team: Fix double free in error path

commit cbcc607e18422555db569b593608aec26111cb0b upstream.

The __send_and_alloc_skb() receives a skb ptr as a parameter but in
case it fails the skb is not valid:
- Send failed and released the skb internally.
- Allocation failed.

The current code tries to release the skb in case of failure which
causes redundant freeing.

Fixes: 9b00cf2d1024 ("team: implement multipart netlink messages for options transfers")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index b78532e8c56ebd9f5100e96c991f869c898614b1..6b38cbafef09ed2fbd59362ec374114ec89dff26 100644 (file)
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2356,7 +2356,7 @@ send_done:
        if (!nlh) {
                err = __send_and_alloc_skb(&skb, team, portid, send_func);
                if (err)
-                       goto errout;
+                       return err;
                goto send_done;
        }
 
@@ -2636,7 +2636,7 @@ send_done:
        if (!nlh) {
                err = __send_and_alloc_skb(&skb, team, portid, send_func);
                if (err)
-                       goto errout;
+                       return err;
                goto send_done;
        }