Seth Forshee e3b3939fd1 vsock: remove vsock from connected table when connect is interrupted by a signal ... commit b9208492fc upstream. vsock_connect() expects that the socket could already be in the TCP_ESTABLISHED state when the connecting task wakes up with a signal pending. If this happens the socket will be in the connected table, and it is not removed when the socket state is reset. In this situation it's common for the process to retry connect(), and if the connection is successful the socket will be added to the connected table a second time, corrupting the list. Prevent this by calling vsock_remove_connected() if a signal is received while waiting for a connection. This is harmless if the socket is not in the connected table, and if it is in the table then removing it will prevent list corruption from a double add. Note for backporting: this patch requires d5afa82c97 ("vsock: correct removal of socket from the list"), which is in all current stable trees except 4.9.y. Fixes: d021c34405 ("VSOCK: Introduce VM Sockets") Signed-off-by: Seth Forshee <sforshee@digitalocean.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20220217141312.2297547-1-sforshee@digitalocean.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-02-23 11:57:34 +01:00
..
af_vsock.c	vsock: remove vsock from connected table when connect is interrupted by a signal	2022-02-23 11:57:34 +01:00
af_vsock_tap.c	VSOCK: Add vsockmon tap functions	2017-04-24 12:35:56 -04:00
hyperv_transport.c	vsock: fix locking in vsock_shutdown()	2021-02-23 14:00:33 +01:00
Kconfig	hv_sock: implements Hyper-V transport for Virtual Sockets (AF_VSOCK)	2017-08-28 15:38:18 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
virtio_transport.c	vsock/virtio: avoid potential deadlock when vsock device remove	2021-08-26 08:37:02 -04:00
virtio_transport_common.c	vsock/virtio: update credit only if socket is not closed	2021-02-23 14:00:32 +01:00
vmci_transport.c	vsock/vmci: log once the failed queue pair allocation	2021-05-22 10:57:34 +02:00
vmci_transport.h	VSOCK: constify vmci_transport_notify_ops structures	2015-11-23 15:49:29 -05:00
vmci_transport_notify.c	VSOCK: use TCP state constants for sk_state	2019-08-04 09:31:59 +02:00
vmci_transport_notify.h	VSOCK: constify vmci_transport_notify_ops structures	2015-11-23 15:49:29 -05:00
vmci_transport_notify_qstate.c	VSOCK: use TCP state constants for sk_state	2019-08-04 09:31:59 +02:00
vsock_addr.c