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netfilter: nf_tables: set dormant flag on hook register failure 

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;
}