Merge tag 'nf-next-26-07-02' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next

Florian Westphal says:

====================
netfilter: updates for net-next

The following patchset contains Netfilter updates for *net-next*.

1) Update nfnetlink_hook to dump the individual NAT type chains
instead of the nat base chains to userspace. From Phil Sutter.

2) Replace strlcpy/strlcat() with snprintf() in x_tables, from Ian Bridges.

3) Start replacing u_int8_t and u_int16t with u8 and u16 in netfilter.
From Carlos Grillet.

4) Replace strcpy() with strscpy() in netfilter, from David Laight.

5) Remove redundant NULL check before kvfree().

6) Add parameter validation to xt_tcpmss. Ensure mss_min <= mss_max and
invert <= 1.  From Feng Wu.

7) Add checkentry for xt_dscp 'tos' match. Implement tos_mt_check() to reject
invalid invert values.  Also from Feng Wu.

8) Stop hashing nf_conntrack_helper by tuple. Switch to hashing by name and
L4 protocol.

9) Remove tuples from conntrack helper definitions and port usage from
broadcast helpers. Add netlink policy validation to prevent protocol
number truncation.

10) Remove obsolete netfilter conntrack module parameters.

11) Bound num_counters in ebtables: do_replace() by MAX_EBT_ENTRIES to prevent
oversized vmalloc_array() allocations.  From Jiayuan Chen.

12) Make expectations created via nft_ct rules work with NAT.

netfilter pull request nf-next-26-07-02

* tag 'nf-next-26-07-02' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
  netfilter: nft_ct: support expectation creation for natted flows
  netfilter: ebtables: bound num_counters like nentries in do_replace()
  netfilter: conntrack: remove obsolete module parameters
  netfilter: conntrack: get rid of tuple in helper definitions
  netfilter: nf_conntrack_helper: do not hash by tuple
  netfilter: xt_dscp: add checkentry for tos match
  netfilter: xt_tcpmss: add checkentry for parameter validation
  netfilter: remove redundant null check before kvfree()
  netfilter: avoid strcpy usage
  netfilter: replace u_int8_t and u_int16t with u8 and u16
  netfilter: x_tables: replace strlcat() with snprintf()
  netfilter: nfnetlink_hook: Dump nat type chains
====================

Link: https://patch.msgid.link/20260702105003.13550-1-fw@strlen.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

7 files changed, 12 insertions, 15 deletions

diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index efbbfa770d66..e99afc1414cd 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -93,6 +93,7 @@ enum nf_hook_ops_type {
 	NF_HOOK_OP_NF_TABLES,
 	NF_HOOK_OP_BPF,
 	NF_HOOK_OP_NFT_FT,
+	NF_HOOK_OP_NAT,
 };
 
 struct nf_hook_ops {
@@ -140,6 +141,12 @@ struct nf_hook_entries {
 	 */
 };
 
+struct nf_nat_lookup_hook_priv {
+	struct nf_hook_entries __rcu *entries;
+
+	struct rcu_head rcu_head;
+};
+
 #ifdef CONFIG_NETFILTER
 static inline struct nf_hook_ops **nf_hook_entries_get_hook_ops(const struct nf_hook_entries *e)
 {
diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h
index 81286c499325..b15f37604cde 100644
--- a/include/linux/netfilter/nf_conntrack_h323.h
+++ b/include/linux/netfilter/nf_conntrack_h323.h
@@ -9,8 +9,6 @@
 #include <net/netfilter/nf_conntrack_expect.h>
 #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h>
 
-#define RAS_PORT 1719
-#define Q931_PORT 1720
 #define H323_RTP_CHANNEL_MAX 4	/* Audio, video, FAX and other */
 
 /* This structure exists only once per master */
diff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h
index c3bdb4370938..c0b305ce7c3c 100644
--- a/include/linux/netfilter/nf_conntrack_pptp.h
+++ b/include/linux/netfilter/nf_conntrack_pptp.h
@@ -50,8 +50,6 @@ struct nf_nat_pptp {
 	__be16 pac_call_id;			/* NAT'ed PAC call id */
 };
 
-#define PPTP_CONTROL_PORT	1723
-
 #define PPTP_PACKET_CONTROL	1
 #define PPTP_PACKET_MGMT	2
 
diff --git a/include/linux/netfilter/nf_conntrack_sane.h b/include/linux/netfilter/nf_conntrack_sane.h
index 46c7acd1b4a7..8501035d7335 100644
--- a/include/linux/netfilter/nf_conntrack_sane.h
+++ b/include/linux/netfilter/nf_conntrack_sane.h
@@ -3,8 +3,6 @@
 #define _NF_CONNTRACK_SANE_H
 /* SANE tracking. */
 
-#define SANE_PORT	6566
-
 enum sane_state {
 	SANE_STATE_NORMAL,
 	SANE_STATE_START_REQUESTED,
diff --git a/include/linux/netfilter/nf_conntrack_tftp.h b/include/linux/netfilter/nf_conntrack_tftp.h
index 90b334bbce3c..e3d1739c557d 100644
--- a/include/linux/netfilter/nf_conntrack_tftp.h
+++ b/include/linux/netfilter/nf_conntrack_tftp.h
@@ -2,8 +2,6 @@
 #ifndef _NF_CONNTRACK_TFTP_H
 #define _NF_CONNTRACK_TFTP_H
 
-#define TFTP_PORT 69
-
 #include <linux/netfilter.h>
 #include <linux/skbuff.h>
 #include <linux/types.h>
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 49297fec448a..ed2e9bc1bb4e 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -2123,7 +2123,7 @@ void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
 			    int outin);
 int ip_vs_confirm_conntrack(struct sk_buff *skb);
 void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
-			       struct ip_vs_conn *cp, u_int8_t proto,
+			       struct ip_vs_conn *cp, u8 proto,
 			       const __be16 port, int from_rs);
 void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
 
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
index c761cd8158b2..bc5427d239f4 100644
--- a/include/net/netfilter/nf_conntrack_helper.h
+++ b/include/net/netfilter/nf_conntrack_helper.h
@@ -43,11 +43,10 @@ struct nf_conntrack_helper {
 
 	refcount_t ct_refcnt;
 
-	/* Tuple of things we will help (compared against server response) */
-	struct nf_conntrack_tuple tuple;
+	u8 nfproto;	/* NFPROTO_*, can be NFPROTO_UNSPEC */
+	u8 l4proto;	/* IPPROTO_UDP/TCP */
 
-	/* Function to call when data passes; return verdict, or -1 to
-           invalidate. */
+	/* Function to call when data passes; return verdict */
 	int __rcu (*help)(struct sk_buff *skb, unsigned int protoff,
 			  struct nf_conn *ct,
 			  enum ip_conntrack_info conntrackinfo);
@@ -94,8 +93,7 @@ struct nf_conntrack_helper *nf_conntrack_helper_try_module_get(const char *name,
 void nf_conntrack_helper_put(struct nf_conntrack_helper *helper);
 
 void nf_ct_helper_init(struct nf_conntrack_helper *helper,
-		       u16 l3num, u16 protonum, const char *name,
-		       u16 default_port, u16 spec_port, u32 id,
+		       u8 l3num, u16 protonum, const char *name,
 		       const struct nf_conntrack_expect_policy *exp_pol,
 		       u32 expect_class_max,
 		       int (*help)(struct sk_buff *skb, unsigned int protoff,