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

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, 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
--
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/