This is a note to let you know that I've just added the patch titled

net/unix: don't show information about sockets from other namespaces

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: net-unix-don-t-show-information-about-sockets-from-other-namespaces.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Nov 16 15:48:06 CET 2017

From: Andrei Vagin avagin@openvz.org Date: Wed, 25 Oct 2017 10:16:42 -0700 Subject: net/unix: don't show information about sockets from other namespaces

From: Andrei Vagin avagin@openvz.org

[ Upstream commit 0f5da659d8f1810f44de14acf2c80cd6499623a0 ]

socket_diag shows information only about sockets from a namespace where a diag socket lives.

But if we request information about one unix socket, the kernel don't check that its netns is matched with a diag socket namespace, so any user can get information about any unix socket in a system. This looks like a bug.

v2: add a Fixes tag

Fixes: 51d7cccf0723 ("net: make sock diag per-namespace") Signed-off-by: Andrei Vagin avagin@openvz.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/unix/diag.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/net/unix/diag.c +++ b/net/unix/diag.c @@ -256,6 +256,8 @@ static int unix_diag_get_exact(struct sk err = -ENOENT; if (sk == NULL) goto out_nosk; + if (!net_eq(sock_net(sk), net)) + goto out;

err = sock_diag_check_cookie(sk, req->udiag_cookie); if (err)

Patches currently in stable-queue which might be from avagin@openvz.org are

queue-3.18/net-unix-don-t-show-information-about-sockets-from-other-namespaces.patch