[PATCH net 0/6] Netfilter fixes for net

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Remove unused variable causing compilation warning in nft_set_rbtree,
   from Yang Li. This unused variable is a left over from previous
   merge window.

2) Possible return of uninitialized in nf_conntrack_bridge, from
   Linkui Xiao. This is there since nf_conntrack_bridge is available.

3) Fix incorrect pointer math in nft_byteorder, from Dan Carpenter.
   Problem has been there since 2016.

4) Fix bogus error in destroy set element command. Problem is there
   since this new destroy command was added.

5) Fix race condition in ipset between swap and destroy commands and
   add/del/test control plane. This problem is there since ipset was
   merged.

6) Split async and sync catchall GC in two function to fix unsafe
   iteration over RCU. This is a fix-for-fix that was included in
   the previous pull request.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-23-11-15

Thanks.

----------------------------------------------------------------

The following changes since commit 4b7b492615cf3017190f55444f7016812b66611d:

  af_unix: fix use-after-free in unix_stream_read_actor() (2023-11-14 10:51:13 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-23-11-15

for you to fetch changes up to 8837ba3e58ea1e3d09ae36db80b1e80853aada95:

  netfilter: nf_tables: split async and sync catchall in two functions (2023-11-14 16:16:21 +0100)

----------------------------------------------------------------
netfilter pull request 23-11-15

----------------------------------------------------------------
Dan Carpenter (1):
      netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval()

Jozsef Kadlecsik (1):
      netfilter: ipset: fix race condition between swap/destroy and kernel side add/del/test

Linkui Xiao (1):
      netfilter: nf_conntrack_bridge: initialize err to 0

Pablo Neira Ayuso (2):
      netfilter: nf_tables: bogus ENOENT when destroying element which does not exist
      netfilter: nf_tables: split async and sync catchall in two functions

Yang Li (1):
      netfilter: nft_set_rbtree: Remove unused variable nft_net

 include/net/netfilter/nf_tables.h          |  4 +-
 net/bridge/netfilter/nf_conntrack_bridge.c |  2 +-
 net/netfilter/ipset/ip_set_core.c          | 14 +++----
 net/netfilter/nf_tables_api.c              | 60 ++++++++++++++++--------------
 net/netfilter/nft_byteorder.c              |  5 ++-
 net/netfilter/nft_meta.c                   |  2 +-
 net/netfilter/nft_set_rbtree.c             |  2 -
 7 files changed, 47 insertions(+), 42 deletions(-)

[PATCH net 1/6] netfilter: nft_set_rbtree: Remove unused variable nft_net

[Pablo Neira Ayuso]

From: Yang Li <yang.lee@linux.alibaba.com>

The code that uses nft_net has been removed, and the nft_pernet function
is merely obtaining a reference to shared data through the net pointer.
The content of the net pointer is not modified or changed, so both of
them should be removed.

silence the warning:
net/netfilter/nft_set_rbtree.c:627:26: warning: variable ‘nft_net’ set but not used

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7103
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_set_rbtree.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index 6f1186abd47b..baa3fea4fe65 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -624,14 +624,12 @@ static void nft_rbtree_gc(struct nft_set *set)
 {
 	struct nft_rbtree *priv = nft_set_priv(set);
 	struct nft_rbtree_elem *rbe, *rbe_end = NULL;
-	struct nftables_pernet *nft_net;
 	struct rb_node *node, *next;
 	struct nft_trans_gc *gc;
 	struct net *net;
 
 	set  = nft_set_container_of(priv);
 	net  = read_pnet(&set->net);
-	nft_net = nft_pernet(net);
 
 	gc = nft_trans_gc_alloc(set, 0, GFP_KERNEL);
 	if (!gc)
-- 
2.30.2

[PATCH net 2/6] netfilter: nf_conntrack_bridge: initialize err to 0

[Pablo Neira Ayuso]

From: Linkui Xiao <xiaolinkui@kylinos.cn>

K2CI reported a problem:

	consume_skb(skb);
	return err;
[nf_br_ip_fragment() error]  uninitialized symbol 'err'.

err is not initialized, because returning 0 is expected, initialize err
to 0.

Fixes: 3c171f496ef5 ("netfilter: bridge: add connection tracking system")
Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: Linkui Xiao <xiaolinkui@kylinos.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/bridge/netfilter/nf_conntrack_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c
index b5c406a6e765..abb090f94ed2 100644
--- a/net/bridge/netfilter/nf_conntrack_bridge.c
+++ b/net/bridge/netfilter/nf_conntrack_bridge.c
@@ -37,7 +37,7 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk,
 	ktime_t tstamp = skb->tstamp;
 	struct ip_frag_state state;
 	struct iphdr *iph;
-	int err;
+	int err = 0;
 
 	/* for offloaded checksums cleanup checksum before fragmentation */
 	if (skb->ip_summed == CHECKSUM_PARTIAL &&
-- 
2.30.2

[PATCH net 3/6] netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval()

[Pablo Neira Ayuso]

From: Dan Carpenter <dan.carpenter@linaro.org>

The problem is in nft_byteorder_eval() where we are iterating through a
loop and writing to dst[0], dst[1], dst[2] and so on...  On each
iteration we are writing 8 bytes.  But dst[] is an array of u32 so each
element only has space for 4 bytes.  That means that every iteration
overwrites part of the previous element.

