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netfilter: nf_tables: set dormant flag on hook register failure

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We need to set the dormant flag again if we fail to register
the hooks.

During memory pressure hook registration can fail and we end up
with a table marked as active but no registered hooks.

On table/base chain deletion, nf_tables will attempt to unregister
the hook again which yields a warn splat from the nftables core.

Reported-and-tested-by: syzbot+de4025c006ec68ac56fc@syzkaller.appspotmail.com
Fixes: 179d9ba555 ("netfilter: nf_tables: fix table flag updates")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2024-02-19 16:58:04 +01:00 committed by Pablo Neira Ayuso
parent 40b9385dd8
commit bccebf6470
1 changed files with 1 additions and 0 deletions
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net/netfilter/nf_tables_api.c
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@ -1251,6 +1251,7 @@ static int nf_tables_updtable(struct nft_ctx *ctx)
return 0;
err_register_hooks:
ctx->table->flags |= NFT_TABLE_F_DORMANT;
nft_trans_destroy(trans);
return ret;
}