Subject: [PATCH v4 0/9] vsock/virtio: SKB allocation improvements

From: Will Deacon <[email-masked]>
Date: Thu, 17 Jul 2025 10:01:07 +0100

Hi all,

Here is version four of the patches I previously posted here:

  v1: https://lore.kernel.org/r/[email-masked]
  v2: https://lore.kernel.org/r/[email-masked]
  v3: https://lore.kernel.org/r/[email-masked]

There are only two minor changes since v3:

  * Use unlikely() in payload length check on the virtio rx path

  * Add R-b tags from Stefano

Cheers,

Will

Cc: Keir Fraser <[email-masked]>
Cc: Steven Moreland <[email-masked]>
Cc: Frederick Mayle <[email-masked]>
Cc: Stefan Hajnoczi <[email-masked]>
Cc: Stefano Garzarella <[email-masked]>
Cc: "Michael S. Tsirkin" <[email-masked]>
Cc: Jason Wang <[email-masked]>
Cc: "Eugenio Pérez" <[email-masked]>
Cc: [email-masked] 
Cc: [email-masked] 
Cc: [email-masked]

--->8

Will Deacon (9):
  vhost/vsock: Avoid allocating arbitrarily-sized SKBs
  vsock/virtio: Validate length in packet header before skb_put()
  vsock/virtio: Move length check to callers of
    virtio_vsock_skb_rx_put()
  vsock/virtio: Resize receive buffers so that each SKB fits in a 4K
    page
  vsock/virtio: Rename virtio_vsock_alloc_skb()
  vsock/virtio: Move SKB allocation lower-bound check to callers
  vhost/vsock: Allocate nonlinear SKBs for handling large receive
    buffers
  vsock/virtio: Rename virtio_vsock_skb_rx_put()
  vsock/virtio: Allocate nonlinear SKBs for handling large transmit
    buffers

 drivers/vhost/vsock.c                   | 15 ++++----
 include/linux/virtio_vsock.h            | 46 +++++++++++++++++++------
 net/vmw_vsock/virtio_transport.c        | 20 ++++++++---
 net/vmw_vsock/virtio_transport_common.c |  3 +-
 4 files changed, 60 insertions(+), 24 deletions(-)

-- 
2.50.0.727.gbf7dc18ff4-goog