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authorGustavo F. Padovan <gustavo@las.ic.unicamp.br>2009-08-23 23:45:19 -0400
committerMarcel Holtmann <marcel@holtmann.org>2009-08-24 04:05:05 -0400
commite686219a64fee9be9ce438dc3f040cd71ddd168a (patch)
tree1b72117be85dc4dd5c4656e459043d2528069760 /net
parent9e726b17422bade75fba94e625cd35fd1353e682 (diff)
Bluetooth: Add locking scheme to L2CAP timeout callbacks
Avoid race conditions when accessing the L2CAP socket from within the timeout handlers. Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/l2cap.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index c04526f3df2e..efac637525f1 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1192,6 +1192,7 @@ static void l2cap_monitor_timeout(unsigned long arg)
1192 struct sock *sk = (void *) arg; 1192 struct sock *sk = (void *) arg;
1193 u16 control; 1193 u16 control;
1194 1194
1195 bh_lock_sock(sk);
1195 if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { 1196 if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) {
1196 l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); 1197 l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk);
1197 return; 1198 return;
@@ -1203,6 +1204,7 @@ static void l2cap_monitor_timeout(unsigned long arg)
1203 control = L2CAP_CTRL_POLL; 1204 control = L2CAP_CTRL_POLL;
1204 control |= L2CAP_SUPER_RCV_READY; 1205 control |= L2CAP_SUPER_RCV_READY;
1205 l2cap_send_sframe(l2cap_pi(sk), control); 1206 l2cap_send_sframe(l2cap_pi(sk), control);
1207 bh_unlock_sock(sk);
1206} 1208}
1207 1209
1208static void l2cap_retrans_timeout(unsigned long arg) 1210static void l2cap_retrans_timeout(unsigned long arg)
@@ -1210,6 +1212,7 @@ static void l2cap_retrans_timeout(unsigned long arg)
1210 struct sock *sk = (void *) arg; 1212 struct sock *sk = (void *) arg;
1211 u16 control; 1213 u16 control;
1212 1214
1215 bh_lock_sock(sk);
1213 l2cap_pi(sk)->retry_count = 1; 1216 l2cap_pi(sk)->retry_count = 1;
1214 __mod_monitor_timer(); 1217 __mod_monitor_timer();
1215 1218
@@ -1218,6 +1221,7 @@ static void l2cap_retrans_timeout(unsigned long arg)
1218 control = L2CAP_CTRL_POLL; 1221 control = L2CAP_CTRL_POLL;
1219 control |= L2CAP_SUPER_RCV_READY; 1222 control |= L2CAP_SUPER_RCV_READY;
1220 l2cap_send_sframe(l2cap_pi(sk), control); 1223 l2cap_send_sframe(l2cap_pi(sk), control);
1224 bh_unlock_sock(sk);
1221} 1225}
1222 1226
1223static void l2cap_drop_acked_frames(struct sock *sk) 1227static void l2cap_drop_acked_frames(struct sock *sk)