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-rw-r--r--net/bluetooth/6lowpan.c1
-rw-r--r--net/bluetooth/af_bluetooth.c4
-rw-r--r--net/bluetooth/hci_conn.c86
-rw-r--r--net/bluetooth/hci_core.c19
-rw-r--r--net/bluetooth/hci_event.c47
-rw-r--r--net/bluetooth/hci_sock.c51
-rw-r--r--net/bluetooth/hci_sysfs.c23
-rw-r--r--net/bluetooth/hidp/core.c2
-rw-r--r--net/bluetooth/l2cap_core.c70
-rw-r--r--net/bluetooth/l2cap_sock.c10
-rw-r--r--net/bluetooth/rfcomm/core.c2
11 files changed, 190 insertions, 125 deletions
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 9a75f9b00b51..4530ffb2481a 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -1014,6 +1014,7 @@ static int get_l2cap_conn(char *buf, bdaddr_t *addr, u8 *addr_type,
hci_dev_lock(hdev);
hcon = hci_conn_hash_lookup_le(hdev, addr, *addr_type);
hci_dev_unlock(hdev);
+ hci_dev_put(hdev);
if (!hcon)
return -ENOENT;
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index ee60c30f3be2..798f8f485e5a 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -743,7 +743,7 @@ static int __init bt_init(void)
err = bt_sysfs_init();
if (err < 0)
- return err;
+ goto cleanup_led;
err = sock_register(&bt_sock_family_ops);
if (err)
@@ -779,6 +779,8 @@ unregister_socket:
sock_unregister(PF_BLUETOOTH);
cleanup_sysfs:
bt_sysfs_cleanup();
+cleanup_led:
+ bt_leds_cleanup();
return err;
}
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 1b50e4ef2c68..b8730c5f1cac 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -125,13 +125,11 @@ static void hci_conn_cleanup(struct hci_conn *conn)
if (hdev->notify)
hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
- hci_conn_del_sysfs(conn);
-
debugfs_remove_recursive(conn->debugfs);
- hci_dev_put(hdev);
+ hci_conn_del_sysfs(conn);
- hci_conn_put(conn);
+ hci_dev_put(hdev);
}
static void le_scan_cleanup(struct work_struct *work)
@@ -1204,6 +1202,15 @@ struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
return ERR_PTR(-EOPNOTSUPP);
}
+ /* Reject outgoing connection to device with same BD ADDR against
+ * CVE-2020-26555
+ */
+ if (!bacmp(&hdev->bdaddr, dst)) {
+ bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
+ dst);
+ return ERR_PTR(-ECONNREFUSED);
+ }
+
acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
if (!acl) {
acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
@@ -1331,12 +1338,10 @@ static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
sizeof(cp), &cp);
- /* If we're already encrypted set the REAUTH_PEND flag,
- * otherwise set the ENCRYPT_PEND.
+ /* Set the ENCRYPT_PEND to trigger encryption after
+ * authentication.
*/
- if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
- set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
- else
+ if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
}
@@ -1379,34 +1384,41 @@ int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
if (!test_bit(HCI_CONN_AUTH, &conn->flags))
goto auth;
- /* An authenticated FIPS approved combination key has sufficient
- * security for security level 4. */
- if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
- sec_level == BT_SECURITY_FIPS)
- goto encrypt;
-
- /* An authenticated combination key has sufficient security for
- security level 3. */
- if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
- conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
- sec_level == BT_SECURITY_HIGH)
- goto encrypt;
-
- /* An unauthenticated combination key has sufficient security for
- security level 1 and 2. */
- if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
- conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
- (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
- goto encrypt;
-
- /* A combination key has always sufficient security for the security
- levels 1 or 2. High security level requires the combination key
- is generated using maximum PIN code length (16).
- For pre 2.1 units. */
- if (conn->key_type == HCI_LK_COMBINATION &&
- (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
- conn->pin_length == 16))
- goto encrypt;
+ switch (conn->key_type) {
+ case HCI_LK_AUTH_COMBINATION_P256:
+ /* An authenticated FIPS approved combination key has
+ * sufficient security for security level 4 or lower.
+ */
+ if (sec_level <= BT_SECURITY_FIPS)
+ goto encrypt;
+ break;
+ case HCI_LK_AUTH_COMBINATION_P192:
+ /* An authenticated combination key has sufficient security for
+ * security level 3 or lower.
