Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 8549f26e2495..381dd6a6aebb 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2128,7 +2128,7 @@ int ip_route_input(struct sk_buff *skb, u32 daddr, u32 saddr,
                 struct in_device *in_dev;
 
                 rcu_read_lock();
-                if ((in_dev = __in_dev_get(dev)) != NULL) {
+                if ((in_dev = __in_dev_get_rcu(dev)) != NULL) {
                         int our = ip_check_mc(in_dev, daddr, saddr,
                                 skb->nh.iph->protocol);
                         if (our
@@ -2443,7 +2443,9 @@ static int ip_route_output_slow(struct rtable **rp, const struct flowi *oldflp)
                 err = -ENODEV;
                 if (dev_out == NULL)
                         goto out;
-                if (__in_dev_get(dev_out) == NULL) {
+
+                /* RACE: Check return value of inet_select_addr instead. */
+                if (__in_dev_get_rtnl(dev_out) == NULL) {
                         dev_put(dev_out);
                         goto out;       /* Wrong error code */
                 }