GNU bug report logs - #58891
LKRG blocks modprobe due to hardcoded paths

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From: DonaldSanders1968 <DonaldSanders1968 <at> protonmail.ch>
To: 58891 <at> debbugs.gnu.org
Subject: bug#58891: LKRG blocks modprobe due to hardcoded paths
Date: Sun, 30 Oct 2022 04:51:16 +0000

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Hi Guix,

LKRG with default config on Guix system will resist executing modprobe. Its log message is like:

Oct 30 xx:xx:xx localhost vmunix: [ 2534.269558] LKRG: ALERT: BLOCK: UMH: Executing program name /gnu/store/fas8d76ws2xsdaiiyv822qy3tjx2an6x-modprobe

I found it is caused by hardcoded modprobe path in [src/modules/exploit_detection/syscalls/p_call_usermodehelper/p_call_usermodehelper.c](https://github.com/lkrg-org/lkrg/blob/main/src/modules/exploit_detection/syscalls/p_call_usermodehelper/p_call_usermodehelper.c), which includes a whitelist for UMH validation in LKRG.

Kind regards,
Don

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