I spotted this bug while reviewing commit caf3ef7468f7 ("netfilter:
nf_tables: prevent OOB access in nft_byteorder_eval") which is a related
issue.  I think that the reason we have not detected this bug in testing
is that most of time we only write one element.

Fixes: ce1e7989d989 ("netfilter: nft_byteorder: provide 64bit le/be conversion")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_tables.h | 4 ++--
 net/netfilter/nft_byteorder.c     | 5 +++--
 net/netfilter/nft_meta.c          | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 3bbd13ab1ecf..b157c5cafd14 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -178,9 +178,9 @@ static inline __be32 nft_reg_load_be32(const u32 *sreg)
 	return *(__force __be32 *)sreg;
 }
 
-static inline void nft_reg_store64(u32 *dreg, u64 val)
+static inline void nft_reg_store64(u64 *dreg, u64 val)
 {
-	put_unaligned(val, (u64 *)dreg);
+	put_unaligned(val, dreg);
 }
 
 static inline u64 nft_reg_load64(const u32 *sreg)
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index e596d1a842f7..f6e791a68101 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -38,13 +38,14 @@ void nft_byteorder_eval(const struct nft_expr *expr,
 
 	switch (priv->size) {
 	case 8: {
+		u64 *dst64 = (void *)dst;
 		u64 src64;
 
 		switch (priv->op) {
 		case NFT_BYTEORDER_NTOH:
 			for (i = 0; i < priv->len / 8; i++) {
 				src64 = nft_reg_load64(&src[i]);
-				nft_reg_store64(&dst[i],
+				nft_reg_store64(&dst64[i],
 						be64_to_cpu((__force __be64)src64));
 			}
 			break;
@@ -52,7 +53,7 @@ void nft_byteorder_eval(const struct nft_expr *expr,
 			for (i = 0; i < priv->len / 8; i++) {
 				src64 = (__force __u64)
 					cpu_to_be64(nft_reg_load64(&src[i]));
-				nft_reg_store64(&dst[i], src64);
+				nft_reg_store64(&dst64[i], src64);
 			}
 			break;
 		}
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index f7da7c43333b..ba0d3683a45d 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -63,7 +63,7 @@ nft_meta_get_eval_time(enum nft_meta_keys key,
 {
 	switch (key) {
 	case NFT_META_TIME_NS:
-		nft_reg_store64(dest, ktime_get_real_ns());
+		nft_reg_store64((u64 *)dest, ktime_get_real_ns());
 		break;
 	case NFT_META_TIME_DAY:
 		nft_reg_store8(dest, nft_meta_weekday());
-- 
2.30.2

[PATCH net 4/6] netfilter: nf_tables: bogus ENOENT when destroying element which does not exist

[Pablo Neira Ayuso]

destroy element command bogusly reports ENOENT in case a set element
does not exist. ENOENT errors are skipped, however, err is still set
and propagated to userspace.

 # nft destroy element ip raw BLACKLIST { 1.2.3.4 }
 Error: Could not process rule: No such file or directory
 destroy element ip raw BLACKLIST { 1.2.3.4 }
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fixes: f80a612dd77c ("netfilter: nf_tables: add support to destroy operation")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index a761ee6796f6..debea1c67701 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -7263,10 +7263,11 @@ static int nf_tables_delsetelem(struct sk_buff *skb,
 
 		if (err < 0) {
 			NL_SET_BAD_ATTR(extack, attr);
-			break;
+			return err;
 		}
 	}
-	return err;
+
+	return 0;
 }
 
 /*
-- 
2.30.2

[PATCH net 5/6] netfilter: ipset: fix race condition between swap/destroy and kernel side add/del/test

[Pablo Neira Ayuso]

From: Jozsef Kadlecsik <kadlec@netfilter.org>

Linkui Xiao reported that there's a race condition when ipset swap and destroy is
called, which can lead to crash in add/del/test element operations. Swap then
destroy are usual operations to replace a set with another one in a production
system. The issue can in some cases be reproduced with the script:

ipset create hash_ip1 hash:net family inet hashsize 1024 maxelem 1048576
ipset add hash_ip1 172.20.0.0/16
ipset add hash_ip1 192.168.0.0/16
iptables -A INPUT -m set --match-set hash_ip1 src -j ACCEPT
while [ 1 ]
do
	# ... Ongoing traffic...
        ipset create hash_ip2 hash:net family inet hashsize 1024 maxelem 1048576
        ipset add hash_ip2 172.20.0.0/16
        ipset swap hash_ip1 hash_ip2
        ipset destroy hash_ip2
        sleep 0.05
done

In the race case the possible order of the operations are

	CPU0			CPU1
	ip_set_test
				ipset swap hash_ip1 hash_ip2
				ipset destroy hash_ip2
	hash_net_kadt

Swap replaces hash_ip1 with hash_ip2 and then destroy removes hash_ip2 which
is the original hash_ip1. ip_set_test was called on hash_ip1 and because destroy
removed it, hash_net_kadt crashes.

