5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
[ Upstream commit d0009effa8862c20a13af4cb7475d9771b905693 ]
Several expressions explicitly refer to NF_INET_* hook definitions
from expr->ops->validate, however, family is not validated.
Bail out with EOPNOTSUPP in case they are used from unsupported
families.
Fixes: 0ca743a55991 ("netfilter: nf_tables: add compatibility layer for x_tables")
Fixes: a3c90f7a2323 ("netfilter: nf_tables: flow offload expression")
Fixes: 2fa841938c64 ("netfilter: nf_tables: introduce routing expression")
Fixes: 554ced0a6e29 ("netfilter: nf_tables: add support for native socket matching")
Fixes: ad49d86e07a4 ("netfilter: nf_tables: Add synproxy support")
Fixes: 4ed8eb6570a4 ("netfilter: nf_tables: Add native tproxy support")
Fixes: 6c47260250fc ("netfilter: nf_tables: add xfrm expression")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/netfilter/nft_compat.c | 12 ++++++++++++
net/netfilter/nft_flow_offload.c | 5 +++++
net/netfilter/nft_nat.c | 5 +++++
net/netfilter/nft_rt.c | 5 +++++
net/netfilter/nft_socket.c | 5 +++++
net/netfilter/nft_synproxy.c | 7 +++++--
net/netfilter/nft_tproxy.c | 5 +++++
net/netfilter/nft_xfrm.c | 5 +++++
8 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c
index b8dbd20a6a4c..3f1e272efbb9 100644
--- a/net/netfilter/nft_compat.c
+++ b/net/netfilter/nft_compat.c
@@ -327,6 +327,12 @@ static int nft_target_validate(const struct nft_ctx *ctx,
unsigned int hook_mask = 0;
int ret;
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_BRIDGE &&
+ ctx->family != NFPROTO_ARP)
+ return -EOPNOTSUPP;
+
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
@@ -569,6 +575,12 @@ static int nft_match_validate(const struct nft_ctx *ctx,
unsigned int hook_mask = 0;
int ret;
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_BRIDGE &&
+ ctx->family != NFPROTO_ARP)
+ return -EOPNOTSUPP;
+
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index a44340dd3ce6..c2a5d05f501f 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -150,6 +150,11 @@ static int nft_flow_offload_validate(const struct nft_ctx *ctx,
{
unsigned int hook_mask = (1 << NF_INET_FORWARD);
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
return nft_chain_validate_hooks(ctx->chain, hook_mask);
}
diff --git a/net/netfilter/nft_nat.c b/net/netfilter/nft_nat.c
index cd4eb4996aff..2e1ee7d9d9c3 100644
--- a/net/netfilter/nft_nat.c
+++ b/net/netfilter/nft_nat.c
@@ -142,6 +142,11 @@ static int nft_nat_validate(const struct nft_ctx *ctx,
struct nft_nat *priv = nft_expr_priv(expr);
int err;
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT);
if (err < 0)
return err;
diff --git a/net/netfilter/nft_rt.c b/net/netfilter/nft_rt.c
index bcd01a63e38f..f4a96164a5a1 100644
--- a/net/netfilter/nft_rt.c
+++ b/net/netfilter/nft_rt.c
@@ -166,6 +166,11 @@ static int nft_rt_validate(const struct nft_ctx *ctx, const struct nft_expr *exp
const struct nft_rt *priv = nft_expr_priv(expr);
unsigned int hooks;
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
switch (priv->key) {
case NFT_RT_NEXTHOP4:
case NFT_RT_NEXTHOP6:
diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index f6d517185d9c..826e5f8c78f3 100644
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -166,6 +166,11 @@ static int nft_socket_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **data)
{
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
return nft_chain_validate_hooks(ctx->chain,
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN) |
diff --git a/net/netfilter/nft_synproxy.c b/net/netfilter/nft_synproxy.c
index 1133e06f3c40..0806813d3a76 100644
--- a/net/netfilter/nft_synproxy.c
+++ b/net/netfilter/nft_synproxy.c
@@ -186,7 +186,6 @@ static int nft_synproxy_do_init(const struct nft_ctx *ctx,
break;
#endif
case NFPROTO_INET:
- case NFPROTO_BRIDGE:
err = nf_synproxy_ipv4_init(snet, ctx->net);
if (err)
goto nf_ct_failure;
@@ -219,7 +218,6 @@ static void nft_synproxy_do_destroy(const struct nft_ctx *ctx)
break;
#endif
case NFPROTO_INET:
- case NFPROTO_BRIDGE:
nf_synproxy_ipv4_fini(snet, ctx->net);
nf_synproxy_ipv6_fini(snet, ctx->net);
break;
@@ -253,6 +251,11 @@ static int nft_synproxy_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **data)
{
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
return nft_chain_validate_hooks(ctx->chain, (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_FORWARD));
}
diff --git a/net/netfilter/nft_tproxy.c b/net/netfilter/nft_tproxy.c
index f8d277e05ef4..6b606e83cdb6 100644
--- a/net/netfilter/nft_tproxy.c
+++ b/net/netfilter/nft_tproxy.c
@@ -293,6 +293,11 @@ static int nft_tproxy_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **data)
{
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
return nft_chain_validate_hooks(ctx->chain, 1 << NF_INET_PRE_ROUTING);
}
diff --git a/net/netfilter/nft_xfrm.c b/net/netfilter/nft_xfrm.c
index cbbbc4ecad3a..7f762fc42891 100644
--- a/net/netfilter/nft_xfrm.c
+++ b/net/netfilter/nft_xfrm.c
@@ -233,6 +233,11 @@ static int nft_xfrm_validate(const struct nft_ctx *ctx, const struct nft_expr *e
const struct nft_xfrm *priv = nft_expr_priv(expr);
unsigned int hooks;
+ if (ctx->family != NFPROTO_IPV4 &&
+ ctx->family != NFPROTO_IPV6 &&
+ ctx->family != NFPROTO_INET)
+ return -EOPNOTSUPP;
+
switch (priv->dir) {
case XFRM_POLICY_IN:
hooks = (1 << NF_INET_FORWARD) |
--
2.43.0
