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 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
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-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Nov 16 15:08:14 CET 2017
From: Andrei Vagin <avagin@xxxxxxxxxx>
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@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/unix/diag.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -257,6 +257,8 @@ 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@xxxxxxxxxx are
queue-4.4/net-unix-don-t-show-information-about-sockets-from-other-namespaces.patch