The fix is to force ip_set_swap() to wait for all readers to finish accessing the
old set pointers by calling synchronize_rcu().

The first version of the patch was written by Linkui Xiao <xiaolinkui@kylinos.cn>.

v2: synchronize_rcu() is moved into ip_set_swap() in order not to burden
    ip_set_destroy() unnecessarily when all sets are destroyed.
v3: Florian Westphal pointed out that all netfilter hooks run with rcu_read_lock() held
    and em_ipset.c wraps the entire ip_set_test() in rcu read lock/unlock pair.
    So there's no need to extend the rcu read locked area in ipset itself.

Closes: https://lore.kernel.org/all/69e7963b-e7f8-3ad0-210-7b86eebf7f78@netfilter.org/
Reported by: Linkui Xiao <xiaolinkui@kylinos.cn>
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/ipset/ip_set_core.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index 35d2f9c9ada0..4c133e06be1d 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -61,6 +61,8 @@ MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET);
 	ip_set_dereference((inst)->ip_set_list)[id]
 #define ip_set_ref_netlink(inst,id)	\
 	rcu_dereference_raw((inst)->ip_set_list)[id]
+#define ip_set_dereference_nfnl(p)	\
+	rcu_dereference_check(p, lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET))
 
 /* The set types are implemented in modules and registered set types
  * can be found in ip_set_type_list. Adding/deleting types is
@@ -708,15 +710,10 @@ __ip_set_put_netlink(struct ip_set *set)
 static struct ip_set *
 ip_set_rcu_get(struct net *net, ip_set_id_t index)
 {
-	struct ip_set *set;
 	struct ip_set_net *inst = ip_set_pernet(net);
 
-	rcu_read_lock();
-	/* ip_set_list itself needs to be protected */
-	set = rcu_dereference(inst->ip_set_list)[index];
-	rcu_read_unlock();
-
-	return set;
+	/* ip_set_list and the set pointer need to be protected */
+	return ip_set_dereference_nfnl(inst->ip_set_list)[index];
 }
 
 static inline void
@@ -1397,6 +1394,9 @@ static int ip_set_swap(struct sk_buff *skb, const struct nfnl_info *info,
 	ip_set(inst, to_id) = from;
 	write_unlock_bh(&ip_set_ref_lock);
 
+	/* Make sure all readers of the old set pointers are completed. */
+	synchronize_rcu();
+
 	return 0;
 }
 
-- 
2.30.2

[PATCH net 6/6] netfilter: nf_tables: split async and sync catchall in two functions

[Pablo Neira Ayuso]

list_for_each_entry_safe() does not work for the async case which runs
under RCU, therefore, split GC logic for catchall in two functions
instead, one for each of the sync and async GC variants.

The catchall sync GC variant never sees a _DEAD bit set on ever, thus,
this handling is removed in such case, moreover, allocate GC sync batch
via GFP_KERNEL.

Fixes: 93995bf4af2c ("netfilter: nf_tables: remove catchall element in GC sync path")
Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 55 +++++++++++++++++++----------------
 1 file changed, 30 insertions(+), 25 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index debea1c67701..c0a42989b982 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -9680,16 +9680,14 @@ void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans)
 	call_rcu(&trans->rcu, nft_trans_gc_trans_free);
 }
 
-static struct nft_trans_gc *nft_trans_gc_catchall(struct nft_trans_gc *gc,
-						  unsigned int gc_seq,
-						  bool sync)
+struct nft_trans_gc *nft_trans_gc_catchall_async(struct nft_trans_gc *gc,
+						 unsigned int gc_seq)
 {
-	struct nft_set_elem_catchall *catchall, *next;
+	struct nft_set_elem_catchall *catchall;
 	const struct nft_set *set = gc->set;
-	struct nft_elem_priv *elem_priv;
 	struct nft_set_ext *ext;
 
-	list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
+	list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
 		ext = nft_set_elem_ext(set, catchall->elem);
 
 		if (!nft_set_elem_expired(ext))
@@ -9699,35 +9697,42 @@ static struct nft_trans_gc *nft_trans_gc_catchall(struct nft_trans_gc *gc,
 
 		nft_set_elem_dead(ext);
 dead_elem:
-		if (sync)
-			gc = nft_trans_gc_queue_sync(gc, GFP_ATOMIC);
-		else
-			gc = nft_trans_gc_queue_async(gc, gc_seq, GFP_ATOMIC);
-
+		gc = nft_trans_gc_queue_async(gc, gc_seq, GFP_ATOMIC);
 		if (!gc)
 			return NULL;
 
