[PATCH review for 4.4 33/47] team: fix memory leaks

[Levin, Alexander (Sasha Levin)]

From: Pan Bian <bianpan2...@163.com>

[ Upstream commit 72ec0bc64b9a5d8e0efcb717abfc757746b101b7 ]

In functions team_nl_send_port_list_get() and
team_nl_send_options_get(), pointer skb keeps the return value of
nlmsg_new(). When the call to genlmsg_put() fails, the memory is not
freed(). This will result in memory leak bugs.

Fixes: 9b00cf2d1024 ("team: implement multipart netlink messages for options 
transfers")
Signed-off-by: Pan Bian <bianpan2...@163.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 drivers/net/team/team.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index a5f392ae30d5..61cd53838360 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2343,8 +2343,10 @@ start_again:
 
        hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | 
NLM_F_MULTI,
                          TEAM_CMD_OPTIONS_GET);
-       if (!hdr)
+       if (!hdr) {
+               nlmsg_free(skb);
                return -EMSGSIZE;
+       }
 
        if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
                goto nla_put_failure;
@@ -2611,8 +2613,10 @@ start_again:
 
        hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | 
NLM_F_MULTI,
                          TEAM_CMD_PORT_LIST_GET);
-       if (!hdr)
+       if (!hdr) {
+               nlmsg_free(skb);
                return -EMSGSIZE;
+       }
 
        if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
                goto nla_put_failure;
-- 
2.11.0