diff options
| author | Michal Kubecek <mkubecek@suse.cz> | 2020-03-28 00:01:03 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-29 22:32:36 -0700 |
| commit | b51fb7711a6d0e325d0fdb299cf67c4ec4b88b4b (patch) | |
| tree | bd9cd9d74a74ceafcc577577ca1178f2e7cac16e /net | |
| parent | 96376cad350873bdeb500d49817d749242f74068 (diff) | |
ethtool: fix reference leak in ethnl_set_privflags()
Andrew noticed that some handlers for *_SET commands leak a netdev
reference if required ethtool_ops callbacks do not exist. One of them is
ethnl_set_privflags(), a simple reproducer would be e.g.
ip link add veth1 type veth peer name veth2
ethtool --set-priv-flags veth1 foo on
ip link del veth1
Make sure dev_put() is called when ethtool_ops check fails.
Fixes: f265d799596a ("ethtool: set device private flags with PRIVFLAGS_SET request")
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ethtool/privflags.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c index e8f03b33db9b..77447dceb109 100644 --- a/net/ethtool/privflags.c +++ b/net/ethtool/privflags.c @@ -175,9 +175,10 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info) return ret; dev = req_info.dev; ops = dev->ethtool_ops; + ret = -EOPNOTSUPP; if (!ops->get_priv_flags || !ops->set_priv_flags || !ops->get_sset_count || !ops->get_strings) - return -EOPNOTSUPP; + goto out_dev; rtnl_lock(); ret = ethnl_ops_begin(dev); @@ -204,6 +205,7 @@ out_ops: ethnl_ops_complete(dev); out_rtnl: rtnl_unlock(); +out_dev: dev_put(dev); return ret; } |