linux-kernel - Re: [PATCH 1/2] livepatch: Add a new function to verify the address and name match for extra module

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Message-ID: <20150413083725.GA16088@pathway.suse.cz>
Date:	Mon, 13 Apr 2015 10:37:25 +0200
From:	Petr Mladek <pmladek@...e.cz>
To:	Minfei Huang <minfei.huang@...mail.com>
Cc:	jpoimboe@...hat.com, sjenning@...hat.com, jkosina@...e.cz,
	vojtech@...e.cz, live-patching@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] livepatch: Add a new function to verify the address
 and name match for extra module

On Sun 2015-04-12 21:15:53, Minfei Huang wrote:
> In order to restrict the patch, we can verify the provided function
> address and name match. Now we have can only verify the vmlinux function
> name and address.
> 
> Add a new function to verify extra module function name and address. The
> patch would not be patched, if the function name and address are not
> matched.

old_addr could be predefined only for vmlinux. It does not make sense
to define it for modules because they are loaded dynamically, each
time on a different addresses. It means that it does not make sense
to verify addresses from modules. They always need to be detected.

Best Regards,
Petr
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