Messages in this thread Patch in this message | | | From | "Gustavo F. Padovan" <> | Subject | [PATCH 1/3] bluetooth: add write_lock_bh to __l2cap_chan_link | Date | Sat, 28 Feb 2009 02:02:25 -0300 |
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fix race condition
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br> --- net/bluetooth/l2cap.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index ca4d3b4..355f375 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -175,12 +175,14 @@ static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) { sock_hold(sk); + write_lock_bh(&l->lock); if (l->head) l2cap_pi(l->head)->prev_c = sk; l2cap_pi(sk)->next_c = l->head; l2cap_pi(sk)->prev_c = NULL; l->head = sk; + write_unlock_bh(&l->lock); } static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) -- 1.6.0.6
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