From dc2a0e20fbc85a71c63aa4330b496fda33f6bf80 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Tue, 20 Nov 2012 23:25:54 -0200 Subject: [PATCH 01/12] Bluetooth: Add missing lock nesting notation This patch fixes the following report, it happens when accepting rfcomm connections: [ 228.165378] ============================================= [ 228.165378] [ INFO: possible recursive locking detected ] [ 228.165378] 3.7.0-rc1-00536-gc1d5dc4 #120 Tainted: G W [ 228.165378] --------------------------------------------- [ 228.165378] bluetoothd/1341 is trying to acquire lock: [ 228.165378] (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+...}, at: [] bt_accept_dequeue+0xa0/0x180 [bluetooth] [ 228.165378] [ 228.165378] but task is already holding lock: [ 228.165378] (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+...}, at: [] rfcomm_sock_accept+0x58/0x2d0 [rfcomm] [ 228.165378] [ 228.165378] other info that might help us debug this: [ 228.165378] Possible unsafe locking scenario: [ 228.165378] [ 228.165378] CPU0 [ 228.165378] ---- [ 228.165378] lock(sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM); [ 228.165378] lock(sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM); [ 228.165378] [ 228.165378] *** DEADLOCK *** [ 228.165378] [ 228.165378] May be due to missing lock nesting notation Cc: stable@vger.kernel.org Signed-off-by: Gustavo Padovan --- net/bluetooth/rfcomm/sock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 4ddef57d03a7..ce3f6658f4b2 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -467,7 +467,7 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f long timeo; int err = 0; - lock_sock(sk); + lock_sock_nested(sk, SINGLE_DEPTH_NESTING); if (sk->sk_type != SOCK_STREAM) { err = -EINVAL; @@ -504,7 +504,7 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f release_sock(sk); timeo = schedule_timeout(timeo); - lock_sock(sk); + lock_sock_nested(sk, SINGLE_DEPTH_NESTING); } __set_current_state(TASK_RUNNING); remove_wait_queue(sk_sleep(sk), &wait); From b9b5ef188e5a2222cfc16ef62a4703080750b451 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Wed, 21 Nov 2012 00:50:21 -0200 Subject: [PATCH 02/12] Bluetooth: cancel power_on work when unregistering the device We need to cancel the hci_power_on work in order to avoid it run when we try to free the hdev. [ 1434.201149] ------------[ cut here ]------------ [ 1434.204998] WARNING: at lib/debugobjects.c:261 debug_print_object+0x8e/0xb0() [ 1434.208324] ODEBUG: free active (active state 0) object type: work_struct hint: hci _power_on+0x0/0x90 [ 1434.210386] Pid: 8564, comm: trinity-child25 Tainted: G W 3.7.0-rc5-next- 20121112-sasha-00018-g2f4ce0e #127 [ 1434.210760] Call Trace: [ 1434.210760] [] ? debug_print_object+0x8e/0xb0 [ 1434.210760] [] warn_slowpath_common+0x87/0xb0 [ 1434.210760] [] warn_slowpath_fmt+0x41/0x50 [ 1434.210760] [] debug_print_object+0x8e/0xb0 [ 1434.210760] [] ? hci_dev_open+0x310/0x310 [ 1434.210760] [] ? _raw_spin_unlock_irqrestore+0x55/0xa0 [ 1434.210760] [] __debug_check_no_obj_freed+0xa5/0x230 [ 1434.210760] [] ? bt_host_release+0x10/0x20 [ 1434.210760] [] debug_check_no_obj_freed+0x15/0x20 [ 1434.210760] [] kfree+0x227/0x330 [ 1434.210760] [] bt_host_release+0x10/0x20 [ 1434.210760] [] device_release+0x65/0xc0 [ 1434.210760] [] kobject_cleanup+0x145/0x190 [ 1434.210760] [] kobject_release+0xd/0x10 [ 1434.210760] [] kobject_put+0x4c/0x60 [ 1434.210760] [] put_device+0x12/0x20 [ 1434.210760] [] hci_free_dev+0x24/0x30 [ 1434.210760] [] vhci_release+0x31/0x60 [ 1434.210760] [] __fput+0x122/0x250 [ 1434.210760] [] ? rcu_user_exit+0x9d/0xd0 [ 1434.210760] [] ____fput+0x9/0x10 [ 1434.210760] [] task_work_run+0xb2/0xf0 [ 1434.210760] [] do_notify_resume+0x77/0xa0 [ 1434.210760] [] int_signal+0x12/0x17 [ 1434.210760] ---[ end trace a6d57fefbc8a8cc7 ]--- Cc: stable@vger.kernel.org Reported-by: Sasha Levin Signed-off-by: Gustavo Padovan --- net/bluetooth/hci_core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 81f4bac098c9..69eb644f0d48 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1854,6 +1854,8 @@ void hci_unregister_dev(struct hci_dev *hdev) for (i = 0; i < NUM_REASSEMBLY; i++) kfree_skb(hdev->reassembly[i]); + cancel_work_sync(&hdev->power_on); + if (!test_bit(HCI_INIT, &hdev->flags) && !test_bit(HCI_SETUP, &hdev->dev_flags)) { hci_dev_lock(hdev); From b96e9c671b05f95126753a22145d4509d45ca197 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Dalleau?