netdev - [patch net-next v3 6/7] Documentation: devlink: add a note about RTNL lock into locking section

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20231013121029.353351-7-jiri@resnulli.us>
Date: Fri, 13 Oct 2023 14:10:28 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com
Subject: [patch net-next v3 6/7] Documentation: devlink: add a note about RTNL lock into locking section

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

Add a note describing the locking order of taking RTNL lock with devlink
instance lock.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
v2->v3:
- new patch
---
 Documentation/networking/devlink/index.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/networking/devlink/index.rst b/Documentation/networking/devlink/index.rst
index 52e52a1b603d..2884ad243b54 100644
--- a/Documentation/networking/devlink/index.rst
+++ b/Documentation/networking/devlink/index.rst
@@ -18,6 +18,10 @@ netlink commands.
 
 Drivers are encouraged to use the devlink instance lock for their own needs.
 
+Drivers need to be cautious when taking devlink instance lock and
+taking RTNL lock at the same time. Devlink instance lock needs to be taken
+first, only after that RTNL lock could be taken.
+
 Nested instances
 ----------------
 
-- 
2.41.0