+ */
+ if (sec_level <= BT_SECURITY_HIGH)
+ goto encrypt;
+ break;
+ case HCI_LK_UNAUTH_COMBINATION_P192:
+ case HCI_LK_UNAUTH_COMBINATION_P256:
+ /* An unauthenticated combination key has sufficient security
+ * for security level 2 or lower.
+ */
+ if (sec_level <= BT_SECURITY_MEDIUM)
+ goto encrypt;
+ break;
+ case HCI_LK_COMBINATION:
+ /* A combination key has always sufficient security for the
+ * security levels 2 or lower. High security level requires the
+ * combination key is generated using maximum PIN code length
+ * (16). For pre 2.1 units.
+ */
+ if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
+ goto encrypt;
+ break;
+ default:
+ break;
+ }
auth:
if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 3d780220e2d1..4d89e38dceec 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1519,6 +1519,7 @@ static int hci_dev_do_open(struct hci_dev *hdev)
hdev->flush(hdev);
if (hdev->sent_cmd) {
+ cancel_delayed_work_sync(&hdev->cmd_timer);
kfree_skb(hdev->sent_cmd);
hdev->sent_cmd = NULL;
}
@@ -2516,10 +2517,10 @@ int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
{
- struct smp_ltk *k;
+ struct smp_ltk *k, *tmp;
int removed = 0;
- list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
+ list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
continue;
@@ -2535,9 +2536,9 @@ int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
{
- struct smp_irk *k;
+ struct smp_irk *k, *tmp;
- list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
+ list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
continue;
@@ -3192,7 +3193,11 @@ int hci_register_dev(struct hci_dev *hdev)
if (id < 0)
return id;
- snprintf(hdev->name, sizeof(hdev->name), "hci%d", id);
+ error = dev_set_name(&hdev->dev, "hci%u", id);
+ if (error)
+ return error;
+
+ hdev->name = dev_name(&hdev->dev);
hdev->id = id;
BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
@@ -3214,8 +3219,6 @@ int hci_register_dev(struct hci_dev *hdev)
if (!IS_ERR_OR_NULL(bt_debugfs))
hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
- dev_set_name(&hdev->dev, "%s", hdev->name);
-
error = device_add(&hdev->dev);
if (error < 0)
goto err_wqueue;
@@ -4331,7 +4334,7 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
else
*req_complete = bt_cb(skb)->hci.req_complete;
- kfree_skb(skb);
+ dev_kfree_skb_irq(skb);
}
spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
}
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index dd7bf437d88e..9d01874e6b93 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -25,6 +25,8 @@
/* Bluetooth HCI event handling. */
#include <asm/unaligned.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -1699,7 +1701,8 @@ static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
return;
}
- set_bit(HCI_INQUIRY, &hdev->flags);
+ if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
+ set_bit(HCI_INQUIRY, &hdev->flags);
}
static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
@@ -2510,6 +2513,16 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
BT_DBG("%s bdaddr %pMR type 0x%x", hdev->name, &ev->bdaddr,
ev->link_type);
+ /* Reject incoming connection from device with same BD ADDR against
+ * CVE-2020-26555
+ */
+ if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
+ bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
+ &ev->bdaddr);
+ hci_reject_conn(hdev, &ev->bdaddr);
+ return;
+ }
+
mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
&flags);
@@ -2709,14 +2722,8 @@ static void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (!ev->status) {
clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
-
- if (!hci_conn_ssp_enabled(conn) &&
- test_bit(HCI_CONN_REAUTH_PEND, &conn->flags)) {
- bt_dev_info(hdev, "re-auth of legacy device is not possible.");
- } else {
- set_bit(HCI_CONN_AUTH, &conn->flags);
- conn->sec_level = conn->pending_sec_level;
- }
+ set_bit(HCI_CONN_AUTH, &conn->flags);
+ conn->sec_level = conn->pending_sec_level;
} else {
if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
@@ -2725,7 +2732,6 @@ static void hci_auth_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
}
clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
- clear_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
if (conn->state == BT_CONFIG) {
if (!ev->status && hci_conn_ssp_enabled(conn)) {
@@ -3816,6 +3822,15 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (!conn)
goto unlock;
+ /* Ignore NULL link key against CVE-2020-26555 */
+ if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
+ bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
+ &ev->bdaddr);
+ hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
+ hci_conn_drop(conn);
+ goto unlock;
+ }
+
hci_conn_hold(conn);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_drop(conn);
@@ -4294,8 +4309,8 @@ static u8 bredr_oob_data_present(struct hci_conn *conn)
* available, then do not declare that OOB data is
* present.
