Fix anycast procfs device leak

[IPV6]: /proc/net/anycast6 unbalanced inet6_dev refcnt

From: David Stevens <dlstevens@us.ibm.com>

Reading /proc/net/anycast6 when there is no anycast address
on an interface results in an ever-increasing inet6_dev reference
count, as well as a reference to the netdevice you can't get rid of.

From: David Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index a9604764e015adc03c77cdcea9f50d63c947235b..fe0c895d03a5099804d202b3e78a309ded8efc32 100644 (file)
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -462,6 +462,7 @@ static inline struct ifacaddr6 *ac6_get_first(struct seq_file *seq)
                        break;
                }
                read_unlock_bh(&idev->lock);
+               in6_dev_put(idev);
        }
        return im;
 }