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authorSasha Levin <levinsasha928@gmail.com>2012-05-02 03:58:43 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-02 21:04:33 -0400
commit84768edbb2721637620b2d84501bb0d5aed603f1 (patch)
tree6b62fcfca8398296c12e8ebbd37985295ce698e0
parent4fdcfa12843bca38d0c9deff70c8720e4e8f515f (diff)
net: l2tp: unlock socket lock before returning from l2tp_ip_sendmsg
l2tp_ip_sendmsg could return without releasing socket lock, making it all the way to userspace, and generating the following warning: [ 130.891594] ================================================ [ 130.894569] [ BUG: lock held when returning to user space! ] [ 130.897257] 3.4.0-rc5-next-20120501-sasha #104 Tainted: G W [ 130.900336] ------------------------------------------------ [ 130.902996] trinity/8384 is leaving the kernel with locks still held! [ 130.906106] 1 lock held by trinity/8384: [ 130.907924] #0: (sk_lock-AF_INET){+.+.+.}, at: [<ffffffff82b9503f>] l2tp_ip_sendmsg+0x2f/0x550 Introduced by commit 2f16270 ("l2tp: Fix locking in l2tp_ip.c"). Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/l2tp/l2tp_ip.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 585d93ecee2..6274f0be82b 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -442,8 +442,9 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
daddr = lip->l2tp_addr.s_addr;
} else {
+ rc = -EDESTADDRREQ;
if (sk->sk_state != TCP_ESTABLISHED)
- return -EDESTADDRREQ;
+ goto out;
daddr = inet->inet_daddr;
connected = 1;