From: Eric Dumazet <edumazet@google.com>
Date: Sun, 5 Dec 2021 04:22:04 +0000 (-0800)
Subject: ipv6: add net device refcount tracker to rt6_probe_deferred()
X-Git-Tag: howlett/maple/20220722_2~1498^2~259^2~13
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=fb67510ba9bd3ed1f8a2db4946e847ca0418f8dc;p=users%2Fjedix%2Flinux-maple.git

ipv6: add net device refcount tracker to rt6_probe_deferred()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index ba4dc94d76d6..8d834f901b48 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -593,6 +593,7 @@ struct __rt6_probe_work {
 	struct work_struct work;
 	struct in6_addr target;
 	struct net_device *dev;
+	netdevice_tracker dev_tracker;
 };
 
 static void rt6_probe_deferred(struct work_struct *w)
@@ -603,7 +604,7 @@ static void rt6_probe_deferred(struct work_struct *w)
 
 	addrconf_addr_solict_mult(&work->target, &mcaddr);
 	ndisc_send_ns(work->dev, &work->target, &mcaddr, NULL, 0);
-	dev_put(work->dev);
+	dev_put_track(work->dev, &work->dev_tracker);
 	kfree(work);
 }
 
@@ -657,7 +658,7 @@ static void rt6_probe(struct fib6_nh *fib6_nh)
 	} else {
 		INIT_WORK(&work->work, rt6_probe_deferred);
 		work->target = *nh_gw;
-		dev_hold(dev);
+		dev_hold_track(dev, &work->dev_tracker, GFP_KERNEL);
 		work->dev = dev;
 		schedule_work(&work->work);
 	}