-		elem_priv = catchall->elem;
-		if (sync) {
-			nft_setelem_data_deactivate(gc->net, gc->set, elem_priv);
-			nft_setelem_catchall_destroy(catchall);
-		}
-
-		nft_trans_gc_elem_add(gc, elem_priv);
+		nft_trans_gc_elem_add(gc, catchall->elem);
 	}
 
 	return gc;
 }
 
-struct nft_trans_gc *nft_trans_gc_catchall_async(struct nft_trans_gc *gc,
-						 unsigned int gc_seq)
-{
-	return nft_trans_gc_catchall(gc, gc_seq, false);
-}
-
 struct nft_trans_gc *nft_trans_gc_catchall_sync(struct nft_trans_gc *gc)
 {
-	return nft_trans_gc_catchall(gc, 0, true);
+	struct nft_set_elem_catchall *catchall, *next;
+	const struct nft_set *set = gc->set;
+	struct nft_elem_priv *elem_priv;
+	struct nft_set_ext *ext;
+
+	WARN_ON_ONCE(!lockdep_commit_lock_is_held(gc->net));
+
+	list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
+		ext = nft_set_elem_ext(set, catchall->elem);
+
+		if (!nft_set_elem_expired(ext))
+			continue;
+
+		gc = nft_trans_gc_queue_sync(gc, GFP_KERNEL);
+		if (!gc)
+			return NULL;
+
+		elem_priv = catchall->elem;
+		nft_setelem_data_deactivate(gc->net, gc->set, elem_priv);
+		nft_setelem_catchall_destroy(catchall);
+		nft_trans_gc_elem_add(gc, elem_priv);
+	}
+
+	return gc;
 }
 
 static void nf_tables_module_autoload_cleanup(struct net *net)
-- 
2.30.2

Re: [PATCH net 1/6] netfilter: nft_set_rbtree: Remove unused variable nft_net

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net.git (main)
by Pablo Neira Ayuso <pablo@netfilter.org>:

On Wed, 15 Nov 2023 19:45:09 +0100 you wrote:
> From: Yang Li <yang.lee@linux.alibaba.com>
> 
> The code that uses nft_net has been removed, and the nft_pernet function
> is merely obtaining a reference to shared data through the net pointer.
> The content of the net pointer is not modified or changed, so both of
> them should be removed.
> 
> [...]

Here is the summary with links:
  - [net,1/6] netfilter: nft_set_rbtree: Remove unused variable nft_net
    https://git.kernel.org/netdev/net/c/67059b61597c
  - [net,2/6] netfilter: nf_conntrack_bridge: initialize err to 0
    https://git.kernel.org/netdev/net/c/a44af08e3d4d
  - [net,3/6] netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval()
    https://git.kernel.org/netdev/net/c/c301f0981fdd
  - [net,4/6] netfilter: nf_tables: bogus ENOENT when destroying element which does not exist
    https://git.kernel.org/netdev/net/c/a7d5a955bfa8
  - [net,5/6] netfilter: ipset: fix race condition between swap/destroy and kernel side add/del/test
    https://git.kernel.org/netdev/net/c/28628fa952fe
  - [net,6/6] netfilter: nf_tables: split async and sync catchall in two functions
    https://git.kernel.org/netdev/net/c/8837ba3e58ea

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

Patch #1 syzbot reports that nf_reinject() could be called without
	 rcu_read_lock() when flushing pending packets at nfnetlink
	 queue removal, from Eric Dumazet.

Patch #2 flushes ipset list:set when canceling garbage collection to
	 reference to other lists to fix a race, from Jozsef Kadlecsik.

Patch #3 restores q-in-q matching with nft_payload by reverting
	 f6ae9f120dad ("netfilter: nft_payload: add C-VLAN support").

Patch #4 fixes vlan mangling in skbuff when vlan offload is present
	 in skbuff, without this patch nft_payload corrupts packets
	 in this case.

Patch #5 fixes possible nul-deref in tproxy no IP address is found in
	 netdevice, reported by syzbot and patch from Florian Westphal.

Patch #6 removes a superfluous restriction which prevents loose fib
	 lookups from input and forward hooks, from Eric Garver.

My assessment is that patches #1, #2 and #5 address possible kernel
crash, anything else in this batch fixes broken features.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-24-05-23

Thanks.

----------------------------------------------------------------

The following changes since commit 4b377b4868ef17b040065bd468668c707d2477a5:

  kprobe/ftrace: fix build error due to bad function definition (2024-05-17 19:17:55 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-05-23

for you to fetch changes up to 4878baa295a377fa9116dbeb43208272efc1cb1b:

  netfilter: nft_fib: allow from forward/input without iif selector (2024-05-21 16:37:01 +0200)

----------------------------------------------------------------
netfilter pull request 24-05-23

----------------------------------------------------------------
Alexander Maltsev (1):
      netfilter: ipset: Add list flush to cancel_gc

Eric Dumazet (1):
      netfilter: nfnetlink_queue: acquire rcu_read_lock() in instance_destroy_rcu()

Eric Garver (1):
      netfilter: nft_fib: allow from forward/input without iif selector

