linux-kernel - Re: [PATCH 2/2] perf lock: Fix output of tracing lock events

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: <20091217100922.GA23778@elte.hu>
Date:	Thu, 17 Dec 2009 11:09:22 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 2/2] perf lock: Fix output of tracing lock events


* Peter Zijlstra <peterz@...radead.org> wrote:

> >  	TP_STRUCT__entry(
> > +		__field(struct lockdep_map *, lockdep_addr)
> >  		__field(unsigned int, flags)
> >  		__string(name, lock->name)
> >  	),
> 
> I feel a bit awkward explicitly leaking kernel pointers like that. All this 
> is accessible by root only (for now) so its not too harmfull, but sitll.

What would you suggest as a 'natural lock class key'? The name? It might not 
be unique enough.

Other kernel objects like tasks, cpus, inodes, pages all have some natural key 
that isnt a kernel pointer - but locks are a bit special.

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/