linux-kernel - Re: [patch 7/7] stacktrace filtering for fault-injection capabilities

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 Oct 2006 14:20:04 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Akinobu Mita <akinobu.mita@...il.com>
Cc:	linux-kernel@...r.kernel.org, ak@...e.de,
	Don Mullis <dwm@...r.net>, Valdis.Kletnieks@...edu
Subject: Re: [patch 7/7] stacktrace filtering for fault-injection
 capabilities

On Thu, 12 Oct 2006 16:43:12 +0900
Akinobu Mita <akinobu.mita@...il.com> wrote:

> From: Akinobu Mita <akinobu.mita@...il.com>
> 
> This patch provides stacktrace filtering feature.
> The stacktrace filter allows failing only for the caller you are
> interested in.
> 
> stacktrace filter is enabled by setting the value of
> /debugfs/*/stacktrace-depth more than 0.
> and specify the range of the virtual address
> by the /debugfs/*/address-start and /debugfs/*/address-end
> 
> Please see the example that demostrates how to inject slab allocation
> failures only for a specific module
> in Documentation/fault-injection/fault-injection.txt

I read the documentation but I still don't understand this feature.  What
does the stacktrace actually do?  It gets stored somewhere and displayed
later?  What's it all for?

> --- work-fault-inject.orig/lib/Kconfig.debug
> +++ work-fault-inject/lib/Kconfig.debug
> @@ -472,6 +472,8 @@ config LKDTM
>  
>  config FAULT_INJECTION
>  	bool
> +	select STACKTRACE
> +	select FRAME_POINTER
>  
>  config FAILSLAB
>  	bool "fault-injection capabilitiy for kmalloc"
> 

Is the selection of FRAME_POINTER really needed?  The fancy new unwinder
is supposed to be able to handle frame-pointerless unwinding?
-
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/