linux-kernel - [PATCH 3.16 131/133] VSOCK: Detach QP check should filter out non matching QPs.

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Date:   Wed, 22 Nov 2017 01:58:13 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "George Zhang" <georgezhang@...are.com>,
        "Jorgen Hansen" <jhansen@...are.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Michal Hocko" <mhocko@...e.com>
Subject: [PATCH 3.16 131/133] VSOCK: Detach QP check should filter out non
 matching QPs.

3.16.51-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Jorgen Hansen <jhansen@...are.com>

commit 8ab18d71de8b07d2c4d6f984b718418c09ea45c5 upstream.

The check in vmci_transport_peer_detach_cb should only allow a
detach when the qp handle of the transport matches the one in
the detach message.

Testing: Before this change, a detach from a peer on a different
socket would cause an active stream socket to register a detach.

Reviewed-by: George Zhang <georgezhang@...are.com>
Signed-off-by: Jorgen Hansen <jhansen@...are.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Michal Hocko <mhocko@...e.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/vmw_vsock/vmci_transport.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -844,7 +844,7 @@ static void vmci_transport_peer_detach_c
 	 * qp_handle.
 	 */
 	if (vmci_handle_is_invalid(e_payload->handle) ||
-	    vmci_handle_is_equal(trans->qp_handle, e_payload->handle))
+	    !vmci_handle_is_equal(trans->qp_handle, e_payload->handle))
 		return;
 
 	/* We don't ask for delayed CBs when we subscribe to this event (we
@@ -2158,7 +2158,7 @@ module_exit(vmci_transport_exit);
 
 MODULE_AUTHOR("VMware, Inc.");
 MODULE_DESCRIPTION("VMCI transport for Virtual Sockets");
-MODULE_VERSION("1.0.2.0-k");
+MODULE_VERSION("1.0.3.0-k");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("vmware_vsock");
 MODULE_ALIAS_NETPROTO(PF_VSOCK);