This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: add rescheduling points during loop detection walks
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfilter-nf_tables-add-rescheduling-points-during-l.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4a32dc585d23095db5a157c744287d5f6bcef5ca
Author: Florian Westphal <fw@xxxxxxxxx>
Date: Tue Jul 26 12:44:35 2022 +0200
netfilter: nf_tables: add rescheduling points during loop detection walks
[ Upstream commit 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@xxxxxxxxx>
Acked-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 15cc05bc65f1..ac1cee5803ec 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2551,6 +2551,8 @@ int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
if (err < 0)
return err;
}
+
+ cond_resched();
}
return 0;
@@ -6910,9 +6912,13 @@ 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) ||
