[PATCH net 1/2] virtio_net: check AF_XDP queue index before use
From: Xiong Weimin <hidden>
Date: 2026-08-04 08:53:41
Also in:
lkml, virtualization
Subsystem:
networking drivers, the rest, virtio net driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Validate the AF_XDP queue index before dereferencing the receive or send queue arrays in virtnet_xsk_pool_enable(). This keeps an out of range queue id from reaching vi->rq[qid] while checking page_pool. Signed-off-by: Xiong Weimin <redacted> --- drivers/net/virtio_net.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3e2a5876c..6160aa8ba 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c@@ -5896,15 +5896,15 @@ static int virtnet_xsk_pool_enable(struct net_device *dev, if (vi->hdr_len > xsk_pool_get_headroom(pool)) return -EINVAL; + if (qid >= vi->curr_queue_pairs) + return -EINVAL; + /* In big_packets mode, xdp cannot work, so there is no need to * initialize xsk of rq. */ if (!vi->rq[qid].page_pool) return -ENOENT; - if (qid >= vi->curr_queue_pairs) - return -EINVAL; - sq = &vi->sq[qid]; rq = &vi->rq[qid];
--
2.43.0