linux/drivers/vhost
Jiyong Park d9fe590970 vsock: each transport cycles only on its own sockets
[ Upstream commit 8e6ed96376 ]

When iterating over sockets using vsock_for_each_connected_socket, make
sure that a transport filters out sockets that don't belong to the
transport.

There actually was an issue caused by this; in a nested VM
configuration, destroying the nested VM (which often involves the
closing of /dev/vhost-vsock if there was h2g connections to the nested
VM) kills not only the h2g connections, but also all existing g2h
connections to the (outmost) host which are totally unrelated.

Tested: Executed the following steps on Cuttlefish (Android running on a
VM) [1]: (1) Enter into an `adb shell` session - to have a g2h
connection inside the VM, (2) open and then close /dev/vhost-vsock by
`exec 3< /dev/vhost-vsock && exec 3<&-`, (3) observe that the adb
session is not reset.

[1] https://android.googlesource.com/device/google/cuttlefish/

Fixes: c0cfa2d8a7 ("vsock: add multi-transports support")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jiyong Park <jiyong@google.com>
Link: https://lore.kernel.org/r/20220311020017.1509316-1-jiyong@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-03-23 09:13:27 +01:00
..
iotlb.c vhost: Fix documentation 2020-09-24 05:54:36 -04:00
Kconfig vhost_vdpa: implement IRQ offloading in vhost_vdpa 2020-08-05 11:08:42 -04:00
Makefile
net.c vhost_net: fix OoB on sendmsg() failure. 2021-09-22 12:27:58 +02:00
scsi.c vhost scsi: fix error return code in vhost_scsi_set_endpoint() 2020-12-30 11:54:00 +01:00
test.c
test.h
vdpa.c vdpa: check that offsets are within bounds 2021-12-22 09:30:51 +01:00
vhost.c vhost: Fix the calculation in vhost_overflow() 2021-08-26 08:35:42 -04:00
vhost.h vhost: add helper to check if a vq has been setup 2020-11-15 17:30:54 -05:00
vringh.c vringh: Use wiov->used to check for read/write desc order 2021-09-03 10:09:27 +02:00
vsock.c vsock: each transport cycles only on its own sockets 2022-03-23 09:13:27 +01:00