Merge branch 'linus' into x86/urgent

Merge in the x86 changes to apply a fix.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

10 files changed, 75 insertions, 82 deletions

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 1511f64a6cea..faba0f61ad53 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -277,7 +277,7 @@ int batadv_max_header_len(void)
                            sizeof(struct batadv_coded_packet));
 #endif
 
-        return header_len;
+        return header_len + ETH_HLEN;
 }
 
 /**
diff --git a/net/core/filter.c b/net/core/filter.c
index 01b780856db2..ad30d626a5bd 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -36,7 +36,6 @@
 #include <asm/uaccess.h>
 #include <asm/unaligned.h>
 #include <linux/filter.h>
-#include <linux/reciprocal_div.h>
 #include <linux/ratelimit.h>
 #include <linux/seccomp.h>
 #include <linux/if_vlan.h>
@@ -166,7 +165,7 @@ unsigned int sk_run_filter(const struct sk_buff *skb,
                         A /= X;
                         continue;
                 case BPF_S_ALU_DIV_K:
-                        A = reciprocal_divide(A, K);
+                        A /= K;
                         continue;
                 case BPF_S_ALU_MOD_X:
                         if (X == 0)
@@ -553,11 +552,6 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
                 /* Some instructions need special checks */
                 switch (code) {
                 case BPF_S_ALU_DIV_K:
-                        /* check for division by zero */
-                        if (ftest->k == 0)
-                                return -EINVAL;
-                        ftest->k = reciprocal_value(ftest->k);
-                        break;
                 case BPF_S_ALU_MOD_K:
                         /* check for division by zero */
                         if (ftest->k == 0)
@@ -853,27 +847,7 @@ void sk_decode_filter(struct sock_filter *filt, struct sock_filter *to)
         to->code = decodes[code];
         to->jt = filt->jt;
         to->jf = filt->jf;
-
-        if (code == BPF_S_ALU_DIV_K) {
-                /*
-                 * When loaded this rule user gave us X, which was
-                 * translated into R = r(X). Now we calculate the
-                 * RR = r(R) and report it back. If next time this
-                 * value is loaded and RRR = r(RR) is calculated
-                 * then the R == RRR will be true.
-                 *
-                 * One exception. X == 1 translates into R == 0 and
-                 * we can't calculate RR out of it with r().
-                 */
-
-                if (filt->k == 0)
-                        to->k = 1;
-                else
-                        to->k = reciprocal_value(filt->k);
-
-                BUG_ON(reciprocal_value(to->k) != filt->k);
-        } else
-                to->k = filt->k;
+        to->k = filt->k;
 }
 
 int sk_get_filter(struct sock *sk, struct sock_filter __user *ubuf, unsigned int len)
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index d08c7a43dcd1..89b265aea151 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -221,8 +221,10 @@ int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
 
         if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) {
                 type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]);
-                if (type >= __IEEE802154_DEV_MAX)
-                        return -EINVAL;
+                if (type >= __IEEE802154_DEV_MAX) {
+                        rc = -EINVAL;
+                        goto nla_put_failure;
+                }
         }
 
         dev = phy->add_iface(phy, devname, type);
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index a0f52dac8940..e34dccbc4d70 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -930,12 +930,15 @@ skip_listen_ht:
                 spin_lock_bh(lock);
                 sk_nulls_for_each(sk, node, &head->chain) {
                         int res;
+                        int state;
 
                         if (!net_eq(sock_net(sk), net))
                                 continue;
                         if (num < s_num)
                                 goto next_normal;
-                        if (!(r->idiag_states & (1 << sk->sk_state)))
+                        state = (sk->sk_state == TCP_TIME_WAIT) ?
+                                inet_twsk(sk)->tw_substate : sk->sk_state;
+                        if (!(r->idiag_states & (1 << state)))
                                 goto next_normal;
                         if (r->sdiag_family != AF_UNSPEC &&
                             sk->sk_family != r->sdiag_family)
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 62212c772a4b..1672409f5ba5 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -157,9 +157,12 @@ static struct mr_table *ipmr_get_table(struct net *net, u32 id)
 static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4,
                            struct mr_table **mrt)
 {
-        struct ipmr_result res;
-        struct fib_lookup_arg arg = { .result = &res, };
         int err;
+        struct ipmr_result res;
+        struct fib_lookup_arg arg = {
+                .result = &res,
+                .flags = FIB_LOOKUP_NOREF,
+        };
 
