linux-kernel - Re: [Bug #11954] sysprof tracer ABI regression in 2.6.28rc1

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:	Mon, 17 Nov 2008 17:24:31 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Soeren Sandmann <sandmann@...mi.au.dk>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Eric Anholt <eric@...olt.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Bug #11954] sysprof tracer ABI regression in 2.6.28rc1


* Soeren Sandmann <sandmann@...mi.au.dk> wrote:

> There are no ABI guarantees for the sysprof tracer at this point, 
> given that it is in debugfs [...]

to avoid situations like this, it would be nice to print out the 
format string itself in the trace header, in printf format string 
style. That way if there's a trivial expansion in trace format, it can 
be detected (and even followed) by user-space - without some ugly 
version based API.

	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/