_conn_add(hdev, ACL_LINK, dst);
+		if (!acl)
 			return NULL;
 	}
 
@@ -389,8 +392,10 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8
 	if (type == ACL_LINK)
 		return acl;
 
-	if (!(sco = hci_conn_hash_lookup_ba(hdev, type, dst))) {
-		if (!(sco = hci_conn_add(hdev, type, dst))) {
+	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+	if (!sco) {
+		sco = hci_conn_add(hdev, type, dst);
+		if (!sco) {
 			hci_conn_put(acl);
 			return NULL;
 		}
@@ -647,10 +652,12 @@ int hci_get_conn_list(void __user *arg)
 
 	size = sizeof(req) + req.conn_num * sizeof(*ci);
 
-	if (!(cl = kmalloc(size, GFP_KERNEL)))
+	cl = kmalloc(size, GFP_KERNEL);
+	if (!cl)
 		return -ENOMEM;
 
-	if (!(hdev = hci_dev_get(req.dev_id))) {
+	hdev = hci_dev_get(req.dev_id);
+	if (!hdev) {
 		kfree(cl);
 		return -ENODEV;
 	}
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index bc2a052e518b..51c61f75a797 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -44,7 +44,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -349,20 +349,23 @@ struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *b
 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
 {
 	struct inquiry_cache *cache = &hdev->inq_cache;
-	struct inquiry_entry *e;
+	struct inquiry_entry *ie;
 
 	BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
 
-	if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) {
+	ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
+	if (!ie) {
 		/* Entry not in the cache. Add new one. */
-		if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC)))
+		ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
+		if (!ie)
 			return;
-		e->next     = cache->list;
-		cache->list = e;
+
+		ie->next = cache->list;
+		cache->list = ie;
 	}
 
-	memcpy(&e->data, data, sizeof(*data));
-	e->timestamp = jiffies;
+	memcpy(&ie->data, data, sizeof(*data));
+	ie->timestamp = jiffies;
 	cache->timestamp = jiffies;
 }
 
@@ -422,16 +425,20 @@ int hci_inquiry(void __user *arg)
 
 	hci_dev_lock_bh(hdev);
 	if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
-					inquiry_cache_empty(hdev) ||
-					ir.flags & IREQ_CACHE_FLUSH) {
+				inquiry_cache_empty(hdev) ||
+				ir.flags & IREQ_CACHE_FLUSH) {
 		inquiry_cache_flush(hdev);
 		do_inquiry = 1;
 	}
 	hci_dev_unlock_bh(hdev);
 
 	timeo = ir.length * msecs_to_jiffies(2000);
-	if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0)
-		goto done;
+
+	if (do_inquiry) {
+		err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
+		if (err < 0)
+			goto done;
+	}
 
 	/* for unlimited number of responses we will use buffer with 255 entries */
 	max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
@@ -439,7 +446,8 @@ int hci_inquiry(void __user *arg)
 	/* cache_dump can't sleep. Therefore we allocate temp buffer and then
 	 * copy it to the user space.
 	 */
-	if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) {
+	buf = kmalloc(sizeof(struct inquiry_info) *max_rsp, GFP_KERNEL);
+	if (!buf) {
 		err = -ENOMEM;
 		goto done;
 	}
@@ -611,7 +619,8 @@ int hci_dev_close(__u16 dev)
 	struct hci_dev *hdev;
 	int err;
 
-	if (!(hdev = hci_dev_get(dev)))
+	hdev = hci_dev_get(dev);
+	if (!hdev)
 		return -ENODEV;
 	err = hci_dev_do_close(hdev);
 	hci_dev_put(hdev);
@@ -623,7 +632,8 @@ int hci_dev_reset(__u16 dev)
 	struct hci_dev *hdev;
 	int ret = 0;
 
-	if (!(hdev = hci_dev_get(dev)))
+	hdev = hci_dev_get(dev);
+	if (!hdev)
 		return -ENODEV;
 
 	hci_req_lock(hdev);
@@ -663,7 +673,8 @@ int hci_dev_reset_stat(__u16 dev)
 	struct hci_dev *hdev;
 	int ret = 0;
 
-	if (!(hdev = hci_dev_get(dev)))
+	hdev = hci_dev_get(dev);
+	if (!hdev)
 		return -ENODEV;
 
 	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
@@ -682,7 +693,8 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
 	if (copy_from_user(&dr, arg, sizeof(dr)))
 		return -EFAULT;
 
