linux-kernel - [PATCH 06/10] vsock: set socket peercred

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211021123714.1125384-7-marcandre.lureau@redhat.com>
Date:   Thu, 21 Oct 2021 16:37:10 +0400
From:   Marc-André Lureau <marcandre.lureau@...hat.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, sgarzare@...hat.com,
        davem@...emloft.net, kuba@...nel.org,
        Marc-André Lureau <marcandre.lureau@...hat.com>
Subject: [PATCH 06/10] vsock: set socket peercred

When AF_VSOCK socket is created, the peercreds are set to the current
process values.

This is how AF_UNIX listen work too, but unconnected AF_UNIX sockets
return pid:0 & uid/gid:-1.

Signed-off-by: Marc-André Lureau <marcandre.lureau@...hat.com>
---
 net/vmw_vsock/af_vsock.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 1925682a942a..9b211ff49b08 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -760,6 +760,7 @@ static struct sock *__vsock_create(struct net *net,
 
 	psk = parent ? vsock_sk(parent) : NULL;
 	if (parent) {
+		sock_copy_peercred(sk, parent);
 		vsk->trusted = psk->trusted;
 #if IS_ENABLED(CONFIG_VMWARE_VMCI_VSOCKETS)
 		vsk->owner = get_cred(psk->owner);
@@ -770,6 +771,7 @@ static struct sock *__vsock_create(struct net *net,
 		vsk->buffer_max_size = psk->buffer_max_size;
 		security_sk_clone(parent, sk);
 	} else {
+		sock_init_peercred(sk);
 		vsk->trusted = ns_capable_noaudit(&init_user_ns, CAP_NET_ADMIN);
 #if IS_ENABLED(CONFIG_VMWARE_VMCI_VSOCKETS)
 		vsk->owner = get_current_cred();
-- 
2.33.0.721.g106298f7f9