Florian Westphal (1):
      netfilter: tproxy: bail out if IP has been disabled on the device

Pablo Neira Ayuso (2):
      netfilter: nft_payload: restore vlan q-in-q match support
      netfilter: nft_payload: skbuff vlan metadata mangle support

 net/ipv4/netfilter/nf_tproxy_ipv4.c   |  2 +
 net/netfilter/ipset/ip_set_list_set.c |  3 ++
 net/netfilter/nfnetlink_queue.c       |  2 +
 net/netfilter/nft_fib.c               |  8 ++-
 net/netfilter/nft_payload.c           | 95 ++++++++++++++++++++++++++---------
 5 files changed, 82 insertions(+), 28 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

Patch #1 unlike early commit path stage which triggers a call to abort,
         an explicit release of the batch is required on abort, otherwise
         mutex is released and commit_list remains in place.

Patch #2 release mutex after nft_gc_seq_end() in commit path, otherwise
         async GC worker could collect expired objects.

Patch #3 flush pending destroy work in module removal path, otherwise UaF
         is possible.

Patch #4 and #6 restrict the table dormant flag with basechain updates
	 to fix state inconsistency in the hook registration.

Patch #5 adds missing RCU read side lock to flowtable type to avoid races
	 with module removal.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-24-04-04

Thanks.

----------------------------------------------------------------

The following changes since commit 72076fc9fe60b9143cd971fd8737718719bc512e:

  Revert "tg3: Remove residual error handling in tg3_suspend" (2024-04-04 10:51:01 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-04-04

for you to fetch changes up to 1bc83a019bbe268be3526406245ec28c2458a518:

  netfilter: nf_tables: discard table flag update with pending basechain deletion (2024-04-04 11:38:35 +0200)

----------------------------------------------------------------
netfilter pull request 24-04-04

----------------------------------------------------------------
Pablo Neira Ayuso (5):
      netfilter: nf_tables: release batch on table validation from abort path
      netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path
      netfilter: nf_tables: flush pending destroy work before exit_net release
      netfilter: nf_tables: reject new basechain after table flag update
      netfilter: nf_tables: discard table flag update with pending basechain deletion

Ziyang Xuan (1):
      netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get()

 net/netfilter/nf_tables_api.c | 50 +++++++++++++++++++++++++++++--------------
 1 file changed, 34 insertions(+), 16 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) TCP conntrack now only evaluates window negotiation for packets in
   the REPLY direction, from Ryan Schaefer. Otherwise SYN retransmissions
   trigger incorrect window scale negotiation. From Ryan Schaefer.

2) Restrict tunnel objects to NFPROTO_NETDEV which is where it makes sense
   to use this object type.

3) Fix conntrack pick up from the middle of SCTP_CID_SHUTDOWN_ACK packets.
   From Xin Long.

4) Another attempt from Jozsef Kadlecsik to address the slow down of the
   swap command in ipset.

5) Replace a BUG_ON by WARN_ON_ONCE in nf_log, and consolidate check for
   the case that the logger is NULL from the read side lock section.

6) Address lack of sanitization for custom expectations. Restrict layer 3
   and 4 families to what it is supported by userspace.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-24-01-31

Thanks.

----------------------------------------------------------------

The following changes since commit a2933a8759a62269754e54733d993b19de870e84:

  selftests: bonding: do not test arp/ns target with mode balance-alb/tlb (2024-01-25 09:50:54 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-01-31

for you to fetch changes up to 8059918a1377f2f1fff06af4f5a4ed3d5acd6bc4:

  netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations (2024-01-31 23:14:14 +0100)

----------------------------------------------------------------
netfilter pull request 24-01-31

----------------------------------------------------------------
Jozsef Kadlecsik (1):
      netfilter: ipset: fix performance regression in swap operation

Pablo Neira Ayuso (3):
      netfilter: nf_tables: restrict tunnel object to NFPROTO_NETDEV
      netfilter: nf_log: replace BUG_ON by WARN_ON_ONCE when putting logger
      netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations

Ryan Schaefer (1):
      netfilter: conntrack: correct window scaling with retransmitted SYN

Xin Long (1):
      netfilter: conntrack: check SCTP_CID_SHUTDOWN_ACK for vtag setting in sctp_new

 include/linux/netfilter/ipset/ip_set.h  |  4 ++++
 include/net/netfilter/nf_tables.h       |  2 ++
 net/netfilter/ipset/ip_set_bitmap_gen.h | 14 ++++++++++---
 net/netfilter/ipset/ip_set_core.c       | 37 +++++++++++++++++++++++++--------
 net/netfilter/ipset/ip_set_hash_gen.h   | 15 ++++++++++---
 net/netfilter/ipset/ip_set_list_set.c   | 13 +++++++++---
 net/netfilter/nf_conntrack_proto_sctp.c |  2 +-
 net/netfilter/nf_conntrack_proto_tcp.c  | 10 +++++----
 net/netfilter/nf_log.c                  |  7 ++++---
 net/netfilter/nf_tables_api.c           | 14 ++++++++-----
 net/netfilter/nft_ct.c                  | 24 +++++++++++++++++++++
 net/netfilter/nft_tunnel.c              |  1 +
 12 files changed, 112 insertions(+), 31 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Update nf_tables kdoc to keep it in sync with the code, from George Guo.

