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kernel: fix crash in flow offload when removing net devices

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-03-23 20:09:23 +01:00
parent 2c7b0e9f31
commit db108cdf14
1 changed files with 5 additions and 3 deletions
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8
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
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@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
--- /dev/null
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -0,0 +1,338 @@
@@ -0,0 +1,340 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@ -121,6 +121,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+struct xt_flowoffload_hook {
+ struct hlist_node list;
+ struct nf_hook_ops ops;
+ struct net *net;
+ bool registered;
+ bool used;
+};
@ -201,8 +202,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ continue;
+
+ hook->registered = true;
+ hook->net = dev_net(hook->ops.dev);
+ spin_unlock_bh(&hooks_lock);
+ nf_register_net_hook(dev_net(hook->ops.dev), &hook->ops);
+ nf_register_net_hook(hook->net, &hook->ops);
+ spin_lock_bh(&hooks_lock);
+ goto restart;
+ }
@ -221,7 +223,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+ hlist_del(&hook->list);
+ spin_unlock_bh(&hooks_lock);
+ nf_unregister_net_hook(dev_net(hook->ops.dev), &hook->ops);
+ nf_unregister_net_hook(hook->net, &hook->ops);
+ kfree(hook);
+ spin_lock_bh(&hooks_lock);
+ goto restart;