         err = fib_rules_lookup(net->ipv4.mr_rules_ops,
                                flowi4_to_flowi(flp4), 0, &arg);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index c4638e6f0238..82de78603686 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1623,11 +1623,11 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                     (len > sysctl_tcp_dma_copybreak) && !(flags & MSG_PEEK) &&
                     !sysctl_tcp_low_latency &&
                     net_dma_find_channel()) {
-                        preempt_enable_no_resched();
+                        preempt_enable();
                         tp->ucopy.pinned_list =
                                         dma_pin_iovec_pages(msg->msg_iov, len);
                 } else {
-                        preempt_enable_no_resched();
+                        preempt_enable();
                 }
         }
 #endif
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 06493736fbc8..098b3a29f6f3 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -22,6 +22,9 @@
 
 int sysctl_tcp_nometrics_save __read_mostly;
 
+static struct tcp_metrics_block *__tcp_get_metrics(const struct inetpeer_addr *addr,
+                                                   struct net *net, unsigned int hash);
+
 struct tcp_fastopen_metrics {
         u16     mss;
         u16     syn_loss:10;            /* Recurring Fast Open SYN losses */
@@ -130,16 +133,41 @@ static void tcpm_suck_dst(struct tcp_metrics_block *tm, struct dst_entry *dst,
         }
 }
 
+#define TCP_METRICS_TIMEOUT             (60 * 60 * HZ)
+
+static void tcpm_check_stamp(struct tcp_metrics_block *tm, struct dst_entry *dst)
+{
+        if (tm && unlikely(time_after(jiffies, tm->tcpm_stamp + TCP_METRICS_TIMEOUT)))
+                tcpm_suck_dst(tm, dst, false);
+}
+
+#define TCP_METRICS_RECLAIM_DEPTH       5
+#define TCP_METRICS_RECLAIM_PTR         (struct tcp_metrics_block *) 0x1UL
+
 static struct tcp_metrics_block *tcpm_new(struct dst_entry *dst,
                                           struct inetpeer_addr *addr,
-                                          unsigned int hash,
-                                          bool reclaim)
+                                          unsigned int hash)
 {
         struct tcp_metrics_block *tm;
         struct net *net;
+        bool reclaim = false;
 
         spin_lock_bh(&tcp_metrics_lock);
         net = dev_net(dst->dev);
+
+        /* While waiting for the spin-lock the cache might have been populated
+         * with this entry and so we have to check again.
+         */
+        tm = __tcp_get_metrics(addr, net, hash);
+        if (tm == TCP_METRICS_RECLAIM_PTR) {
+                reclaim = true;
+                tm = NULL;
+        }
+        if (tm) {
+                tcpm_check_stamp(tm, dst);
+                goto out_unlock;
+        }
+
         if (unlikely(reclaim)) {
                 struct tcp_metrics_block *oldest;
 
@@ -169,17 +197,6 @@ out_unlock:
         return tm;
 }
 
-#define TCP_METRICS_TIMEOUT             (60 * 60 * HZ)
-
-static void tcpm_check_stamp(struct tcp_metrics_block *tm, struct dst_entry *dst)
-{
-        if (tm && unlikely(time_after(jiffies, tm->tcpm_stamp + TCP_METRICS_TIMEOUT)))
-                tcpm_suck_dst(tm, dst, false);
-}
-
-#define TCP_METRICS_RECLAIM_DEPTH       5
-#define TCP_METRICS_RECLAIM_PTR         (struct tcp_metrics_block *) 0x1UL
-
 static struct tcp_metrics_block *tcp_get_encode(struct tcp_metrics_block *tm, int depth)
 {
         if (tm)
@@ -282,7 +299,6 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
         struct inetpeer_addr addr;
         unsigned int hash;
         struct net *net;
-        bool reclaim;
 
         addr.family = sk->sk_family;
         switch (addr.family) {
@@ -304,13 +320,10 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
         hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
 
         tm = __tcp_get_metrics(&addr, net, hash);
-        reclaim = false;
-        if (tm == TCP_METRICS_RECLAIM_PTR) {
-                reclaim = true;
+        if (tm == TCP_METRICS_RECLAIM_PTR)
                 tm = NULL;
-        }
         if (!tm && create)
-                tm = tcpm_new(dst, &addr, hash, reclaim);
+                tm = tcpm_new(dst, &addr, hash);
         else
                 tcpm_check_stamp(tm, dst);
 
