diff mbox series

[5.12,453/700] netfilter: nf_tables: skip netlink portID validation if zero

Message ID 20210712061024.760339457@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman July 12, 2021, 6:08 a.m. UTC 
From: Pablo Neira Ayuso <pablo@netfilter.org>

[ Upstream commit 534799097a777e82910f77a4f9d289c815a9a64e ]

nft_table_lookup() allows us to obtain the table object by the name and
the family. The netlink portID validation needs to be skipped for the
dump path, since the ownership only applies to commands to update the
given table. Skip validation if the specified netlink PortID is zero
when calling nft_table_lookup().

Fixes: 6001a930ce03 ("netfilter: nftables: introduce table ownership")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nf_tables_api.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 9d5ea2352965..3705086d43f5 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -521,7 +521,7 @@  static struct nft_table *nft_table_lookup(const struct net *net,
 		    table->family == family &&
 		    nft_active_genmask(table, genmask)) {
 			if (nft_table_has_owner(table) &&
-			    table->nlpid != nlpid)
+			    nlpid && table->nlpid != nlpid)
 				return ERR_PTR(-EPERM);
 
 			return table;