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authorTaehee Yoo <ap420073@gmail.com>2020-03-05 00:02:54 +0000
committerDavid S. Miller <davem@davemloft.net>2020-03-05 11:59:47 -0800
commit56dc0a0eac999b77b1d37fe83a3c0409a6066319 (patch)
treef5d5eb1a59dab6890d0f247b99348e1fd577a877
parentd99045283ec1ff4d2f65336e2ba81b49970fd5ab (diff)
hsr: fix refcnt leak of hsr slave interface
In the commit e0a4b99773d3 ("hsr: use upper/lower device infrastructure"), dev_get() was removed but dev_put() in the error path wasn't removed. So, if creating hsr interface command is failed, the reference counter leak of lower interface would occur. Test commands: ip link add dummy0 type dummy ip link add ipvlan0 link dummy0 type ipvlan mode l2 ip link add ipvlan1 link dummy0 type ipvlan mode l2 ip link add hsr0 type hsr slave1 ipvlan0 slave2 ipvlan1 ip link del ipvlan0 Result: [ 633.271992][ T1280] unregister_netdevice: waiting for ipvlan0 to become free. Usage count = -1 Fixes: e0a4b99773d3 ("hsr: use upper/lower device infrastructure") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/hsr/hsr_slave.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c
index 123605cb5420..d3547e8c6d5b 100644
--- a/net/hsr/hsr_slave.c
+++ b/net/hsr/hsr_slave.c
@@ -108,7 +108,7 @@ static int hsr_portdev_setup(struct hsr_priv *hsr, struct net_device *dev,
res = dev_set_promiscuity(dev, 1);
if (res)
- goto fail_promiscuity;
+ return res;
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
hsr_dev = master->dev;
@@ -128,9 +128,6 @@ fail_rx_handler:
netdev_upper_dev_unlink(dev, hsr_dev);
fail_upper_dev_link:
dev_set_promiscuity(dev, -1);
-fail_promiscuity:
- dev_put(dev);
-
return res;
}