Messages in this thread Patch in this message | | | Date | Fri, 18 May 2012 14:16:13 -0700 | From | Greg KH <> | Subject | [ 14/54] net: l2tp: unlock socket lock before returning from l2tp_ip_sendmsg |
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3.0-stable review patch. If anyone has any objections, please let me know.
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From: Sasha Levin <levinsasha928@gmail.com>
[ 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> --- net/l2tp/l2tp_ip.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -441,8 +441,9 @@ static int l2tp_ip_sendmsg(struct kiocb 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;
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