2) Handle NETDEV_UNREGISTER event for inet/ingress basechain.

3) Reject configuration that cause nft_limit to overflow, from Florian Westphal.

4) Restrict anonymous set/map names to 16 bytes, from Florian Westphal.

5) Disallow to encode queue number and error in verdicts. This reverts
   a patch which seems to have introduced an early attempt to support for
   nfqueue maps, which is these days supported via nft_queue expression.

6) Sanitize family via .validate for expressions that explicitly refer
   to NF_INET_* hooks.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-24-01-24

Thanks.

----------------------------------------------------------------

The following changes since commit 32f2a0afa95fae0d1ceec2ff06e0e816939964b8:

  net/sched: flower: Fix chain template offload (2024-01-24 01:33:59 +0000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-24-01-24

for you to fetch changes up to d0009effa8862c20a13af4cb7475d9771b905693:

  netfilter: nf_tables: validate NFPROTO_* family (2024-01-24 20:02:40 +0100)

----------------------------------------------------------------
netfilter pull request 24-01-24

----------------------------------------------------------------
Florian Westphal (3):
      netfilter: nft_limit: reject configurations that cause integer overflow
      netfilter: nf_tables: restrict anonymous set and map names to 16 bytes
      netfilter: nf_tables: reject QUEUE/DROP verdict parameters

George Guo (1):
      netfilter: nf_tables: cleanup documentation

Pablo Neira Ayuso (2):
      netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain
      netfilter: nf_tables: validate NFPROTO_* family

 include/net/netfilter/nf_tables.h | 49 +++++++++++++++++++++++++++++++--------
 net/netfilter/nf_tables_api.c     | 20 ++++++++--------
 net/netfilter/nft_chain_filter.c  | 11 +++++++--
 net/netfilter/nft_compat.c        | 12 ++++++++++
 net/netfilter/nft_flow_offload.c  |  5 ++++
 net/netfilter/nft_limit.c         | 23 ++++++++++++------
 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 ++++
 12 files changed, 121 insertions(+), 31 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Incorrect nf_defrag registration for bpf link infra, from D. Wythe.

2) Skip inactive elements in pipapo set backend walk to avoid double
   deactivation, from Florian Westphal.

3) Fix NFT_*_F_PRESENT check with big endian arch, also from Florian.

4) Bail out if number of expressions in NFTA_DYNSET_EXPRESSIONS mismatch
   stateful expressions in set declaration.

5) Honor family in table lookup by handle. Broken since 4.16.

6) Use sk_callback_lock to protect access to sk->sk_socket in xt_owner.
   sock_orphan() might zap this pointer, from Phil Sutter.

All of these fixes address broken stuff for several releases.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-23-12-06

Thanks.

----------------------------------------------------------------

The following changes since commit 54d4434da824460a190d547404530eff12a7907d:

  Merge branch 'hv_netvsc-fix-race-of-netvsc-vf-register-and-slave-bit' (2023-11-21 13:15:05 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-23-12-06

for you to fetch changes up to 7ae836a3d630e146b732fe8ef7d86b243748751f:

  netfilter: xt_owner: Fix for unsafe access of sk->sk_socket (2023-12-06 17:52:15 +0100)

----------------------------------------------------------------
netfilter pull request 23-12-06

----------------------------------------------------------------
D. Wythe (1):
      netfilter: bpf: fix bad registration on nf_defrag

Florian Westphal (2):
      netfilter: nft_set_pipapo: skip inactive elements during set walk
      netfilter: nf_tables: fix 'exist' matching on bigendian arches

Pablo Neira Ayuso (2):
      netfilter: nf_tables: bail out on mismatching dynset and set expressions
      netfilter: nf_tables: validate family when identifying table via handle

Phil Sutter (1):
      netfilter: xt_owner: Fix for unsafe access of sk->sk_socket

 net/netfilter/nf_bpf_link.c    | 10 +++++-----
 net/netfilter/nf_tables_api.c  |  5 +++--
 net/netfilter/nft_dynset.c     | 13 +++++++++----
 net/netfilter/nft_exthdr.c     |  4 ++--
 net/netfilter/nft_fib.c        |  8 ++++++--
 net/netfilter/nft_set_pipapo.c |  3 +++
 net/netfilter/xt_owner.c       | 16 ++++++++++++----
 7 files changed, 40 insertions(+), 19 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Fix missing overflow use refcount checks in nf_tables.

2) Do not set IPS_ASSURED for IPS_NAT_CLASH entries in GRE tracker,
   from Florian Westphal.

3) Bail out if nf_ct_helper_hash is NULL before registering helper,
   from Florent Revest.

