virtio_net: Fix resize of the RX ring

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When a AF_XDP socket is attached, the virtnet_rx_resize
should resize the rq->xsk_buffs XSK buffer array. Otherwise,
when the size grows, the virtnet_rx_resume() causes a write
past the end of the array. This is easily reproducable with

    ethtool -G ens3 rx 32
    ./xdpsock -i eth0 -q 0 -r -z &
    ethtool -G eth0 rx 256

Fixes: e9f3962441 ("virtio_net: xsk: rx: support fill with xsk buffer")
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Link: https://patch.msgid.link/20260810120728.47445-1-a.s.protopopov@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Anton Protopopov 2026-08-10 12:07:25 +00:00 • committed by Jakub Kicinski

parent 7f16289b91

commit d09c98a6da

1 changed files with 14 additions and 0 deletions

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drivers/net/virtio_net.c

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