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Date: Sat, 20 Jun 2020 22:38:43 +0200
From: Jacek <wampir990@...il.com>
To: lkrg-users@...ts.openwall.com
Subject: Re: Yes, Yes, Yes,p_lkrg has detected dangerous
exploits. ;)
Hi Alexander
I cannot reproduce the error at the moment, because after it appeared on
Linux-5.7.4,I updated the lkrg via git pull source, I built the module
again, and these errors do not occur anymore.
On the other hand, I was glad that for the first time I saw the activity
of the p_lkrg module, which I failed earlier despite testing over 30
different exploits.
If someday there are errors in the lkrg action, I will write about them,
for now I thank you for your help and angelic patience.
;)
Cheers
W dniu 20.06.2020 o 16:42, Solar Designer pisze:
> Hi Jacek,
>
> On Sat, Jun 20, 2020 at 03:56:22PM +0200, Jacek wrote:
>> Finally p_lkrg revealed its activities, I found the following messages
>> in dmesg:
>>
>> Jun 19 11:57:22 domek kernel: [46870.845646] [p_lkrg] <Exploit
>> Detection> ON process[3619 | thunderbird] has corrupted 'off' flag!
>> Jun 19 11:57:22 domek kernel: [46870.847161] [p_lkrg] <Exploit
>> Detection> Trying to kill process[AudioIPC Server | 3619]!
>> Jun 19 11:57:23 domek kernel: [46872.579300] [p_lkrg] <Exploit
>> Detection> ON process[400 | firefox] has corrupted 'off' flag!
>> Jun 19 11:57:23 domek kernel: [46872.580099] [p_lkrg] <Exploit
>> Detection> Trying to kill process[Cache2 I/O | 400]!
> Ouch. Are you able to reproduce this?
>
> Please set log_level=4 (via sysctl or module parameter), so that we have
> more detailed messages next time this occurs. (That log level is not
> suitable for production use. Please only use it while we debug this.)
>
> It could also make sense to try reverting the below commit (which might
> or might not be relevant), but we'd be more interested in having the
> issue reproduced with intact LKRG and verbose logging first, as above.
>
> commit 8c1a55f7e0105656802d290fc7240c894eb904e0
> Author: Adam_pi3 <pi3@....com.pl>
> Date: Wed May 13 17:38:19 2020 -0400
>
> Improve performance for flag validation
>
> Thanks,
>
> Alexander
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