virtio-net: drop the multi-buffer XDP packet in zerocopy

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commit 1ab6658174 upstream.

In virtio-net, we have not yet supported multi-buffer XDP packet in
zerocopy mode when there is a binding XDP program. However, in that
case, when receiving multi-buffer XDP packet, we skip the XDP program
and return XDP_PASS. As a result, the packet is passed to normal network
stack which is an incorrect behavior (e.g. a XDP program for packet
count is installed, multi-buffer XDP packet arrives and does go through
XDP program. As a result, the packet count does not increase but the
packet is still received from network stack).This commit instead returns
XDP_ABORTED in that case.

Fixes: 99c861b44e ("virtio_net: xsk: rx: support recv merge mode")
Cc: stable@vger.kernel.org
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Link: https://patch.msgid.link/20251022155630.49272-1-minhquangbui99@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Bui Quang Minh 2025-10-22 22:56:30 +07:00 • committed by Greg Kroah-Hartman

parent 1cf52204e7

commit e4c53dc37e

1 changed files with 8 additions and 3 deletions

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drivers/net/virtio_net.c

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