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    Subject[PATCH 4.19 146/152] netfilter: nf_tables: fix flush after rule deletion in the same batch
    Date
    4.19-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Pablo Neira Ayuso <pablo@netfilter.org>

    commit 23b7ca4f745f21c2b9cfcb67fdd33733b3ae7e66 upstream.

    Flush after rule deletion bogusly hits -ENOENT. Skip rules that have
    been already from nft_delrule_by_chain() which is always called from the
    flush path.

    Fixes: cf9dc09d0949 ("netfilter: nf_tables: fix missing rules flushing per table")
    Reported-by: Phil Sutter <phil@nwl.cc>
    Acked-by: Phil Sutter <phil@nwl.cc>
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    net/netfilter/nf_tables_api.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/netfilter/nf_tables_api.c
    +++ b/net/netfilter/nf_tables_api.c
    @@ -291,6 +291,9 @@ static int nft_delrule_by_chain(struct n
    int err;

    list_for_each_entry(rule, &ctx->chain->rules, list) {
    + if (!nft_is_active_next(ctx->net, rule))
    + continue;
    +
    err = nft_delrule(ctx, rule);
    if (err < 0)
    return err;

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