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index abe46a4228ce..4b6b720971b9 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3189,6 +3189,22 @@ out:
         in6_ifa_put(ifp);
 }
 
+/* ifp->idev must be at least read locked */
+static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp)
+{
+        struct inet6_ifaddr *ifpiter;
+        struct inet6_dev *idev = ifp->idev;
+
+        list_for_each_entry(ifpiter, &idev->addr_list, if_list) {
+                if (ifp != ifpiter && ifpiter->scope == IFA_LINK &&
+                    (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|
+                                       IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) ==
+                    IFA_F_PERMANENT)
+                        return false;
+        }
+        return true;
+}
+
 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
 {
         struct net_device *dev = ifp->idev->dev;
@@ -3208,14 +3224,11 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
          */
 
         read_lock_bh(&ifp->idev->lock);
-        spin_lock(&ifp->lock);
-        send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL &&
-                   ifp->idev->valid_ll_addr_cnt == 1;
+        send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp);
         send_rs = send_mld &&
                   ipv6_accept_ra(ifp->idev) &&
                   ifp->idev->cnf.rtr_solicits > 0 &&
                   (dev->flags&IFF_LOOPBACK) == 0;
-        spin_unlock(&ifp->lock);
         read_unlock_bh(&ifp->idev->lock);
 
         /* While dad is in progress mld report's source address is in6_addrany.
@@ -4512,19 +4525,6 @@ errout:
                 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
 }
 
-static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count)
-{
-        write_lock_bh(&ifp->idev->lock);
-        spin_lock(&ifp->lock);
-        if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|
-                            IFA_F_DADFAILED)) == IFA_F_PERMANENT) &&
-            (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL))
-                ifp->idev->valid_ll_addr_cnt += count;
-        WARN_ON(ifp->idev->valid_ll_addr_cnt < 0);
-        spin_unlock(&ifp->lock);
-        write_unlock_bh(&ifp->idev->lock);
-}
-
 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 {
         struct net *net = dev_net(ifp->idev->dev);
@@ -4533,8 +4533,6 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 
         switch (event) {
         case RTM_NEWADDR:
-                update_valid_ll_addr_cnt(ifp, 1);
-
                 /*
                  * If the address was optimistic
                  * we inserted the route at the start of
@@ -4550,8 +4548,6 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
                                               ifp->idev->dev, 0, 0);
                 break;
         case RTM_DELADDR:
-                update_valid_ll_addr_cnt(ifp, -1);
-
                 if (ifp->idev->cnf.forwarding)
                         addrconf_leave_anycast(ifp);
                 addrconf_leave_solict(ifp->idev, &ifp->addr);
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index f365310bfcca..0eb4038a4d63 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -141,9 +141,12 @@ static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
 static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
                             struct mr6_table **mrt)
 {
-        struct ip6mr_result res;
-        struct fib_lookup_arg arg = { .result = &res, };
         int err;
+        struct ip6mr_result res;
+        struct fib_lookup_arg arg = {
+                .result = &res,
+                .flags = FIB_LOOKUP_NOREF,
+        };
 
         err = fib_rules_lookup(net->ipv6.mr6_rules_ops,
                                flowi6_to_flowi(flp6), 0, &arg);
diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 8eb9501e3d60..b7ebe23cdedf 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -421,8 +421,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
                                  struct rds_ib_refill_cache *cache)
 {
         unsigned long flags;
-        struct list_head *old;
-        struct list_head __percpu *chpfirst;
+        struct list_head *old, *chpfirst;
 
         local_irq_save(flags);
 
@@ -432,7 +431,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
         else /* put on front */
                 list_add_tail(new_item, chpfirst);
 
-        __this_cpu_write(chpfirst, new_item);
+        __this_cpu_write(cache->percpu->first, new_item);
         __this_cpu_inc(cache->percpu->count);
 
         if (__this_cpu_read(cache->percpu->count) < RDS_IB_RECYCLE_BATCH_COUNT)
@@ -452,7 +451,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
         } while (old);
 
 
-        __this_cpu_write(chpfirst, NULL);
+        __this_cpu_write(cache->percpu->first, NULL);
         __this_cpu_write(cache->percpu->count, 0);
 end:
         local_irq_restore(flags);