Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix regression in multi-SKB responses to RTM_GETADDR, from Arthur
    Gautier.

 2) Fix ipv6 frag parsing in openvswitch, from Yi-Hung Wei.

 3) Unbounded recursion in ipv4 and ipv6 GUE tunnels, from Stefano
    Brivio.

 4) Use after free in hns driver, from Yonglong Liu.

 5) icmp6_send() needs to handle the case of NULL skb, from Eric
    Dumazet.

 6) Missing rcu read lock in __inet6_bind() when operating on mapped
    addresses, from David Ahern.

 7) Memory leak in tipc-nl_compat_publ_dump(), from Gustavo A. R. Silva.

 8) Fix PHY vs r8169 module loading ordering issues, from Heiner
    Kallweit.

 9) Fix bridge vlan memory leak, from Ido Schimmel.

10) Dev refcount leak in AF_PACKET, from Jason Gunthorpe.

11) Infoleak in ipv6_local_error(), flow label isn't completely
    initialized. From Eric Dumazet.

12) Handle mv88e6390 errata, from Andrew Lunn.

13) Making vhost/vsock CID hashing consistent, from Zha Bin.

14) Fix lack of UMH cleanup when it unexpectedly exits, from Taehee Yoo.

15) Bridge forwarding must clear skb->tstamp, from Paolo Abeni.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
  bnxt_en: Fix context memory allocation.
  bnxt_en: Fix ring checking logic on 57500 chips.
  mISDN: hfcsusb: Use struct_size() in kzalloc()
  net: clear skb->tstamp in bridge forwarding path
  net: bpfilter: disallow to remove bpfilter module while being used
  net: bpfilter: restart bpfilter_umh when error occurred
  net: bpfilter: use cleanup callback to release umh_info
  umh: add exit routine for UMH process
  isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
  vhost/vsock: fix vhost vsock cid hashing inconsistent
  net: stmmac: Prevent RX starvation in stmmac_napi_poll()
  net: stmmac: Fix the logic of checking if RX Watchdog must be enabled
  net: stmmac: Check if CBS is supported before configuring
  net: stmmac: dwxgmac2: Only clear interrupts that are active
  net: stmmac: Fix PCI module removal leak
  tools/bpf: fix bpftool map dump with bitfields
  tools/bpf: test btf bitfield with >=256 struct member offset
  bpf: fix bpffs bitfield pretty print
  net: ethernet: mediatek: fix warning in phy_start_aneg
  tcp: change txhash on SYN-data timeout
  ...

5 files changed, 57 insertions, 20 deletions

diff --git a/net/ipv4/bpfilter/sockopt.c b/net/ipv4/bpfilter/sockopt.c
index 5e04ed25bc0e..1e976bb93d99 100644
--- a/net/ipv4/bpfilter/sockopt.c
+++ b/net/ipv4/bpfilter/sockopt.c
@@ -1,28 +1,54 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/init.h>
+#include <linux/module.h>
 #include <linux/uaccess.h>
 #include <linux/bpfilter.h>
 #include <uapi/linux/bpf.h>
 #include <linux/wait.h>
 #include <linux/kmod.h>
+#include <linux/fs.h>
+#include <linux/file.h>
 
-int (*bpfilter_process_sockopt)(struct sock *sk, int optname,
-				char __user *optval,
-				unsigned int optlen, bool is_set);
-EXPORT_SYMBOL_GPL(bpfilter_process_sockopt);
+struct bpfilter_umh_ops bpfilter_ops;
+EXPORT_SYMBOL_GPL(bpfilter_ops);
+
+static void bpfilter_umh_cleanup(struct umh_info *info)
+{
+	mutex_lock(&bpfilter_ops.lock);
+	bpfilter_ops.stop = true;
+	fput(info->pipe_to_umh);
+	fput(info->pipe_from_umh);
+	info->pid = 0;
+	mutex_unlock(&bpfilter_ops.lock);
+}
 
