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| author |   Xin Long <lucien.xin@gmail.com> | 2022-05-15 21:37:27 -0400 |
|---|---|---|
| committer |   Paolo Abeni <pabeni@redhat.com> | 2022-05-17 11:02:07 +0200 |
| commit | 4d33ab08c0af140752a46f227a6bf97dab1e17b4 (patch) | |
| tree | 5a9e298e8b71a4e510a4c48d99fb86b84df37dc5 /net/xfrm/xfrm_policy.c | |
| parent | net: systemport: Fix an error handling path in bcm_sysport_probe() (diff) | |
| download | linux-dev-4d33ab08c0af140752a46f227a6bf97dab1e17b4.tar.xz linux-dev-4d33ab08c0af140752a46f227a6bf97dab1e17b4.zip | |
xfrm: set dst dev to blackhole_netdev instead of loopback_dev in ifdown
The global blackhole_netdev has replaced pernet loopback_dev to become the
one given to the object that holds an netdev when ifdown in many places of
ipv4 and ipv6 since commit 8d7017fd621d ("blackhole_netdev: use
blackhole_netdev to invalidate dst entries").
Especially after commit faab39f63c1f ("net: allow out-of-order netdev
unregistration"), it's no longer safe to use loopback_dev that may be
freed before other netdev.
This patch is to set dst dev to blackhole_netdev instead of loopback_dev
in ifdown.
v1->v2:
- add Fixes tag as Eric suggested.
Fixes: faab39f63c1f ("net: allow out-of-order netdev unregistration")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/e8c87482998ca6fcdab214f5a9d582899ec0c648.1652665047.git.lucien.xin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/xfrm/xfrm_policy.c')
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 00bd0ecff5a1..f1876ea61fdc 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -3744,7 +3744,7 @@ static int stale_bundle(struct dst_entry *dst) void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev) { while ((dst = xfrm_dst_child(dst)) && dst->xfrm && dst->dev == dev) { - dst->dev = dev_net(dev)->loopback_dev; + dst->dev = blackhole_netdev; dev_hold(dst->dev); dev_put(dev); } |