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authorJason Wang <jasowang@redhat.com>2023-07-25 03:20:49 -0400
committerJakub Kicinski <kuba@kernel.org>2023-07-26 22:09:42 -0700
commit25266128fe16d5632d43ada34c847d7b8daba539 (patch)
tree8b76692de2e1046986ffbafb4a9052b9f3da0c66 /drivers/net
parent6c58c8816abb7b93b21fa3b1d0c1726402e5e568 (diff)
virtio-net: fix race between set queues and probe
A race were found where set_channels could be called after registering but before virtnet_set_queues() in virtnet_probe(). Fixing this by moving the virtnet_set_queues() before netdevice registering. While at it, use _virtnet_set_queues() to avoid holding rtnl as the device is not even registered at that time. Cc: stable@vger.kernel.org Fixes: a220871be66f ("virtio-net: correctly enable multiqueue") Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Link: https://lore.kernel.org/r/20230725072049.617289-1-jasowang@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/virtio_net.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0db14f6b87d3..1270c8d23463 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -4219,6 +4219,8 @@ static int virtnet_probe(struct virtio_device *vdev)
if (vi->has_rss || vi->has_rss_hash_report)
virtnet_init_default_rss(vi);
+ _virtnet_set_queues(vi, vi->curr_queue_pairs);
+
/* serialize netdev register + virtio_device_ready() with ndo_open() */
rtnl_lock();
@@ -4257,8 +4259,6 @@ static int virtnet_probe(struct virtio_device *vdev)
goto free_unregister_netdev;
}
- virtnet_set_queues(vi, vi->curr_queue_pairs);
-
/* Assume link up if device can't report link status,
otherwise get link status from config. */
netif_carrier_off(dev);