= Date: Wed, 21 Nov 2012 10:51:11 +0100 Subject: [PATCH 03/12] Bluetooth: Add BT_DEFER_SETUP option to sco socket MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This option will set the BT_SK_DEFER_SETUP bit in socket flags. Signed-off-by: Frédéric Dalleau Signed-off-by: Gustavo Padovan --- net/bluetooth/sco.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 450cdcd88e5c..c6678f2bffc9 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -666,12 +666,31 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char { struct sock *sk = sock->sk; int err = 0; + u32 opt; BT_DBG("sk %p", sk); lock_sock(sk); switch (optname) { + + case BT_DEFER_SETUP: + if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { + err = -EINVAL; + break; + } + + if (get_user(opt, (u32 __user *) optval)) { + err = -EFAULT; + break; + } + + if (opt) + set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); + else + clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); + break; + default: err = -ENOPROTOOPT; break; @@ -753,6 +772,19 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char lock_sock(sk); switch (optname) { + + case BT_DEFER_SETUP: + if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { + err = -EINVAL; + break; + } + + if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), + (u32 __user *) optval)) + err = -EFAULT; + + break; + default: err = -ENOPROTOOPT; break; From 20714bfef84d3e690c9c6f8e9cd46543b5ae1eed Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Dalleau?= Date: Wed, 21 Nov 2012 10:51:12 +0100 Subject: [PATCH 04/12] Bluetooth: Implement deferred sco socket setup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In order to authenticate and configure an incoming SCO connection, the BT_DEFER_SETUP option was added. This option is intended to defer reply to Connect Request on SCO sockets. When a connection is requested, the listening socket is unblocked but the effective connection setup happens only on first recv. Any send between accept and recv fails with -ENOTCONN. Signed-off-by: Frédéric Dalleau Signed-off-by: Gustavo Padovan --- include/net/bluetooth/hci_core.h | 9 ++++-- net/bluetooth/hci_event.c | 52 +++++++++++++++++++++++++++++--- net/bluetooth/sco.c | 35 +++++++++++++++++++-- 3 files changed, 86 insertions(+), 10 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index ef5b85dac3f7..76891a914e75 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -376,7 +376,7 @@ extern int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt); extern int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags); -extern int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr); +extern int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags); extern void sco_connect_cfm(struct hci_conn *hcon, __u8 status); extern void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason); extern int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb); @@ -577,6 +577,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst); int hci_conn_del(struct hci_conn *conn); void hci_conn_hash_flush(struct hci_dev *hdev); void hci_conn_check_pending(struct hci_dev *hdev); +void hci_conn_accept(struct hci_conn *conn, int mask); struct hci_chan *hci_chan_create(struct hci_conn *conn); void hci_chan_del(struct hci_chan *chan); @@ -779,8 +780,10 @@ void hci_conn_del_sysfs(struct hci_conn *conn); #define lmp_host_le_br_capable(dev) ((dev)->host_features[0] & LMP_HOST_LE_BREDR) /* ----- HCI protocols ----- */ +#define HCI_PROTO_DEFER 0x01 + static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, - __u8 type) + __u8 type, __u8 *flags) { switch (type) { case ACL_LINK: @@ -788,7 +791,7 @@ static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, case SCO_LINK: case ESCO_LINK: - return sco_connect_ind(hdev, bdaddr); + return sco_connect_ind(hdev, bdaddr, flags); default: BT_ERR("unknown link type %d", type); diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 9f5c5f244502..3843f1897c86 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -2047,15 +2047,53 @@ unlock: hci_conn_check_pending(hdev); } +void hci_conn_accept(struct hci_conn *conn, int mask) +{ + struct hci_dev *hdev = conn->hdev; + + BT_DBG("conn %p", conn); + + conn->state = BT_CONFIG; + + if (!lmp_esco_capable(hdev)) { + struct hci_cp_accept_conn_req cp; + + bacpy(&cp.bdaddr, &conn->dst); + + if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER)) + cp.role = 0x00; /* Become master */ + else + cp.role = 0x01; /* Remain slave */ + + hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); + } else /* lmp_esco_capable(hdev)) */ { + struct hci_cp_accept_sync_conn_req cp; + + bacpy(&cp.bdaddr, &conn->dst); + cp.pkt_type = cpu_to_le16(conn->pkt_type); + + cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40); + cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40); + cp.max_latency = __constant_cpu_to_le16(0xffff); + cp.content_format = cpu_to_le16(hdev->voice_setting); + cp.retrans_effort = 0xff; + + hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, + sizeof(cp), &cp); + } +} + static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb) { struct hci_ev_conn_request *ev = (void *) skb->data; int mask = hdev->link_mode; + __u8 flags = 0; BT_DBG("%s bdaddr %pMR type 0x%x", hdev->name, &ev->bdaddr, ev->link_type); - mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type); + mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type, + &flags); if ((mask & HCI_LM_ACCEPT) && !hci_blacklist_lookup(hdev, &ev->bdaddr)) { @@ -2081,12 +2119,13 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb) } memcpy(conn->dev_class, ev->dev_class, 3); - conn->state = BT_CONNECT; hci_dev_unlock(hdev); - if (ev->link_type == ACL_LINK || !lmp_esco_capable(hdev)) { + if (ev->link_type == ACL_LINK || + (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) { struct hci_cp_accept_conn_req cp; + conn->state = BT_CONNECT; bacpy(&cp.bdaddr, &ev->bdaddr); @@ -2097,8 +2136,9 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb) hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); - } else { + } else if (!(flags & HCI_PROTO_DEFER)) { struct hci_cp_accept_sync_conn_req cp; + conn->state = BT_CONNECT; bacpy(&cp.bdaddr, &ev->bdaddr); cp.pkt_type = cpu_to_le16(conn->pkt_type); @@ -2111,6 +2151,10 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb) hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp), &cp); + } else { + conn->state = BT_CONNECT2; + hci_proto_connect_cfm(conn, 0); + hci_conn_put(conn); } } else { /* Connection rejected */ diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c6678f2bffc9..eea17cdcaf7f 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -397,6 +397,7 @@ static void sco_sock_init(struct sock *sk, struct sock *parent) if (parent) { sk->sk_type = parent->sk_type; + bt_sk(sk)->flags = bt_sk(parent)->flags; security_sk_clone(parent, sk); } } @@ -662,6 +663,28 @@ static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, return err; } +static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t len, int flags) +{ + struct sock *sk = sock->sk; + struct sco_pinfo *pi = sco_pi(sk); + + lock_sock(sk); + + if (sk->sk_state == BT_CONNECT2 && + test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { + hci_conn_accept(pi->conn->hcon, 0); + sk->sk_state = BT_CONFIG; + + release_sock(sk); + return 0; + } + + release_sock(sk); + + return bt_sock_recvmsg(iocb, sock, msg, len, flags); +} + static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; @@ -906,7 +929,10 @@ static void sco_conn_ready(struct sco_conn *conn) hci_conn_hold(conn->hcon); __sco_chan_add(conn, sk, parent); - sk->sk_state = BT_CONNECTED; + if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) + sk->sk_state = BT_CONNECT2; + else + sk->sk_state = BT_CONNECTED; /* Wake up parent */ parent->sk_data_ready(parent, 1); @@ -919,7 +945,7 @@ done: } /* ----- SCO interface with lower layer (HCI) ----- */ -int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) +int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) { struct sock *sk; struct hlist_node *node; @@ -936,6 +962,9 @@ int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { lm |= HCI_LM_ACCEPT; + + if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) + *flags |= HCI_PROTO_DEFER; break; } } @@ -1024,7 +1053,7 @@ static const struct proto_ops sco_sock_ops = { .accept = sco_sock_accept, .getname = sco_sock_getname, .sendmsg = sco_sock_sendmsg, - .recvmsg = bt_sock_recvmsg, + .recvmsg = sco_sock_recvmsg, .poll = bt_sock_poll, .ioctl = bt_sock_ioctl, .mmap = sock_no_mmap, From ffa88e02bc67a1496fae762ad899e8f49136e7a1 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Fri, 23 Nov 2012 16:50:51 -0200 Subject: [PATCH 05/12] Bluetooth: Move double negation to macros Some comparisons needs to double negation(!!) in order to make the value of the field boolean. Add it to the macro makes the code more readable. Signed-off-by: Gustavo Padovan --- include/net/bluetooth/hci_core.h | 6 +++--- net/bluetooth/hci_event.c | 4 ++-- net/bluetooth/mgmt.c | 10 +++++----- 3 files changed, 10 insertions(+), 10 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 76891a914e75..2f2b743f5b10 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -767,7 +767,7 @@ void hci_conn_del_sysfs(struct hci_conn *conn); #define lmp_sniffsubr_capable(dev) ((dev)->features[5] & LMP_SNIFF_SUBR) #define lmp_pause_enc_capable(dev) ((dev)->features[5] & LMP_PAUSE_ENC) #define lmp_ext_inq_capable(dev) ((dev)->features[6] & LMP_EXT_INQ) -#define lmp_le_br_capable(dev) ((dev)->features[6] & LMP_SIMUL_LE_BR) +#define lmp_le_br_capable(dev) !!((dev)->features[6] & LMP_SIMUL_LE_BR) #define lmp_ssp_capable(dev) ((dev)->features[6] & LMP_SIMPLE_PAIR) #define lmp_no_flush_capable(dev) ((dev)->features[6] & LMP_NO_FLUSH) #define lmp_lsto_capable(dev) ((dev)->features[7] & LMP_LSTO) @@ -776,8 +776,8 @@ void hci_conn_del_sysfs(struct hci_conn *conn); /* ----- Extended LMP capabilities ----- */ #define lmp_host_ssp_capable(dev) ((dev)->host_features[0] & LMP_HOST_SSP) -#define lmp_host_le_capable(dev) ((dev)->host_features[0] & LMP_HOST_LE) -#define lmp_host_le_br_capable(dev) ((dev)->host_features[0] & LMP_HOST_LE_BREDR) +#define lmp_host_le_capable(dev) !!((dev)->host_features[0] & LMP_HOST_LE) +#define lmp_host_le_br_capable(dev) !!((dev)->host_features[0] & LMP_HOST_LE_BREDR) /* ----- HCI protocols ----- */ #define HCI_PROTO_DEFER 0x01 diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 3843f1897c86..705078a0cc39 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -794,10 +794,10 @@ static void hci_set_le_support(struct hci_dev *hdev) if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) { cp.le = 1; - cp.simul = !!lmp_le_br_capable(hdev); + cp.simul = lmp_le_br_capable(hdev); } - if (cp.le != !!lmp_host_le_capable(hdev)) + if (cp.le != lmp_host_le_capable(hdev)) hci_send_cmd(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp), &cp); } diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index dedbb1d8b2d2..5d0ef759ef49 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1225,7 +1225,7 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) } val = !!cp->val; - enabled = !!lmp_host_le_capable(hdev); + enabled = lmp_host_le_capable(hdev); if (!hdev_is_powered(hdev) || val == enabled) { bool changed = false; @@ -1261,7 +1261,7 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) if (val) { hci_cp.le = val; - hci_cp.simul = !!lmp_le_br_capable(hdev); + hci_cp.simul = lmp_le_br_capable(hdev); } err = hci_send_cmd(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(hci_cp), @@ -2924,13 +2924,13 @@ int mgmt_powered(struct hci_dev *hdev, u8 powered) struct hci_cp_write_le_host_supported cp; cp.le = 1; - cp.simul = !!lmp_le_br_capable(hdev); + cp.simul = lmp_le_br_capable(hdev); /* Check first if we already have the right * host state (host features set) */ - if (cp.le != !!lmp_host_le_capable(hdev) || - cp.simul != !!lmp_host_le_br_capable(hdev)) + if (cp.le != lmp_host_le_capable(hdev) || + cp.simul != lmp_host_le_br_capable(hdev)) hci_send_cmd(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp), &cp); From 5e4e3972b8da23e270fa37670caec4d32f2197f7 Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Wed, 28 Nov 2012 17:59:39 +0200 Subject: [PATCH 06/12] Bluetooth: Refactor l2cap_send_disconn_req l2cap_send_disconn_req takes 3 parameters of which conn might be derived from chan. Make this conversion inside l2cap_send_disconn_req. Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- net/bluetooth/l2cap_core.c | 56 ++++++++++++++++++-------------------- 1 file changed, 26 insertions(+), 30 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index b52f66d22437..f7ee037c7934 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -53,8 +53,7 @@ static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data); static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); -static void l2cap_send_disconn_req(struct l2cap_conn *conn, - struct l2cap_chan *chan, int err); +static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err); static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control, struct sk_buff_head *skbs, u8 event); @@ -632,7 +631,7 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason) if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && conn->hcon->type == ACL_LINK) { __set_chan_timer(chan, sk->sk_sndtimeo); - l2cap_send_disconn_req(conn, chan, reason); + l2cap_send_disconn_req(chan, reason); } else l2cap_chan_del(chan, reason); break; @@ -1180,10 +1179,10 @@ static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) } } -static void l2cap_send_disconn_req(struct l2cap_conn *conn, - struct l2cap_chan *chan, int err) +static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err) { struct sock *sk = chan->sk; + struct l2cap_conn *conn = chan->conn; struct l2cap_disconn_req req; if (!conn) @@ -1960,7 +1959,7 @@ static void l2cap_ertm_resend(struct l2cap_chan *chan) if (chan->max_tx != 0 && bt_cb(skb)->control.retries > chan->max_tx) { BT_DBG("Retry limit exceeded (%d)", chan->max_tx); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); l2cap_seq_list_clear(&chan->retrans_list); break; } @@ -2666,7 +2665,7 @@ static void l2cap_tx_state_wait_f(struct l2cap_chan *chan, __set_monitor_timer(chan); chan->retry_count++; } else { - l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); + l2cap_send_disconn_req(chan, ECONNABORTED); } break; default: @@ -3877,7 +3876,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, /* Complete config. */ len = l2cap_parse_conf_req(chan, rsp); if (len < 0) { - l2cap_send_disconn_req(conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto unlock; } @@ -3899,7 +3898,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, err = l2cap_ertm_init(chan); if (err < 0) - l2cap_send_disconn_req(chan->conn, chan, -err); + l2cap_send_disconn_req(chan, -err); else l2cap_chan_ready(chan); @@ -3967,7 +3966,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, len = l2cap_parse_conf_rsp(chan, rsp->data, len, buf, &result); if (len < 0) { - l2cap_send_disconn_req(conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto done; } @@ -3988,7 +3987,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, char req[64]; if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { - l2cap_send_disconn_req(conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto done; } @@ -3997,7 +3996,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, len = l2cap_parse_conf_rsp(chan, rsp->data, len, req, &result); if (len < 0) { - l2cap_send_disconn_req(conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto done; } @@ -4013,7 +4012,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, l2cap_chan_set_err(chan, ECONNRESET); __set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT); - l2cap_send_disconn_req(conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto done; } @@ -4030,7 +4029,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, err = l2cap_ertm_init(chan); if (err < 0) - l2cap_send_disconn_req(chan->conn, chan, -err); + l2cap_send_disconn_req(chan, -err); else l2cap_chan_ready(chan); } @@ -4392,7 +4391,7 @@ static void l2cap_logical_fail(struct l2cap_chan *chan) /* Logical link setup failed */ if (chan->state != BT_CONNECTED) { /* Create channel failure, disconnect */ - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); return; } @@ -4435,7 +4434,7 @@ static void l2cap_logical_finish_create(struct l2cap_chan *chan, err = l2cap_ertm_init(chan); if (err < 0) - l2cap_send_disconn_req(chan->conn, chan, -err); + l2cap_send_disconn_req(chan, -err); else l2cap_chan_ready(chan); } @@ -5400,7 +5399,7 @@ static void l2cap_handle_srej(struct l2cap_chan *chan, if (control->reqseq == chan->next_tx_seq) { BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); return; } @@ -5414,7 +5413,7 @@ static void l2cap_handle_srej(struct l2cap_chan *chan, if (chan->max_tx != 0 && bt_cb(skb)->control.retries >= chan->max_tx) { BT_DBG("Retry limit exceeded (%d)", chan->max_tx); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); return; } @@ -5458,7 +5457,7 @@ static void l2cap_handle_rej(struct l2cap_chan *chan, if (control->reqseq == chan->next_tx_seq) { BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); return; } @@ -5467,7 +5466,7 @@ static void l2cap_handle_rej(struct l2cap_chan *chan, if (chan->max_tx && skb && bt_cb(skb)->control.retries >= chan->max_tx) { BT_DBG("Retry limit exceeded (%d)", chan->max_tx); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); return; } @@ -5651,8 +5650,7 @@ static int l2cap_rx_state_recv(struct l2cap_chan *chan, break; case L2CAP_TXSEQ_INVALID: default: - l2cap_send_disconn_req(chan->conn, chan, - ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); break; } break; @@ -5785,8 +5783,7 @@ static int l2cap_rx_state_srej_sent(struct l2cap_chan *chan, break; case L2CAP_TXSEQ_INVALID: default: - l2cap_send_disconn_req(chan->conn, chan, - ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); break; } break; @@ -5981,7 +5978,7 @@ static int l2cap_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control, BT_DBG("Invalid reqseq %d (next_tx_seq %d, expected_ack_seq %d", control->reqseq, chan->next_tx_seq, chan->expected_ack_seq); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); } return err; @@ -6050,7 +6047,7 @@ static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) len -= L2CAP_FCS_SIZE; if (len > chan->mps) { - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto drop; } @@ -6075,8 +6072,7 @@ static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) } if (err) - l2cap_send_disconn_req(chan->conn, chan, - ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); } else { const u8 rx_func_to_event[4] = { L2CAP_EV_RECV_RR, L2CAP_EV_RECV_REJ, @@ -6093,7 +6089,7 @@ static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) if (len != 0) { BT_ERR("Trailing bytes: %d in sframe", len); - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); goto drop; } @@ -6104,7 +6100,7 @@ static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) event = rx_func_to_event[control->super]; if (l2cap_rx(chan, control, skb, event)) - l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); + l2cap_send_disconn_req(chan, ECONNRESET); } return 0; From ced5c338d7b696021058c23fb6a286def2171df5 Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Wed, 28 Nov 2012 17:59:42 +0200 Subject: [PATCH 07/12] Bluetooth: AMP: Mark controller radio powered down after HCIDEVDOWN After getting HCIDEVDOWN controller did not mark itself as 0x00 which means: "The Controller radio is available but is currently physically powered down". The result was even if the hdev was down we return in controller list value 0x01 "status 0x01 (Bluetooth only)". Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- net/bluetooth/hci_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 69eb644f0d48..ec7d3a7adf74 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -861,6 +861,9 @@ static int hci_dev_do_close(struct hci_dev *hdev) /* Clear flags */ hdev->flags = 0; + /* Controller radio is available but is currently powered down */ + hdev->amp_status = 0; + memset(hdev->eir, 0, sizeof(hdev->eir)); memset(hdev->dev_class, 0, sizeof(hdev->dev_class)); From 5d05416e0907b0dd30b62b002bed3b85e6efbd61 Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Thu, 29 Nov 2012 17:46:05 +0200 Subject: [PATCH 08/12] Bluetooth: AMP: Check that AMP is present and active Before starting quering remote AMP controllers make sure that there is local active AMP controller. Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- include/net/bluetooth/hci_core.h | 16 ++++++++++++++++ net/bluetooth/l2cap_core.c | 1 + 2 files changed, 17 insertions(+) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 2f2b743f5b10..014a2eaa5389 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -779,6 +779,22 @@ void hci_conn_del_sysfs(struct hci_conn *conn); #define lmp_host_le_capable(dev) !!((dev)->host_features[0] & LMP_HOST_LE) #define lmp_host_le_br_capable(dev) !!