4) Use siphash() instead siphash_4u64() to fix performance regression,
   also from Florian.

5) Do not allow to add rules to removed chains via ID,
   from Thadeu Lima de Souza Cascardo.

6) Fix oob read access in byteorder expression, also from Thadeu.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-23-07-06

Thanks.

----------------------------------------------------------------

The following changes since commit c451410ca7e3d8eeb31d141fc20c200e21754ba4:

  Merge branch 'mptcp-fixes' (2023-07-05 10:51:14 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-23-07-06

for you to fetch changes up to caf3ef7468f7534771b5c44cd8dbd6f7f87c2cbd:

  netfilter: nf_tables: prevent OOB access in nft_byteorder_eval (2023-07-06 00:53:14 +0200)

----------------------------------------------------------------
netfilter pull request 23-07-06

----------------------------------------------------------------
Florent Revest (1):
      netfilter: conntrack: Avoid nf_ct_helper_hash uses after free

Florian Westphal (2):
      netfilter: conntrack: gre: don't set assured flag for clash entries
      netfilter: conntrack: don't fold port numbers into addresses before hashing

Pablo Neira Ayuso (1):
      netfilter: nf_tables: report use refcount overflow

Thadeu Lima de Souza Cascardo (2):
      netfilter: nf_tables: do not ignore genmask when looking up chain by id
      netfilter: nf_tables: prevent OOB access in nft_byteorder_eval

 include/net/netfilter/nf_conntrack_tuple.h |   3 +
 include/net/netfilter/nf_tables.h          |  31 ++++-
 net/netfilter/nf_conntrack_core.c          |  20 ++--
 net/netfilter/nf_conntrack_helper.c        |   4 +
 net/netfilter/nf_conntrack_proto_gre.c     |  10 +-
 net/netfilter/nf_tables_api.c              | 174 ++++++++++++++++++-----------
 net/netfilter/nft_byteorder.c              |  14 +--
 net/netfilter/nft_flow_offload.c           |   6 +-
 net/netfilter/nft_immediate.c              |   8 +-
 net/netfilter/nft_objref.c                 |   8 +-
 10 files changed, 178 insertions(+), 100 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Reset shift on Boyer-Moore string match for each block,
   from Jeremy Sowden.

2) Fix acccess to non-linear area in DCCP conntrack helper,
   from Florian Westphal.

3) Fix kernel-doc warnings, by Randy Dunlap.

4) Bail out if expires= does not show in SIP helper message,
   or make ct_sip_parse_numerical_param() tristate and report
   error if expires= cannot be parsed.

5) Unbind non-anonymous set in case rule construction fails.

6) Fix underflow in chain reference counter in case set element
   already exists or it cannot be created.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-23-06-27

Thanks.

----------------------------------------------------------------

The following changes since commit 6709d4b7bc2e079241fdef15d1160581c5261c10:

  net: nfc: Fix use-after-free caused by nfc_llcp_find_local (2023-06-26 10:57:23 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-23-06-27

for you to fetch changes up to b389139f12f287b8ed2e2628b72df89a081f0b59:

  netfilter: nf_tables: fix underflow in chain reference counter (2023-06-26 17:18:55 +0200)

----------------------------------------------------------------
netfilter pull request 23-06-27

----------------------------------------------------------------
Florian Westphal (1):
      netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one

Ilia.Gavrilov (1):
      netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value.

Jeremy Sowden (1):
      lib/ts_bm: reset initial match offset for every block of text

Pablo Neira Ayuso (2):
      netfilter: nf_tables: unbind non-anonymous set if rule construction fails
      netfilter: nf_tables: fix underflow in chain reference counter

Randy Dunlap (1):
      linux/netfilter.h: fix kernel-doc warnings

 include/linux/netfilter.h               |  4 +--
 lib/ts_bm.c                             |  4 ++-
 net/netfilter/nf_conntrack_proto_dccp.c | 52 +++++++++++++++++++++++++++++++--
 net/netfilter/nf_conntrack_sip.c        |  2 +-
 net/netfilter/nf_tables_api.c           |  6 +++-
 5 files changed, 60 insertions(+), 8 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Add selftest for nft_synproxy, from Florian Westphal.

2) xt_socket destroy path incorrectly disables IPv4 defrag for
   IPv6 traffic (typo), from Eric Dumazet.

3) Fix exit value selftest nft_concat_range.sh, from Hangbin Liu.

4) nft_synproxy disables the IPv4 hooks if the IPv6 hooks fail
   to be registered.

5) disable rp_filter on router in selftest nft_fib.sh, also
   from Hangbin Liu.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git

Thanks.

