This is a note to let you know that I've just added the patch titled selinux: vsock: Set SID for socket returned by accept() to the 4.9-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: selinux-vsock-set-sid-for-socket-returned-by-accept.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 03ddc16badfd0b1b547c546948a4bb61cb69e70f Author: David Brazdil <dbrazdil@xxxxxxxxxx> Date: Mon Mar 29 18:24:43 2021 +0000 selinux: vsock: Set SID for socket returned by accept() [ Upstream commit 1f935e8e72ec28dddb2dc0650b3b6626a293d94b ] For AF_VSOCK, accept() currently returns sockets that are unlabelled. Other socket families derive the child's SID from the SID of the parent and the SID of the incoming packet. This is typically done as the connected socket is placed in the queue that accept() removes from. Reuse the existing 'security_sk_clone' hook to copy the SID from the parent (server) socket to the child. There is no packet SID in this case. Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Signed-off-by: David Brazdil <dbrazdil@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index bd3a5ef8e59b..2fecdfe49bae 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -650,6 +650,7 @@ struct sock *__vsock_create(struct net *net, vsk->trusted = psk->trusted; vsk->owner = get_cred(psk->owner); vsk->connect_timeout = psk->connect_timeout; + security_sk_clone(parent, sk); } else { vsk->trusted = ns_capable_noaudit(&init_user_ns, CAP_NET_ADMIN); vsk->owner = get_current_cred();