netdev - [RFC PATCH] ipv4: release dev refcnt early when destroying inetdev

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-next>] [day] [month] [year] [list]

Message-ID: <4C8A3430.2070105@6wind.com>
Date:	Fri, 10 Sep 2010 15:35:44 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	netdev <netdev@...r.kernel.org>
Subject: [RFC PATCH] ipv4: release dev refcnt early when destroying inetdev

Hi all,

We got a scalability problem when we try to remove a lot of virtual interfaces. 
After analysis, we found that a refcnt on a device was released too late.
Here is a proposal patch. If we are not missing something, the refcnt can be 
release before call_rcu(). In IPv6, this is already the case.

Comments are welcome.

Regards,
Nicolas

View attachment "0001-ipv4-release-dev-refcnt-early-when-destroying-inetd.patch" of type "text/x-diff" (1831 bytes)