4 files changed, 30 insertions, 20 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 25b4b5d23485..ee0608bb3bc0 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2166,28 +2166,28 @@ replay:
                         }
                 }
                 err = rtnl_configure_link(dev, ifm);
-                if (err < 0) {
-                        if (ops->newlink) {
-                                LIST_HEAD(list_kill);
-
-                                ops->dellink(dev, &list_kill);
-                                unregister_netdevice_many(&list_kill);
-                        } else {
-                                unregister_netdevice(dev);
-                        }
-                        goto out;
-                }
-
+                if (err < 0)
+                        goto out_unregister;
                 if (link_net) {
                         err = dev_change_net_namespace(dev, dest_net, ifname);
                         if (err < 0)
-                                unregister_netdevice(dev);
+                                goto out_unregister;
                 }
 out:
                 if (link_net)
                         put_net(link_net);
                 put_net(dest_net);
                 return err;
+out_unregister:
+                if (ops->newlink) {
+                        LIST_HEAD(list_kill);
+
+                        ops->dellink(dev, &list_kill);
+                        unregister_netdevice_many(&list_kill);
+                } else {
+                        unregister_netdevice(dev);
+                }
+                goto out;
         }
 }
 
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f80507823531..8e4ac97c8477 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3733,9 +3733,13 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
                      struct sock *sk, int tstype)
 {
         struct sk_buff *skb;
-        bool tsonly = sk->sk_tsflags & SOF_TIMESTAMPING_OPT_TSONLY;
+        bool tsonly;
 
-        if (!sk || !skb_may_tx_timestamp(sk, tsonly))
+        if (!sk)
+                return;
+
+        tsonly = sk->sk_tsflags & SOF_TIMESTAMPING_OPT_TSONLY;
+        if (!skb_may_tx_timestamp(sk, tsonly))
                 return;
 
         if (tsonly)
@@ -4173,7 +4177,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet)
         skb->ignore_df = 0;
         skb_dst_drop(skb);
         skb->mark = 0;
-        skb->sender_cpu = 0;
+        skb_sender_cpu_clear(skb);
         skb_init_secmark(skb);
         secpath_reset(skb);
         nf_reset(skb);
diff --git a/net/core/sock.c b/net/core/sock.c
index 93c8b20c91e4..78e89eb7eb70 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1655,6 +1655,10 @@ void sock_rfree(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(sock_rfree);
 
+/*
+ * Buffer destructor for skbs that are not used directly in read or write
+ * path, e.g. for error handler skbs. Automatically called from kfree_skb.
+ */
 void sock_efree(struct sk_buff *skb)
 {
         sock_put(skb->sk);
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 433424804284..8ce351ffceb1 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -25,6 +25,8 @@
 static int zero = 0;
 static int one = 1;
 static int ushort_max = USHRT_MAX;
+static int min_sndbuf = SOCK_MIN_SNDBUF;
+static int min_rcvbuf = SOCK_MIN_RCVBUF;
 
 static int net_msg_warn;        /* Unused, but still a sysctl */
 
@@ -237,7 +239,7 @@ static struct ctl_table net_core_table[] = {
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec_minmax,
-                .extra1         = &one,
+                .extra1         = &min_sndbuf,
         },
         {
                 .procname       = "rmem_max",
@@ -245,7 +247,7 @@ static struct ctl_table net_core_table[] = {
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec_minmax,
-                .extra1         = &one,
+                .extra1         = &min_rcvbuf,
         },
         {
                 .procname       = "wmem_default",
@@ -253,7 +255,7 @@ static struct ctl_table net_core_table[] = {
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec_minmax,
-                .extra1         = &one,
+                .extra1         = &min_sndbuf,
         },
         {
                 .procname       = "rmem_default",
@@ -261,7 +263,7 @@ static struct ctl_table net_core_table[] = {
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = proc_dointvec_minmax,
-                .extra1         = &one,
+                .extra1         = &min_rcvbuf,
         },
         {
                 .procname       = "dev_weight",