 static int bpfilter_mbox_request(struct sock *sk, int optname,
 				 char __user *optval,
 				 unsigned int optlen, bool is_set)
 {
-	if (!bpfilter_process_sockopt) {
-		int err = request_module("bpfilter");
+	int err;
+	mutex_lock(&bpfilter_ops.lock);
+	if (!bpfilter_ops.sockopt) {
+		mutex_unlock(&bpfilter_ops.lock);
+		err = request_module("bpfilter");
+		mutex_lock(&bpfilter_ops.lock);
 
 		if (err)
-			return err;
-		if (!bpfilter_process_sockopt)
-			return -ECHILD;
+			goto out;
+		if (!bpfilter_ops.sockopt) {
+			err = -ECHILD;
+			goto out;
+		}
+	}
+	if (bpfilter_ops.stop) {
+		err = bpfilter_ops.start();
+		if (err)
+			goto out;
 	}
-	return bpfilter_process_sockopt(sk, optname, optval, optlen, is_set);
+	err = bpfilter_ops.sockopt(sk, optname, optval, optlen, is_set);
+out:
+	mutex_unlock(&bpfilter_ops.lock);
+	return err;
 }
 
 int bpfilter_ip_set_sockopt(struct sock *sk, int optname, char __user *optval,
@@ -41,3 +67,15 @@ int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval,
 
 	return bpfilter_mbox_request(sk, optname, optval, len, false);
 }
+
+static int __init bpfilter_sockopt_init(void)
+{
+	mutex_init(&bpfilter_ops.lock);
+	bpfilter_ops.stop = true;
+	bpfilter_ops.info.cmdline = "bpfilter_umh";
+	bpfilter_ops.info.cleanup = &bpfilter_umh_cleanup;
+
+	return 0;
+}
+
+module_init(bpfilter_sockopt_init);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 04ba321ae5ce..e258a00b4a3d 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1826,7 +1826,7 @@ put_tgt_net:
 	if (fillargs.netnsid >= 0)
 		put_net(tgt_net);
 
-	return err < 0 ? err : skb->len;
+	return skb->len ? : err;
 }
 
 static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh,
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 0c9f171fb085..632863541082 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -1065,7 +1065,8 @@ static int gue_err(struct sk_buff *skb, u32 info)
 	 * recursion. Besides, this kind of encapsulation can't even be
 	 * configured currently. Discard this.
 	 */
-	if (guehdr->proto_ctype == IPPROTO_UDP)
+	if (guehdr->proto_ctype == IPPROTO_UDP ||
+	    guehdr->proto_ctype == IPPROTO_UDPLITE)
 		return -EOPNOTSUPP;
 
 	skb_set_transport_header(skb, -(int)sizeof(struct icmphdr));
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index fffcc130900e..82f341e84fae 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -148,19 +148,17 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
 
 static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
 {
+	__be16 _ports[2], *ports;
 	struct sockaddr_in sin;
-	__be16 *ports;
-	int end;
-
-	end = skb_transport_offset(skb) + 4;
-	if (end > 0 && !pskb_may_pull(skb, end))
-		return;
 
 	/* All current transport protocols have the port numbers in the
 	 * first four bytes of the transport header and this function is
 	 * written with this assumption in mind.
 	 */
-	ports = (__be16 *)skb_transport_header(skb);
+	ports = skb_header_pointer(skb, skb_transport_offset(skb),
+				   sizeof(_ports), &_ports);
+	if (!ports)
+		return;
 
 	sin.sin_family = AF_INET;
 	sin.sin_addr.s_addr = ip_hdr(skb)->daddr;
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index f87dbc78b6bc..71a29e9c0620 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -226,7 +226,7 @@ static int tcp_write_timeout(struct sock *sk)
 	if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
 		if (icsk->icsk_retransmits) {
 			dst_negative_advice(sk);
-		} else if (!tp->syn_data && !tp->syn_fastopen) {
+		} else {
 			sk_rethink_txhash(sk);
 		}
 		retry_until = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_syn_retries;