diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-04-05 01:56:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-06 04:46:40 +0300 |
| commit | c383bdd14f91562babd269aa7c36b46fee7b6c75 (patch) | |
| tree | f46a23718a949591f4161dadc902368452d7858f | |
| parent | 2d2517ee314ef1de0517f74d06c2825fbf597ba3 (diff) | |
| download | linux-c383bdd14f91562babd269aa7c36b46fee7b6c75.tar.xz | |
nfp: fix potential use after free on xdp prog
We should unregister the net_device first, before we give back
our reference on xdp_prog. Otherwise xdp_prog may be freed
before .ndo_stop() disabled the datapath. Found by code inspection.
Fixes: ecd63a0217d5 ("nfp: add XDP support in the driver")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 9179a99563af..a41377e26c07 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -3275,9 +3275,10 @@ void nfp_net_netdev_clean(struct net_device *netdev) { struct nfp_net *nn = netdev_priv(netdev); + unregister_netdev(nn->netdev); + if (nn->xdp_prog) bpf_prog_put(nn->xdp_prog); if (nn->bpf_offload_xdp) nfp_net_xdp_offload(nn, NULL); - unregister_netdev(nn->netdev); } |