----------------------------------------------------------------

The following changes since commit 7db788ad627aabff2b74d4f1a3b68516d0fee0d7:

  nfp: flower: fix ida_idx not being released (2022-02-08 21:06:35 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git HEAD

for you to fetch changes up to bbe4c0896d25009a7c86285d2ab024eed4374eea:

  selftests: netfilter: disable rp_filter on router (2022-02-11 00:01:04 +0100)

----------------------------------------------------------------
Eric Dumazet (1):
      netfilter: xt_socket: fix a typo in socket_mt_destroy()

Florian Westphal (1):
      selftests: netfilter: add synproxy test

Hangbin Liu (2):
      selftests: netfilter: fix exit value for nft_concat_range
      selftests: netfilter: disable rp_filter on router

Pablo Neira Ayuso (2):
      netfilter: nft_synproxy: unregister hooks on init error path
      selftests: netfilter: synproxy test requires nf_conntrack

 net/netfilter/nft_synproxy.c                       |   4 +-
 net/netfilter/xt_socket.c                          |   2 +-
 tools/testing/selftests/netfilter/Makefile         |   2 +-
 .../selftests/netfilter/nft_concat_range.sh        |   2 +-
 tools/testing/selftests/netfilter/nft_fib.sh       |   1 +
 tools/testing/selftests/netfilter/nft_synproxy.sh  | 117 +++++++++++++++++++++
 6 files changed, 124 insertions(+), 4 deletions(-)
 create mode 100755 tools/testing/selftests/netfilter/nft_synproxy.sh

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Don't refresh timeout for SCTP flows in CLOSED state.

2) Don't allow access to transport header if fragment offset is set on.

3) Reinitialize internal conntrack state for retransmitted TCP
   syn-ack packet.

4) Update MAINTAINER file to add the Netfilter group tree. Moving
   forward, Florian Westphal has access to this tree so he can also
   send pull requests.

5) Set on IPS_HELPER for entries created via ctnetlink, otherwise NAT
   might zap it.

All patches from Florian Westphal.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git

Thanks.

----------------------------------------------------------------

The following changes since commit ed14fc7a79ab43e9f2cb1fa9c1733fdc133bba30:

  net: sparx5: Fix get_stat64 crash in tcpdump (2022-02-03 19:01:15 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git HEAD

for you to fetch changes up to d1ca60efc53d665cf89ed847a14a510a81770b81:

  netfilter: ctnetlink: disable helper autoassign (2022-02-04 05:39:57 +0100)

----------------------------------------------------------------
Florian Westphal (6):
      netfilter: conntrack: don't refresh sctp entries in closed state
      netfilter: nft_payload: don't allow th access for fragments
      netfilter: conntrack: move synack init code to helper
      netfilter: conntrack: re-init state for retransmitted syn-ack
      MAINTAINERS: netfilter: update git links
      netfilter: ctnetlink: disable helper autoassign

 MAINTAINERS                                        |  4 +-
 include/uapi/linux/netfilter/nf_conntrack_common.h |  2 +-
 net/netfilter/nf_conntrack_netlink.c               |  3 +-
 net/netfilter/nf_conntrack_proto_sctp.c            |  9 ++++
 net/netfilter/nf_conntrack_proto_tcp.c             | 59 +++++++++++++++-------
 net/netfilter/nft_exthdr.c                         |  2 +-
 net/netfilter/nft_payload.c                        |  9 ++--
 7 files changed, 61 insertions(+), 27 deletions(-)

[PATCH net 0/6] Netfilter fixes for net

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter fixes for net:

1) Memleak in commit audit error path, from Dongliang Mu.

2) Avoid possible false sharing for flowtable timeout updates
   and nft_last use.

3) Adjust conntrack timestamp due to garbage collection delay,
   from Florian Westphal.

4) Fix nft_nat without layer 3 address for the inet family.

5) Fix compilation warning in nfnl_hook when ingress support
   is disabled, from Arnd Bergmann.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git

Thanks.

----------------------------------------------------------------

The following changes since commit 5f119ba1d5771bbf46d57cff7417dcd84d3084ba:

  net: decnet: Fix sleeping inside in af_decnet (2021-07-16 14:06:16 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git HEAD

for you to fetch changes up to 217e26bd87b2930856726b48a4e71c768b8c9bf5:

  netfilter: nfnl_hook: fix unused variable warning (2021-07-23 14:45:03 +0200)

----------------------------------------------------------------
Arnd Bergmann (1):
      netfilter: nfnl_hook: fix unused variable warning

Dongliang Mu (1):
      netfilter: nf_tables: fix audit memory leak in nf_tables_commit

Florian Westphal (1):
      netfilter: conntrack: adjust stop timestamp to real expiry value

Pablo Neira Ayuso (3):
      netfilter: flowtable: avoid possible false sharing
      netfilter: nft_last: avoid possible false sharing
      netfilter: nft_nat: allow to specify layer 4 protocol NAT only

 net/netfilter/nf_conntrack_core.c  |  7 ++++++-
 net/netfilter/nf_flow_table_core.c |  6 +++++-
 net/netfilter/nf_tables_api.c      | 12 ++++++++++++
 net/netfilter/nfnetlink_hook.c     |  2 ++
 net/netfilter/nft_last.c           | 20 +++++++++++++-------
 net/netfilter/nft_nat.c            |  4 +++-
 6 files changed, 41 insertions(+), 10 deletions(-)