diff options
| author | Sasha Levin <levinsasha928@gmail.com> | 2012-05-02 03:58:43 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-21 09:39:59 -0700 |
| commit | ff422223cc56542d31575afd05b02bd1493abf4b (patch) | |
| tree | 1f3a9031a0d08ed195f832625269d9bfd9fda5e3 /net | |
| parent | 4e133084e946f32d6fc489c43274d68a8428a7ed (diff) | |
net: l2tp: unlock socket lock before returning from l2tp_ip_sendmsg
[ Upstream commit 84768edbb2721637620b2d84501bb0d5aed603f1 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -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 858ca23aa6dc..ea52d028632d 100644 --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -441,8 +441,9 @@ 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; |