netdev - [patch net-next] net: devlink: add WARN_ON_ONCE to check return value of unregister_netdevice_notifier

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 25 Nov 2022 11:02:55 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, idosch@...sch.org
Subject: [patch net-next] net: devlink: add WARN_ON_ONCE to check return value of unregister_netdevice_notifier_net() call

From: Jiri Pirko <jiri@...dia.com>

As the return value is not 0 only in case there is no such notifier
block registered, add a WARN_ON_ONCE() to yell about it.

Suggested-by: Ido Schimmel <idosch@...sch.org>
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 net/core/devlink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index cea154ddce7a..0e10a8a68c5e 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9907,8 +9907,8 @@ void devlink_free(struct devlink *devlink)
 
 	xa_destroy(&devlink->snapshot_ids);
 
-	unregister_netdevice_notifier_net(devlink_net(devlink),
-					  &devlink->netdevice_nb);
+	WARN_ON_ONCE(unregister_netdevice_notifier_net(devlink_net(devlink),
+						       &devlink->netdevice_nb));
 
 	xa_erase(&devlinks, devlink->index);
 
-- 
2.37.3