linux-kernel - Re: [PATCH v9 10/14] module: kallsyms: Fix suspicious rcu usage

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:   Wed, 2 Mar 2022 17:02:02 +0000
From:   Aaron Tomlin <atomlin@...hat.com>
To:     pmladek@...e.com
Cc:     mcgrof@...nel.org, christophe.leroy@...roup.eu, cl@...ux.com,
        mbenes@...e.cz, akpm@...ux-foundation.org, jeyu@...nel.org,
        linux-kernel@...r.kernel.org, linux-modules@...r.kernel.org,
        void@...ifault.com, allen.lkml@...il.com, joe@...ches.com,
        msuchanek@...e.de, oleksandr@...alenko.name,
        jason.wessel@...driver.com, daniel.thompson@...aro.org,
        atomlin@...mlin.com
Subject: Re: [PATCH v9 10/14] module: kallsyms: Fix suspicious rcu usage

On Tue 2022-03-01 16:52 +0000, Aaron Tomlin wrote:
> Petr,
> 
> Any concerns?
> 
> Unfortunately, I didn't make enough time to test.

Petr,

$ sudo ./test-livepatch.sh
[sudo] password for atomlin:
TEST: basic function patching ... ok
TEST: multiple livepatches ... ok
TEST: atomic replace livepatch ... ok

 - dmesg output excerpt

[  209.354909] ===== TEST: basic function patching =====
[  209.435376] % modprobe test_klp_livepatch
[  209.467226] test_klp_livepatch: tainting kernel with TAINT_LIVEPATCH
[  209.539749] livepatch: enabling patch 'test_klp_livepatch'
[  209.539785] livepatch: 'test_klp_livepatch': initializing patching transition
[  209.543671] livepatch: 'test_klp_livepatch': starting patching transition
[  210.716486] livepatch: 'test_klp_livepatch': completing patching transition
[  210.717405] livepatch: 'test_klp_livepatch': patching complete
[  210.766777] % echo 0 > /sys/kernel/livepatch/test_klp_livepatch/enabled
[  210.767446] livepatch: 'test_klp_livepatch': initializing unpatching transition
[  210.767548] livepatch: 'test_klp_livepatch': starting unpatching transition
[  211.739802] livepatch: 'test_klp_livepatch': completing unpatching transition
[  211.778846] livepatch: 'test_klp_livepatch': unpatching complete
[  211.862102] % rmmod test_klp_livepatch


Kind regards,

-- 
Aaron Tomlin