((dev)->host_features[0] & LMP_HOST_LE_BREDR) +/* returns true if at least one AMP active */ +static inline bool hci_amp_capable(void) +{ + struct hci_dev *hdev; + bool ret = false; + + read_lock(&hci_dev_list_lock); + list_for_each_entry(hdev, &hci_dev_list, list) + if (hdev->amp_type == HCI_AMP && + test_bit(HCI_UP, &hdev->flags)) + ret = true; + read_unlock(&hci_dev_list_lock); + + return ret; +} + /* ----- HCI protocols ----- */ #define HCI_PROTO_DEFER 0x01 diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index f7ee037c7934..d8cffdbf0d37 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -1013,6 +1013,7 @@ static bool __amp_capable(struct l2cap_chan *chan) struct l2cap_conn *conn = chan->conn; if (enable_hs && + hci_amp_capable() && chan->chan_policy == BT_CHANNEL_POLICY_AMP_PREFERRED && conn->fixed_chan_mask & L2CAP_FC_A2MP) return true; From 60918918a9f3455859a4be0d4e381003cbdb843f Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Thu, 29 Nov 2012 17:46:06 +0200 Subject: [PATCH 09/12] Bluetooth: Fix missing L2CAP EWS Conf parameter If L2CAP_FEAT_FCS is not supported we sould miss EWS option configuration because of break. Make code more readable by combining FCS configuration in the single block. Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- net/bluetooth/l2cap_core.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index d8cffdbf0d37..d22d183ddd45 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -3106,18 +3106,17 @@ done: if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) l2cap_add_opt_efs(&ptr, chan); - if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) - break; - - if (chan->fcs == L2CAP_FCS_NONE || - test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { - chan->fcs = L2CAP_FCS_NONE; - l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); - } - if (test_bit(FLAG_EXT_CTRL, &chan->flags)) l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, chan->tx_win); + + if (chan->conn->feat_mask & L2CAP_FEAT_FCS) + if (chan->fcs == L2CAP_FCS_NONE || + test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { + chan->fcs = L2CAP_FCS_NONE; + l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, + chan->fcs); + } break; case L2CAP_MODE_STREAMING: @@ -3139,14 +3138,13 @@ done: if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) l2cap_add_opt_efs(&ptr, chan); - if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) - break; - - if (chan->fcs == L2CAP_FCS_NONE || - test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { - chan->fcs = L2CAP_FCS_NONE; - l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); - } + if (chan->conn->feat_mask & L2CAP_FEAT_FCS) + if (chan->fcs == L2CAP_FCS_NONE || + test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { + chan->fcs = L2CAP_FCS_NONE; + l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, + chan->fcs); + } break; } From cbabee788ff881b87bbaf258caf080b49a61fa43 Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Thu, 29 Nov 2012 17:46:07 +0200 Subject: [PATCH 10/12] Bluetooth: Process receiving FCS_NONE in L2CAP Conf Rsp Process L2CAP Config rsp Pending with FCS Option 0x00 (No FCS) which is sent by Motorola Windows 7 Bluetooth stack. The trace is shown below (all other options are skipped). ... < ACL data: handle 1 flags 0x00 dlen 48 L2CAP(s): Config req: dcid 0x0043 flags 0x00 clen 36 ... FCS Option 0x00 (No FCS) > ACL data: handle 1 flags 0x02 dlen 48 L2CAP(s): Config req: dcid 0x0041 flags 0x00 clen 36 ... FCS Option 0x01 (CRC16 Check) < ACL data: handle 1 flags 0x00 dlen 47 L2CAP(s): Config rsp: scid 0x0043 flags 0x00 result 4 clen 33 Pending ... > ACL data: handle 1 flags 0x02 dlen 50 L2CAP(s): Config rsp: scid 0x0041 flags 0x00 result 4 clen 36 Pending ... FCS Option 0x00 (No FCS) < ACL data: handle 1 flags 0x00 dlen 14 L2CAP(s): Config rsp: scid 0x0043 flags 0x00 result 0 clen 0 Success > ACL data: handle 1 flags 0x02 dlen 14 L2CAP(s): Config rsp: scid 0x0041 flags 0x00 result 0 clen 0 Success ... Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- net/bluetooth/l2cap_core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index d22d183ddd45..8c432771d6f9 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -3431,6 +3431,13 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len, l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs), (unsigned long) &efs); break; + + case L2CAP_CONF_FCS: + if (*result == L2CAP_CONF_PENDING) + if (val == L2CAP_FCS_NONE) + set_bit(CONF_NO_FCS_RECV, + &chan->conf_state); + break; } } From f2592d3ee3c5817981f343b90bfb9c5612f38d23 Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Thu, 29 Nov 2012 17:46:08 +0200 Subject: [PATCH 11/12] Bluetooth: trivial: Change NO_FCS_RECV to RECV_NO_FCS Make code more readable by changing CONF_NO_FCS_RECV which is read as "No L2CAP FCS option received" to CONF_RECV_NO_FCS which means "Received L2CAP option NO_FCS". This flag really means that we have received L2CAP FRAME CHECK SEQUENCE (FCS) OPTION with value "No FCS". Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- include/net/bluetooth/l2cap.h | 2 +- net/bluetooth/l2cap_core.c | 10 +++++----- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index f57fab04e7c5..7588ef44ebaf 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -611,7 +611,7 @@ enum { CONF_MTU_DONE, CONF_MODE_DONE, CONF_CONNECT_PEND, - CONF_NO_FCS_RECV, + CONF_RECV_NO_FCS, CONF_STATE2_DEVICE, CONF_EWS_RECV, CONF_LOC_CONF_PEND, diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 8c432771d6f9..2c78208d793e 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -3112,7 +3112,7 @@ done: if (chan->conn->feat_mask & L2CAP_FEAT_FCS) if (chan->fcs == L2CAP_FCS_NONE || - test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { + test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) { chan->fcs = L2CAP_FCS_NONE; l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); @@ -3140,7 +3140,7 @@ done: if (chan->conn->feat_mask & L2CAP_FEAT_FCS) if (chan->fcs == L2CAP_FCS_NONE || - test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { + test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) { chan->fcs = L2CAP_FCS_NONE; l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); @@ -3196,7 +3196,7 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) case L2CAP_CONF_FCS: if (val == L2CAP_FCS_NONE) - set_bit(CONF_NO_FCS_RECV, &chan->conf_state); + set_bit(CONF_RECV_NO_FCS, &chan->conf_state); break; case L2CAP_CONF_EFS: @@ -3435,7 +3435,7 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len, case L2CAP_CONF_FCS: if (*result == L2CAP_CONF_PENDING) if (val == L2CAP_FCS_NONE) - set_bit(CONF_NO_FCS_RECV, + set_bit(CONF_RECV_NO_FCS, &chan->conf_state); break; } @@ -3807,7 +3807,7 @@ static inline void set_default_fcs(struct l2cap_chan *chan) */ if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) chan->fcs = L2CAP_FCS_NONE; - else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) + else if (!test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) chan->fcs = L2CAP_FCS_CRC16; } From 0b27a4b97cb1874503c78453c0903df53c0c86b2 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Mon, 3 Dec 2012 15:36:51 -0200 Subject: [PATCH 12/12] Revert "Bluetooth: Fix possible deadlock in SCO code" This reverts commit 269c4845d5b3627b95b1934107251bacbe99bb68. The commit was causing dead locks and NULL dereferences in the sco code: [28084.104013] BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u:0H:7] [28084.104021] Modules linked in: btusb bluetooth ] _raw_spin_lock+0xd/0x10 [28084.104021] [] sco_conn_del+0x58/0x1b0 [bluetooth] [28084.104021] [] sco_connect_cfm+0xb9/0x2b0 [bluetooth] [28084.104021] [] hci_sync_conn_complete_evt.isra.94+0x1c9/0x260 [bluetooth] [28084.104021] [] hci_event_packet+0x74d/0x2b40 [bluetooth] [28084.104021] [] ? __kfree_skb+0x3d/0x90 [28084.104021] [] ? kfree_skb+0x36/0x90 [28084.104021] [] ? hci_send_to_monitor+0x10e/0x190 [bluetooth] [28084.104021] [] ? hci_send_to_monitor+0x10e/0x190 [bluetooth] Cc: stable@vger.kernel.org Reported-by: Chan-yeol Park Signed-off-by: Gustavo Padovan --- net/bluetooth/sco.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index eea17cdcaf7f..531a93d613d4 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -131,15 +131,6 @@ static int sco_conn_del(struct hci_conn *hcon, int err) sco_sock_clear_timer(sk); sco_chan_del(sk, err); bh_unlock_sock(sk); - - sco_conn_lock(conn); - conn->sk = NULL; - sco_pi(sk)->conn = NULL; - sco_conn_unlock(conn); - - if (conn->hcon) - hci_conn_put(conn->hcon); - sco_sock_kill(sk); } @@ -885,6 +876,16 @@ static void sco_chan_del(struct sock *sk, int err) BT_DBG("sk %p, conn %p, err %d", sk, conn, err); + if (conn) { + sco_conn_lock(conn); + conn->sk = NULL; + sco_pi(sk)->conn = NULL; + sco_conn_unlock(conn); + + if (conn->hcon) + hci_conn_put(conn->hcon); + } + sk->sk_state = BT_CLOSED; sk->sk_err = err; sk->sk_state_change(sk);