5.4-stable review patch. If anyone has any objections, please let me know.
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From: Florian Westphal fw@strlen.de
[ Upstream commit bccebf64701735533c8db37773eeacc6566cc8ec ]
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: 179d9ba5559a ("netfilter: nf_tables: fix table flag updates") Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_tables_api.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 6c83d3e169c9c..c5dbb950822fd 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -951,6 +951,7 @@ 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; }