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linux-stable/net/vmw_vsock
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Marco Pinna 9ceabf9f2f vsock/virtio: fix packet delivery to tap device 
commit b32a09ea7c upstream.

Commit 82dfb540ae ("VSOCK: Add virtio vsock vsockmon hooks") added
virtio_transport_deliver_tap_pkt() for handing packets to the
vsockmon device. However, in virtio_transport_send_pkt_work(),
the function is called before actually sending the packet (i.e.
before placing it in the virtqueue with virtqueue_add_sgs() and checking
whether it returned successfully).
Queuing the packet in the virtqueue can fail even multiple times.
However, in virtio_transport_deliver_tap_pkt() we deliver the packet
to the monitoring tap interface only the first time we call it.
This certainly avoids seeing the same packet replicated multiple times
in the monitoring interface, but it can show the packet sent with the
wrong timestamp or even before we succeed to queue it in the virtqueue.

Move virtio_transport_deliver_tap_pkt() after calling virtqueue_add_sgs()
and making sure it returned successfully.

Fixes: 82dfb540ae ("VSOCK: Add virtio vsock vsockmon hooks")
Cc: stable@vge.kernel.org
Signed-off-by: Marco Pinna <marco.pinn95@gmail.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20240329161259.411751-1-marco.pinn95@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-04-10 16:38:03 +02:00
..
Kconfig
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Makefile vsock: support sockmap 2023-03-29 08:19:38 +01:00
af_vsock.c virtio/vsock: send credit update during setting SO_RCVLOWAT 2023-12-15 10:37:35 +00:00
af_vsock_tap.c
…
diag.c net: fill in MODULE_DESCRIPTION()s for SOCK_DIAG modules 2023-11-19 20:09:13 +00:00
hyperv_transport.c virtio/vsock: send credit update during setting SO_RCVLOWAT 2023-12-15 10:37:35 +00:00
virtio_transport.c vsock/virtio: fix packet delivery to tap device 2024-04-10 16:38:03 +02:00
virtio_transport_common.c virtio/vsock: send credit update during setting SO_RCVLOWAT 2023-12-15 10:37:35 +00:00
vmci_transport.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-06 12:01:20 -07:00
vmci_transport.h vsock: Remove unused function declarations 2023-07-31 14:41:08 -07:00
vmci_transport_notify.c vmci/vsock: check SO_RCVLOWAT before wake up reader 2022-08-23 10:43:12 +02:00
vmci_transport_notify.h
…
vmci_transport_notify_qstate.c vmci/vsock: check SO_RCVLOWAT before wake up reader 2022-08-23 10:43:12 +02:00
vsock_addr.c
…
vsock_bpf.c vsock: support sockmap 2023-03-29 08:19:38 +01:00
vsock_loopback.c virtio/vsock: send credit update during setting SO_RCVLOWAT 2023-12-15 10:37:35 +00:00