[PATCH -next] macvlan: Fix memleak in macvlan_changelink_sources

[Zheng Bin]

macvlan_changelink_sources
  if (addr)
    ret = macvlan_hash_add_source(vlan, addr)
  nla_for_each_attr(nla, head, len, rem)
    ret = macvlan_hash_add_source(vlan, addr)
    -->If fail, need to free previous malloc memory

Fixes: 79cf79abce71 ("macvlan: add source mode")
Signed-off-by: Zheng Bin <zhengbi...@huawei.com>
---
 drivers/net/macvlan.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 6a6cc9f75307..0017c5d28a27 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1379,8 +1379,10 @@ static int macvlan_changelink_sources(struct macvlan_dev 
*vlan, u32 mode,

                        addr = nla_data(nla);
                        ret = macvlan_hash_add_source(vlan, addr);
-                       if (ret)
+                       if (ret) {
+                               macvlan_flush_sources(vlan->port, vlan);
                                return ret;
+                       }
                }
        } else {
                return -EINVAL;
--
2.25.4