[PATCH v2 0/8] vsock/virtio: SKB allocation improvements

[Will Deacon]

Hello again,

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

  https://lore.kernel.org/r/20250625131543.5155-1-will@xxxxxxxxxx

Changes since v1 include:

  * Remove virtio_vsock_alloc_skb_with_frags() and instead push decision
    to allocate nonlinear SKBs into virtio_vsock_alloc_skb()

  * Remove VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE and inline its definition
    along with a comment

  * Validate the length advertised by the packet header on the guest
    receive path

  * Minor tweaks to the commit messages and addition of stable tags

Thanks to Stefano for all the review feedback so far.

Cheers,

Will

Cc: Keir Fraser <keirf@xxxxxxxxxx>
Cc: Steven Moreland <smoreland@xxxxxxxxxx>
Cc: Frederick Mayle <fmayle@xxxxxxxxxx>
Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Cc: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: "Eugenio Pérez" <eperezma@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx 
Cc: netdev@xxxxxxxxxxxxxxx 
Cc: virtualization@xxxxxxxxxxxxxxx

--->8

Will Deacon (8):
  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 page
  vsock/virtio: Add vsock helper for linear SKB allocation
  vhost/vsock: Allocate nonlinear SKBs for handling large receive
    buffers
  vsock/virtio: Rename virtio_vsock_skb_rx_put() to
    virtio_vsock_skb_put()
  vsock/virtio: Allocate nonlinear SKBs for handling large transmit
    buffers

 drivers/vhost/vsock.c                   | 15 +++++-----
 include/linux/virtio_vsock.h            | 37 +++++++++++++++++++------
 net/vmw_vsock/virtio_transport.c        | 25 +++++++++++++----
 net/vmw_vsock/virtio_transport_common.c |  3 +-
 4 files changed, 59 insertions(+), 21 deletions(-)

-- 
2.50.0.727.gbf7dc18ff4-goog