Commit 077ef851 authored Jul 05, 2023 by Florian Westphal Committed by Greg Kroah-Hartman Jul 27, 2023

netfilter: nf_tables: add rescheduling points during loop detection walks

[ 81ea010667417ef3f218dfd99b69769fe66c2b67 ]

Add explicit rescheduling points during ruleset walk.

Switching to a faster algorithm is possible but this is a much
smaller change, suitable for nf tree.

Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1460


Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 11352851

net/netfilter/nf_tables_api.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -2712,6 +2712,8 @@ int nft_chain_validate(const struct nft_ctx ctx, const struct nft_chain chain)
		if (err < 0)
		return err;
		}

		cond_resched();
		}

		return 0;
		@@ -7379,9 +7381,13 @@ static int nf_tables_check_loops(const struct nft_ctx *ctx,
		break;
		}
		}

		cond_resched();
		}

		list_for_each_entry(set, &ctx->table->sets, list) {
		cond_resched();

		if (!nft_is_active_next(ctx->net, set))
		continue;
		if (!(set->flags & NFT_SET_MAP) \|\|