*/
- if (!memcmp(data->rand256, ZERO_KEY, 16) ||
- !memcmp(data->hash256, ZERO_KEY, 16))
+ if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
+ !crypto_memneq(data->hash256, ZERO_KEY, 16))
return 0x00;
return 0x02;
@@ -4305,8 +4320,8 @@ static u8 bredr_oob_data_present(struct hci_conn *conn)
* not supported by the hardware, then check that if
* P-192 data values are present.
*/
- if (!memcmp(data->rand192, ZERO_KEY, 16) ||
- !memcmp(data->hash192, ZERO_KEY, 16))
+ if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
+ !crypto_memneq(data->hash192, ZERO_KEY, 16))
return 0x00;
return 0x01;
@@ -4322,7 +4337,7 @@ static void hci_io_capa_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
- if (!conn)
+ if (!conn || !hci_conn_ssp_enabled(conn))
goto unlock;
hci_conn_hold(conn);
@@ -4557,7 +4572,7 @@ static void hci_simple_pair_complete_evt(struct hci_dev *hdev,
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
- if (!conn)
+ if (!conn || !hci_conn_ssp_enabled(conn))
goto unlock;
/* Reset the authentication requirement to unknown */
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 3ba0c6df73ce..a7e5bca9f7e4 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -430,7 +430,8 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
ni->type = hdev->dev_type;
ni->bus = hdev->bus;
bacpy(&ni->bdaddr, &hdev->bdaddr);
- memcpy(ni->name, hdev->name, 8);
+ memcpy_and_pad(ni->name, sizeof(ni->name), hdev->name,
+ strnlen(hdev->name, sizeof(ni->name)), '\0');
opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
break;
@@ -881,10 +882,6 @@ static int hci_sock_release(struct socket *sock)
}
sock_orphan(sk);
-
- skb_queue_purge(&sk->sk_receive_queue);
- skb_queue_purge(&sk->sk_write_queue);
-
release_sock(sk);
sock_put(sk);
return 0;
@@ -977,6 +974,34 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
BT_DBG("cmd %x arg %lx", cmd, arg);
+ /* Make sure the cmd is valid before doing anything */
+ switch (cmd) {
+ case HCIGETDEVLIST:
+ case HCIGETDEVINFO:
+ case HCIGETCONNLIST:
+ case HCIDEVUP:
+ case HCIDEVDOWN:
+ case HCIDEVRESET:
+ case HCIDEVRESTAT:
+ case HCISETSCAN:
+ case HCISETAUTH:
+ case HCISETENCRYPT:
+ case HCISETPTYPE:
+ case HCISETLINKPOL:
+ case HCISETLINKMODE:
+ case HCISETACLMTU:
+ case HCISETSCOMTU:
+ case HCIINQUIRY:
+ case HCISETRAW:
+ case HCIGETCONNINFO:
+ case HCIGETAUTHINFO:
+ case HCIBLOCKADDR:
+ case HCIUNBLOCKADDR:
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
lock_sock(sk);
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
@@ -993,7 +1018,14 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
if (hci_sock_gen_cookie(sk)) {
struct sk_buff *skb;
- if (capable(CAP_NET_ADMIN))
+ /* Perform careful checks before setting the HCI_SOCK_TRUSTED
+ * flag. Make sure that not only the current task but also
+ * the socket opener has the required capability, since
+ * privileged programs can be tricked into making ioctl calls
+ * on HCI sockets, and the socket should not be marked as
+ * trusted simply because the ioctl caller is privileged.