-	if (!(hdev = hci_dev_get(dr.dev_id)))
+	hdev = hci_dev_get(dr.dev_id);
+	if (!hdev)
 		return -ENODEV;
 
 	switch (cmd) {
@@ -763,7 +775,8 @@ int hci_get_dev_list(void __user *arg)
 
 	size = sizeof(*dl) + dev_num * sizeof(*dr);
 
-	if (!(dl = kzalloc(size, GFP_KERNEL)))
+	dl = kzalloc(size, GFP_KERNEL);
+	if (!dl)
 		return -ENOMEM;
 
 	dr = dl->dev_req;
@@ -797,7 +810,8 @@ int hci_get_dev_info(void __user *arg)
 	if (copy_from_user(&di, arg, sizeof(di)))
 		return -EFAULT;
 
-	if (!(hdev = hci_dev_get(di.dev_id)))
+	hdev = hci_dev_get(di.dev_id);
+	if (!hdev)
 		return -ENODEV;
 
 	strcpy(di.name, hdev->name);
@@ -905,7 +919,7 @@ int hci_register_dev(struct hci_dev *hdev)
 	hdev->sniff_max_interval = 800;
 	hdev->sniff_min_interval = 80;
 
-	tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev);
+	tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
 	tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
 	tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
 
@@ -1368,7 +1382,8 @@ void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
 	bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
 	hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
 
-	if (!(list = skb_shinfo(skb)->frag_list)) {
+	list = skb_shinfo(skb)->frag_list;
+	if (!list) {
 		/* Non fragmented */
 		BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
 
@@ -1609,7 +1624,8 @@ static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
 		hci_conn_enter_active_mode(conn);
 
 		/* Send to upper protocol */
-		if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) {
+		hp = hci_proto[HCI_PROTO_L2CAP];
+		if (hp && hp->recv_acldata) {
 			hp->recv_acldata(conn, skb, flags);
 			return;
 		}
@@ -1644,7 +1660,8 @@ static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
 		register struct hci_proto *hp;
 
 		/* Send to upper protocol */
-		if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) {
+		hp = hci_proto[HCI_PROTO_SCO];
+		if (hp && hp->recv_scodata) {
 			hp->recv_scodata(conn, skb);
 			return;
 		}
@@ -1727,7 +1744,8 @@ static void hci_cmd_task(unsigned long arg)
 	if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
 		kfree_skb(hdev->sent_cmd);
 
-		if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) {
+		hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
+		if (hdev->sent_cmd) {
 			atomic_dec(&hdev->cmd_cnt);
 			hci_send_frame(skb);
 			hdev->cmd_last_tx = jiffies;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 3c1957c82b61..8923b36a67a2 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -39,7 +39,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -1512,10 +1512,12 @@ static inline void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *s
 			conn->sent -= count;
 
 			if (conn->type == ACL_LINK) {
-				if ((hdev->acl_cnt += count) > hdev->acl_pkts)
+				hdev->acl_cnt += count;
+				if (hdev->acl_cnt > hdev->acl_pkts)
 					hdev->acl_cnt = hdev->acl_pkts;
 			} else {
-				if ((hdev->sco_cnt += count) > hdev->sco_pkts)
+				hdev->sco_cnt += count;
+				if (hdev->sco_cnt > hdev->sco_pkts)
 					hdev->sco_cnt = hdev->sco_pkts;
 			}
 		}
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 83acd164d39e..b3753bad2a55 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -43,7 +43,7 @@
 #include <net/sock.h>
 
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -125,7 +125,8 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
 				continue;
 		}
 
-		if (!(nskb = skb_clone(skb, GFP_ATOMIC)))
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
 			continue;
 
 		/* Put type byte before the data */
@@ -370,7 +371,8 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_le
 	}
 
 	if (haddr->hci_dev != HCI_DEV_NONE) {
-		if (!(hdev = hci_dev_get(haddr->hci_dev))) {
+		hdev = hci_dev_get(haddr->hci_dev);
+		if (!hdev) {
 			err = -ENODEV;
 			goto done;
 		}
@@ -457,7 +459,8 @@ static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	if (sk->sk_state == BT_CLOSED)
 		return 0;
 
-	if (!(skb = skb_recv_datagram(sk, flags, noblock, &err)))
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (!skb)
 		return err;
 
 	msg->msg_namelen = 0;
@@ -499,7 +502,8 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 
 	lock_sock(sk);
 
-	if (!(hdev = hci_pi(sk)->hdev)) {
+	hdev = hci_pi(sk)->hdev;
+	if (!hdev) {
 		err = -EBADFD;
 		goto done;
 	}
@@ -509,7 +513,8 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 		goto done;
 	}
 
-	if (!(skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err)))
+	skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
 		goto done;
 
 	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
-- 
cgit v1.2.1