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Date: Thu, 4 Jun 2020 15:54:38 +0200
From: Jacek <wampir990@...il.com>
To: lkrg-users@...ts.openwall.com
Subject: Re: Support for 5.7 linux kernel?
HI
I compiled the latest version of LKRG from git,
the module has built without a problem, but I can't load it.
My system:
Linux version 5.7.0-g1 (root@...ek) (gcc version 9.3.0 (Gentoo Hardened
9.3.0 p2), GNU ld (Gentoo 2.33.1 p2) 2.33.1) #2 SMP PREEMPT Mon Jun 1
20:03:30 CEST 2020
## cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.7.0-g1 root=/dev/sdb1 rootflags=discard
root_trim=yes video=HDMI-A-1:1920x1080@60 security=apparmor apparmor=1
spectre_v2=on spec_store_bypass_disable=on nosmt=force l1tf=full
init=/sbin/init loglevel=2 acpi_osi="Linux" i915.fastboot=1
intel_iommu=on spec_store_bypass_disable=seccomp
acpi_enforce_resources=lax initrd=/boot/microcode.cpio
LKRG version:
filename: /lib/modules/5.7.0-g1/extra/p_lkrg.ko
license: GPL v2
description: pi3's Linux kernel Runtime Guard
author: Adam 'pi3' Zabrocki (http://pi3.com.pl)
srcversion: 1606348BCF8AF6B8B76C455
depends:
retpoline: Y
name: p_lkrg
vermagic: 5.7.0-g1 SMP preempt mod_unload modversions
RANDSTRUCT_PLUGIN_ef6c602da94c0b38ee3353aa970b02005c9506ccfd022b488b7fcd548de3c84c
When I try to load the module:
# root ~> modprobe -v p_lkrg
insmod /lib/modules/5.7.0-g1/extra/p_lkrg.ko
modprobe: ERROR: could not insert 'p_lkrg': No buffer space available
result in Dmesg:
[ 216.961582] [p_lkrg] Loading LKRG...
[ 216.961586] check_preemption_disabled: 112 callbacks suppressed
[ 216.961587] BUG: using smp_processor_id() in preemptible [00000000]
code: modprobe/5658
[ 216.961594] caller is p_parse_module_params+0x15c/0x287 [p_lkrg]
[ 216.961595] CPU: 0 PID: 5658 Comm: modprobe Tainted: G C O
T 5.7.0-g1 #2
[ 216.961596] Hardware name: Gigabyte Technology Co., Ltd.
Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015
[ 216.961596] Call Trace:
[ 216.961600] dump_stack+0x50/0x68
[ 216.961602] debug_smp_processor_id.cold+0x4d/0x52
[ 216.961608] p_parse_module_params+0x15c/0x287 [p_lkrg]
[ 216.961613] p_lkrg_register+0x4b/0x1000 [p_lkrg]
[ 216.961614] ? 0xffffffffc040d000
[ 216.961616] do_one_initcall+0x56/0x230
[ 216.961619] do_init_module+0x59/0x210
[ 216.961620] load_module+0x2396/0x2710
[ 216.961623] ? __do_sys_finit_module+0xd7/0xf0
[ 216.961624] __do_sys_finit_module+0xd7/0xf0
[ 216.961626] do_syscall_64+0x94/0x220
[ 216.961628] ? do_syscall_64+0x27/0x220
[ 216.961631] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 216.961632] RIP: 0033:0x7f7072894509
[ 216.961633] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 57 09 0c 00 f7 d8 64 89 01 48
[ 216.961634] RSP: 002b:00007ffee33a77d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 216.961635] RAX: ffffffffffffffda RBX: 0000555691015960 RCX:
00007f7072894509
[ 216.961636] RDX: 0000000000000000 RSI: 0000555690ff1390 RDI:
0000000000000003
[ 216.961636] RBP: 0000000000040000 R08: 0000000000000000 R09:
0000555691017680
[ 216.961637] R10: 0000000000000003 R11: 0000000000000246 R12:
0000555690ff1390
[ 216.961637] R13: 0000000000000000 R14: 0000555691015a90 R15:
0000000000000000
[ 216.961639] BUG: using smp_processor_id() in preemptible [00000000]
code: modprobe/5658
[ 216.961644] caller is p_parse_module_params+0x1af/0x287 [p_lkrg]
[ 216.961645] CPU: 0 PID: 5658 Comm: modprobe Tainted: G C O
T 5.7.0-g1 #2
[ 216.961645] Hardware name: Gigabyte Technology Co., Ltd.
Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015
[ 216.961646] Call Trace:
[ 216.961647] dump_stack+0x50/0x68
[ 216.961648] debug_smp_processor_id.cold+0x4d/0x52
[ 216.961652] p_parse_module_params+0x1af/0x287 [p_lkrg]
[ 216.961657] p_lkrg_register+0x4b/0x1000 [p_lkrg]
[ 216.961658] ? 0xffffffffc040d000
[ 216.961659] do_one_initcall+0x56/0x230
[ 216.961661] do_init_module+0x59/0x210
[ 216.961662] load_module+0x2396/0x2710
[ 216.961665] ? __do_sys_finit_module+0xd7/0xf0
[ 216.961666] __do_sys_finit_module+0xd7/0xf0
[ 216.961668] do_syscall_64+0x94/0x220
[ 216.961669] ? do_syscall_64+0x27/0x220
[ 216.961670] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 216.961671] RIP: 0033:0x7f7072894509
[ 216.961672] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 57 09 0c 00 f7 d8 64 89 01 48
[ 216.961673] RSP: 002b:00007ffee33a77d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 216.961673] RAX: ffffffffffffffda RBX: 0000555691015960 RCX:
00007f7072894509
[ 216.961674] RDX: 0000000000000000 RSI: 0000555690ff1390 RDI:
0000000000000003
[ 216.961674] RBP: 0000000000040000 R08: 0000000000000000 R09:
0000555691017680
[ 216.961675] R10: 0000000000000003 R11: 0000000000000246 R12:
0000555690ff1390
[ 216.961675] R13: 0000000000000000 R14: 0000555691015a90 R15:
0000000000000000
[ 216.961677] [p_lkrg] System does NOT support SMAP. LKRG can't enforce
SMAP validation :(
[ 216.973992] Freezing user space processes ... (elapsed 0.003 seconds)
done.
[ 216.977069] OOM killer disabled.
[ 216.977196] [p_lkrg] 4/23 UMH paths were whitelisted...
[ 216.988440] [p_lkrg] [ED] ERROR: Can't find 'selinux_state' variable
:( Exiting...
[ 216.988441] [p_lkrg] Can't initialize exploit detection features!
Exiting...
[ 217.020119] OOM killer enabled.
[ 217.020120] Restarting tasks ... done.
Jacekalex
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