netdev - Re: 2.6.25rc7 lockdep trace

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]

Date:	Thu, 12 Jun 2008 09:20:34 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	David Miller <davem@...emloft.net>
Cc:	davej@...emonkey.org.uk, netdev@...r.kernel.org
Subject: Re: 2.6.25rc7 lockdep trace

Technically,

> If the RTNL is held when we invoke flush_scheduled_work() we could
> deadlock.  One such case is linkwatch, it is a workqueue which tries
                                            that ^^^^^^^^^

> The most common case are net driver ->stop() methods.  The
> simplest conversion is to instead use cancel_{delayed_}work_sync()
> explicitly on the various workqueues the driver uses.
                   and that ^^^^^^^^^^

> This is an OK transformation because these workqueues are doing things
                                    and that ^^^^^^^^^^

should read "work struct" because it all uses the global workqueue.

I haven't looked at the drivers in more detail (sorry) but the patch
itself looks fine to me (but I wouldn't have caught something like Jarek
did with the now-unused variables.)

johannes

Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)