+ */
+ if (sk_capable(sk, CAP_NET_ADMIN))
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
/* Send event to monitor */
@@ -1985,6 +2017,12 @@ done:
return err;
}
+static void hci_sock_destruct(struct sock *sk)
+{
+ skb_queue_purge(&sk->sk_receive_queue);
+ skb_queue_purge(&sk->sk_write_queue);
+}
+
static const struct proto_ops hci_sock_ops = {
.family = PF_BLUETOOTH,
.owner = THIS_MODULE,
@@ -2035,6 +2073,7 @@ static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
sock->state = SS_UNCONNECTED;
sk->sk_state = BT_OPEN;
+ sk->sk_destruct = hci_sock_destruct;
bt_sock_link(&hci_sk_list, sk);
return 0;
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index ccd2c377bf83..266112c960ee 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -33,7 +33,7 @@ void hci_conn_init_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
- BT_DBG("conn %p", conn);
+ bt_dev_dbg(hdev, "conn %p", conn);
conn->dev.type = &bt_link;
conn->dev.class = bt_class;
@@ -46,27 +46,30 @@ void hci_conn_add_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
- BT_DBG("conn %p", conn);
+ bt_dev_dbg(hdev, "conn %p", conn);
if (device_is_registered(&conn->dev))
return;
dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
- if (device_add(&conn->dev) < 0) {
+ if (device_add(&conn->dev) < 0)
bt_dev_err(hdev, "failed to register connection device");
- return;
- }
-
- hci_dev_hold(hdev);
}
void hci_conn_del_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
- if (!device_is_registered(&conn->dev))
+ bt_dev_dbg(hdev, "conn %p", conn);
+
+ if (!device_is_registered(&conn->dev)) {
+ /* If device_add() has *not* succeeded, use *only* put_device()
+ * to drop the reference count.
+ */
+ put_device(&conn->dev);
return;
+ }
while (1) {
struct device *dev;
@@ -78,9 +81,7 @@ void hci_conn_del_sysfs(struct hci_conn *conn)
put_device(dev);
}
- device_del(&conn->dev);
-
- hci_dev_put(hdev);
+ device_unregister(&conn->dev);
}
static void bt_host_release(struct device *dev)
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 0cbd0bca971f..00dae8e875a2 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -428,7 +428,7 @@ static void hidp_set_timer(struct hidp_session *session)
static void hidp_del_timer(struct hidp_session *session)
{
if (session->idle_to > 0)
- del_timer(&session->timer);
+ del_timer_sync(&session->timer);
}
static void hidp_process_report(struct hidp_session *session, int type,
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index fd6cd47a6c5a..9346fae5d664 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2517,14 +2517,6 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
if (IS_ERR(skb))
return PTR_ERR(skb);
- /* Channel lock is released before requesting new skb and then
- * reacquired thus we need to recheck channel state.
- */
- if (chan->state != BT_CONNECTED) {
- kfree_skb(skb);
- return -ENOTCONN;
- }
-
l2cap_do_send(chan, skb);
return len;
}
@@ -2568,14 +2560,6 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
if (IS_ERR(skb))
return PTR_ERR(skb);
- /* Channel lock is released before requesting new skb and then
- * reacquired thus we need to recheck channel state.
- */
- if (chan->state != BT_CONNECTED) {
- kfree_skb(skb);
- return -ENOTCONN;
- }
-
l2cap_do_send(chan, skb);
err = len;
break;
@@ -2596,14 +2580,6 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
*/
err = l2cap_segment_sdu(chan, &seg_queue, msg, len);
- /* The channel could have been closed while segmenting,
- * check that it is still connected.
- */
- if (chan->state != BT_CONNECTED) {
- __skb_queue_purge(&seg_queue);
- err = -ENOTCONN;
- }
-
if (err)
break;
@@ -4031,6 +4007,10 @@ static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
result = __le16_to_cpu(rsp->result);
status = __le16_to_cpu(rsp->status);
+ if (result == L2CAP_CR_SUCCESS && (dcid < L2CAP_CID_DYN_START ||
+ dcid > L2CAP_CID_DYN_END))
+ return -EPROTO;
+
BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x",
dcid, scid, result, status);
@@ -4062,6 +4042,11 @@ static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
switch (result) {
case L2CAP_CR_SUCCESS:
+ if (__l2cap_get_chan_by_dcid(conn, dcid)) {
+ err = -EBADSLT;
+ break;
+ }
+
l2cap_state_change(chan, BT_CONFIG);
chan->ident = 0;
chan->dcid = dcid;
@@ -4193,7 +4178,8 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
chan->ident = cmd->ident;
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
- chan->num_conf_rsp++;
+ if (chan->num_conf_rsp < L2CAP_CONF_MAX_CONF_RSP)
+ chan->num_conf_rsp++;
/* Reset config buffer. */
chan->conf_len = 0;
@@ -4373,33 +4359,29 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn,
BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid);
- mutex_lock(&conn->chan_lock);
-
- chan = __l2cap_get_chan_by_scid(conn, dcid);
+ chan = l2cap_get_chan_by_scid(conn, dcid);
if (!chan) {
- mutex_unlock(&conn->chan_lock);
cmd_reject_invalid_cid(conn, cmd->ident, dcid, scid);
return 0;
}
- l2cap_chan_hold(chan);
- l2cap_chan_lock(chan);
-
rsp.dcid = cpu_to_le16(chan->scid);
rsp.scid = cpu_to_le16(chan->dcid);
l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);
chan->ops->set_shutdown(chan);
+ l2cap_chan_unlock(chan);
+ mutex_lock(&conn->chan_lock);
+ l2cap_chan_lock(chan);
l2cap_chan_del(chan, ECONNRESET);
+ mutex_unlock(&conn->chan_lock);
chan->ops->close(chan);
l2cap_chan_unlock(chan);
l2cap_chan_put(chan);
- mutex_unlock(&conn->chan_lock);
-
return 0;
}
@@ -4419,33 +4401,28 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn,
BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid);
- mutex_lock(&conn->chan_lock);
-
- chan = __l2cap_get_chan_by_scid(conn, scid);
+ chan = l2cap_get_chan_by_scid(conn, scid);
if (!chan) {
- mutex_unlock(&conn->chan_lock);
return 0;
}
- l2cap_chan_hold(chan);
- l2cap_chan_lock(chan);
-
if (chan->state != BT_DISCONN) {
l2cap_chan_unlock(chan);
l2cap_chan_put(chan);
- mutex_unlock(&conn->chan_lock);
return 0;
}
+ l2cap_chan_unlock(chan);
+ mutex_lock(&conn->chan_lock);
+ l2cap_chan_lock(chan);
l2cap_chan_del(chan, 0);
+ mutex_unlock(&conn->chan_lock);
chan->ops->close(chan);
l2cap_chan_unlock(chan);
l2cap_chan_put(chan);
- mutex_unlock(&conn->chan_lock);
-
return 0;
}
@@ -5728,9 +5705,14 @@ static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
if (!chan)
goto done;
+ chan = l2cap_chan_hold_unless_zero(chan);
+ if (!chan)
+ goto done;
+
l2cap_chan_lock(chan);
l2cap_chan_del(chan, ECONNREFUSED);
l2cap_chan_unlock(chan);
+ l2cap_chan_put(chan);
done:
mutex_unlock(&conn->chan_lock);
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index d938311c58a8..b831e5fe3ebc 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -45,6 +45,7 @@ static const struct proto_ops l2cap_sock_ops;
static void l2cap_sock_init(struct sock *sk, struct sock *parent);
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
int proto, gfp_t prio, int kern);
+static void l2cap_sock_cleanup_listen(struct sock *parent);
bool l2cap_is_socket(struct socket *sock)
{
@@ -1205,6 +1206,7 @@ static int l2cap_sock_release(struct socket *sock)
if (!sk)
return 0;
+ l2cap_sock_cleanup_listen(sk);
bt_sock_unlink(&l2cap_sk_list, sk);
err = l2cap_sock_shutdown(sock, 2);
@@ -1414,6 +1416,14 @@ static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
if (!skb)
return ERR_PTR(err);
+ /* Channel lock is released before requesting new skb and then
+ * reacquired thus we need to recheck channel state.
+ */
+ if (chan->state != BT_CONNECTED) {
+ kfree_skb(skb);
+ return ERR_PTR(-ENOTCONN);
+ }
+
skb->priority = sk->sk_priority;
bt_cb(skb)->l2cap.chan = chan;
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index e4eaf5d2acbd..86edf512d497 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -593,7 +593,7 @@ int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
ret = rfcomm_dlc_send_frag(d, frag);
if (ret < 0) {
- kfree_skb(frag);
+ dev_kfree_skb_irq(frag);
goto unlock;
}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-30 19:52:24 +0000