From 5ae2195088d06adfd20eab98ecc9db80ef2eb6b2 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 4 Dec 2021 20:22:00 -0800 Subject: [PATCH] net: add net device refcount tracker to ethtool_phys_id() This helper might hold a netdev reference for a long time, lets add reference tracking. Signed-off-by: Eric Dumazet Signed-off-by: Jakub Kicinski --- net/ethtool/ioctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index fa8aa5e..9a113d8 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1989,6 +1989,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) struct ethtool_value id; static bool busy; const struct ethtool_ops *ops = dev->ethtool_ops; + netdevice_tracker dev_tracker; int rc; if (!ops->set_phys_id) @@ -2008,7 +2009,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) * removal of the device. */ busy = true; - dev_hold(dev); + dev_hold_track(dev, &dev_tracker, GFP_KERNEL); rtnl_unlock(); if (rc == 0) { @@ -2032,7 +2033,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) } rtnl_lock(); - dev_put(dev); + dev_put_track(dev, &dev_tracker); busy = false; (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); -- 2.7.4