Commit 9cc0001a authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
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netfilter: nftables: disallow updates on table ownership 



Disallow updating the ownership bit on an existing table: Do not allow
to grab ownership on an existing table. Do not allow to drop ownership
on an existing table.

Fixes: 6001a930 ("netfilter: nftables: introduce table ownership")
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 8e24eddd

net/netfilter/nf_tables_api.c

+6 −0
Original line number Diff line number Diff line
@@ -916,6 +916,12 @@ static int nf_tables_updtable(struct nft_ctx *ctx) 
	if (flags == ctx->table->flags)

		return 0;



	if ((nft_table_has_owner(ctx->table) &&

	     !(flags & NFT_TABLE_F_OWNER)) ||

	    (!nft_table_has_owner(ctx->table) &&

	     flags & NFT_TABLE_F_OWNER))

		return -EOPNOTSUPP;



	trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,

				sizeof(struct nft_trans_table));

	if (trans == NULL)