linux-kernel - Re: [RFC] kreplace: Rebootless kernel updates

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: <200811241637.33329.knikanth@suse.de>
Date:	Mon, 24 Nov 2008 16:37:32 +0530
From:	Nikanth Karthikesan <knikanth@...e.de>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	linux-kernel@...r.kernel.org, ananth@...ibm.com,
	davem@...emloft.net, contact@...lice.com, jbarnold@...lice.com,
	tabbott@...lice.com, wdaher@...lice.com, andersk@...lice.com
Subject: Re: [RFC] kreplace: Rebootless kernel updates

On Friday 21 November 2008 20:09:52 Masami Hiramatsu wrote:
> Hi Nikanth,
>
> Nikanth Karthikesan wrote:

> Hmm,
> Would you like to replace a function to another function?
> If so, AFAIK, you can do that with kprobe and below pre_handler.
> (see booster enabled path in setup_singlestep())
>
> pre_handler(...)
> {
> 	reset_current_kprobe();	/* this kprobe doesn't need any more */
> 	regs->ip = new_function;	/* change IP to new function */
> 	preempt_enable_no_resched();	/* recover preempt count */
> 	return 1;	/* No need to setup singlestep */
> }
>
>

So, am I seeing worries to enable something, which is already possible, but 
just not documented?

Thanks
Nikanth Karthikesan



--
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/