[NET]: Fix infinite loop in dev_mc_unsync().

From: Joe Perches <joe@perches.com>

Based upon an initial patch and report by Luis R. Rodriguez.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 7 deletions

diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index ae354057d84c..647973daca2b 100644
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c
@@ -168,13 +168,13 @@ void dev_mc_unsync(struct net_device *to, struct net_device *from)
         da = from->mc_list;
         while (da != NULL) {
                 next = da->next;
-                if (!da->da_synced)
-                        continue;
-                __dev_addr_delete(&to->mc_list, &to->mc_count,
-                                  da->da_addr, da->da_addrlen, 0);
-                da->da_synced = 0;
-                __dev_addr_delete(&from->mc_list, &from->mc_count,
-                                  da->da_addr, da->da_addrlen, 0);
+                if (da->da_synced) {
+                        __dev_addr_delete(&to->mc_list, &to->mc_count,
+                                          da->da_addr, da->da_addrlen, 0);
+                        da->da_synced = 0;
+                        __dev_addr_delete(&from->mc_list, &from->mc_count,
+                                          da->da_addr, da->da_addrlen, 0);
+                }
                 da = next;
         }
         __dev_set_rx_mode(to);