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Message-Id: <1235797347-1816-1-git-send-email-gustavo@las.ic.unicamp.br>
Date: Sat, 28 Feb 2009 02:02:25 -0300
From: "Gustavo F. Padovan" <gustavo@....ic.unicamp.br>
To: linux-bluetooth@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] bluetooth: add write_lock_bh to __l2cap_chan_link
fix race condition
Signed-off-by: Gustavo F. Padovan <gustavo@....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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