diff options
| author | Sasha Levin <levinsasha928@gmail.com> | 2012-05-02 03:58:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-02 21:04:33 -0400 |
| commit | 84768edbb2721637620b2d84501bb0d5aed603f1 (patch) | |
| tree | 6b62fcfca8398296c12e8ebbd37985295ce698e0 /net/l2tp | |
| parent | 4fdcfa12843bca38d0c9deff70c8720e4e8f515f (diff) | |
| download | lwn-84768edbb2721637620b2d84501bb0d5aed603f1.tar.gz lwn-84768edbb2721637620b2d84501bb0d5aed603f1.zip | |
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>
Diffstat (limited to 'net/l2tp')
| -rw-r--r-- | net/l2tp/l2tp_ip.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c index 585d93ecee2d..6274f0be82b0 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; |