From: Sabrina Dubroca Date: Fri, 29 Jul 2016 13:37:55 +0000 (+0200) Subject: macsec: fix negative refcnt on parent link X-Git-Tag: v4.8-rc1~51^2~26^2 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=0759e552bce7257db542e203a01a9ef8843c751e;p=linux.git macsec: fix negative refcnt on parent link When creation of a macsec device fails because an identical device already exists on this link, the current code decrements the refcnt on the parent link (in ->destructor for the macsec device), but it had not been incremented yet. Move the dev_hold(parent_link) call earlier during macsec device creation. Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver") Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller --- diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 7f5c5e0f9cf9..d13e6e15d7b5 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -3179,6 +3179,8 @@ static int macsec_newlink(struct net *net, struct net_device *dev, if (err < 0) return err; + dev_hold(real_dev); + /* need to be already registered so that ->init has run and * the MAC addr is set */ @@ -3207,8 +3209,6 @@ static int macsec_newlink(struct net *net, struct net_device *dev, macsec_generation++; - dev_hold(real_dev); - return 0; del_dev: