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netfilter: nf_tables: fix scheduling-while-atomic splat 

commit 2024439bd5 upstream.

nf_tables_check_loops() can be called from rhashtable list
walk so cond_resched() cannot be used here.

Fixes: 81ea010667 ("netfilter: nf_tables: add rescheduling points during loop detection walks")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Florian Westphal 2022-08-11 13:30:39 +02:00 committed by Greg Kroah-Hartman
parent 97eaa2955d
commit d82ec7529c
1 changed files with 0 additions and 4 deletions
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4
net/netfilter/nf_tables_api.c
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@ -10044,13 +10044,9 @@ 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) ||