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    Subject[PATCH 5.4 013/165] netfilter: nf_tables_offload: Check for the NETDEV_UNREGISTER event
    Date
    From: wenxu <wenxu@ucloud.cn>

    [ Upstream commit d1f4c966475c6dd2545c6625022cb24e878bee11 ]

    Check for the NETDEV_UNREGISTER event from the nft_offload_netdev_event
    function, which is the event that actually triggers the clean up.

    Fixes: 06d392cbe3db ("netfilter: nf_tables_offload: remove rules when the device unregisters")
    Signed-off-by: wenxu <wenxu@ucloud.cn>
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    net/netfilter/nf_tables_offload.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
    index 5f6037695dee..6f7eab502e65 100644
    --- a/net/netfilter/nf_tables_offload.c
    +++ b/net/netfilter/nf_tables_offload.c
    @@ -446,6 +446,9 @@ static int nft_offload_netdev_event(struct notifier_block *this,
    struct net *net = dev_net(dev);
    struct nft_chain *chain;

    + if (event != NETDEV_UNREGISTER)
    + return NOTIFY_DONE;
    +
    mutex_lock(&net->nft.commit_mutex);
    chain = __nft_offload_get_chain(dev);
    if (chain)
    --
    2.20.1


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