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Date: Mon, 2 Nov 2020 22:15:30 +0100
From: Adam Zabrocki <pi3@....com.pl>
To: lkrg-users@...ts.openwall.com
Subject: Re: Fwd: Re: P_LKRG error in Linux 5.9.3
Hi,
I've just pushed fixes for the reported issue. Thanks for the details!
Thanks,
Adam
On Mon, Nov 02, 2020 at 06:14:21PM +0100, Jacek wrote:
>
> HI
>
> There is an improvement.
> After applying the commit:
>
> commit 83cb64640a70273f8c73c6d9e6b02cf1a094b054 (HEAD -> main, origin/main,
> origin/HEAD)
> Author: Adam_pi3 <pi3@....com.pl>
> Date: Mon Nov 2 01:43:02 2020 -0500
>
> Fix p_lkrg_counter_lock_trylock() API
>
> spin_trylock() disables preemption under the hood.
>
>
> there is still some strange message on landing, but then LRG no longer
> reports similar errors
>
>
> Loading log:
>
> # root ~> dmesg
> [ 1460.036545] [p_lkrg] Loading LKRG...
> [ 1460.036548] [p_lkrg] System does NOT support SMAP. LKRG can't enforce
> SMAP validation :(
> [ 1460.049691] Freezing user space processes ... (elapsed 0.002 seconds)
> done.
> [ 1460.052220] OOM killer disabled.
> [ 1460.052237] [p_lkrg] 5/23 UMH paths are allowed...
> [ 1463.671449] [p_lkrg] [kretprobe] register_kretprobe() for
> <ttwu_do_wakeup> failed! [err=-22]
> [ 1463.671455] [p_lkrg] Trying to find ISRA / CONSTPROP name for
> <ttwu_do_wakeup>
> [ 1463.675621] [p_lkrg] Found ISRA version of function
> <ttwu_do_wakeup.isra.0>
> [ 1463.791478] [p_lkrg] ISRA / CONSTPROP version was found and hook was
> planted at <ttwu_do_wakeup.isra.0>
> [ 1464.219919] BUG: scheduling while atomic: modprobe/1413/0x00000002
> [ 1464.219921] Modules linked in: p_lkrg(O+) r8188eu(C) lib80211 [last
> unloaded: p_lkrg]
> [ 1464.219924] Preemption disabled at:
> [ 1464.219925] [<0000000000000000>] 0x0
> [ 1464.219927] CPU: 1 PID: 1413 Comm: modprobe Tainted: G WC O T 5.9.3-g1
> #2
> [ 1464.219928] Hardware name: Gigabyte Technology Co., Ltd.
> Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015
> [ 1464.219928] Call Trace:
> [ 1464.219931] dump_stack+0x57/0x70
> [ 1464.219933] __schedule_bug.cold+0x83/0x91
> [ 1464.219934] __schedule+0x5fc/0x6c0
> [ 1464.219936] schedule+0x44/0xe0
> [ 1464.219937] trace_clock_x86_tsc+0x10/0x10
> [ 1464.219939] ? __mutex_lock.isra.0+0x279/0x540
> [ 1464.219947] ? p_create_database+0x14f/0x300 [p_lkrg]
> [ 1464.219951] ? p_lkrg_register+0x3d7/0x1000 [p_lkrg]
> [ 1464.219952] ? 0xffffffffc0212000
> [ 1464.219953] ? do_one_initcall+0x5a/0x19f
> [ 1464.219955] ? do_init_module+0x54/0x200
> [ 1464.219956] ? load_module+0x233f/0x2660
> [ 1464.219959] ? __do_sys_finit_module+0xd5/0xf0
> [ 1464.219960] ? __do_sys_finit_module+0xd5/0xf0
> [ 1464.219962] ? do_syscall_64+0x33/0x40
> [ 1464.219964] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 1464.273289] [p_lkrg] LKRG initialized successfully!
> [ 1464.273292] OOM killer enabled.
> [ 1464.273293] Restarting tasks ... done.
>
>
> Cheers
> >
> >
> > ------------------------------------------------------------------------
> > *Od:* Adam Zabrocki <pi3@....com.pl>
> > *Wysłane:* November 2, 2020 4:40:57 AM UTC
> > *Do:* lkrg-users@...ts.openwall.com
> > *Temat:* Re: [lkrg-users] P_LKRG error in Linux 5.9.3
> >
> > Hi,
> >
> > Can you try LKRG with the latest patches (pushed today) and verify if you see
> > the same problem?
> >
> > Thanks,
> > Adam
> >
> > On Mon, Nov 02, 2020 at 05:02:04AM +0100, Jacek wrote:
> >
> > HI LKRG version: # root ~> modinfo p_lkrg filename:
> > /lib/modules/5.9.3-g1/extra/p_lkrg.ko license: GPL v2
> > description: pi3's Linux kernel Runtime Guard author:
> > Adam 'pi3' Zabrocki (http://pi3.com.pl <http://pi3.com.pl>)
> > srcversion: EEC95B0840D6CC7AA27D2E3 depends: retpoline: Y
> > name: p_lkrg vermagic: 5.9.3-g1 SMP preempt
> > mod_unload modversions
> > RANDSTRUCT_PLUGIN_366bedefd89976f1b4c46144945391fda92f7f7735ea0773c232d89a1537a832
> > sig_id: PKCS#7 signer: domek.cert sig_key:
> > 9B:90:A7:9D:13:60:77:B8 sig_hashalgo: sha512 The following
> > message appears periodically in logs and tty consoles: [
> > 1753.134389] BUG: workqueue leaked lock or atomic:
> > kworker/u8:0/0x00000001/1102 last function:
> > p_check_integrity [p_lkrg] [ 1753.134397] CPU: 3 PID: 1102 Comm:
> > kworker/u8:0 Tainted: G WC O T 5.9.3-g1 #2 [ 1753.134400]
> > Hardware name: Gigabyte Technology Co., Ltd. Z97-D3H/Z97-D3H-CF,
> > BIOS F9 09/18/2015 [ 1753.134408] Workqueue: events_unbound
> > p_check_integrity [p_lkrg] [ 1753.134411] Call Trace: [
> > 1753.134422] dump_stack+0x57/0x70 [ 1753.134430]
> > process_one_work.cold+0x2b/0x30 [ 1753.134436] ?
> > process_one_work+0x2e0/0x2e0 [ 1753.134440]
> > worker_thread+0x4b/0x390 [ 1753.134445] ?
> > process_one_work+0x2e0/0x2e0 [ 1753.134449] kthread+0x118/0x160 [
> > 1753.134453] ? kthread_park+0x80/0x80 [ 1753.134458]
> > ret_from_fork+0x22/0x30 [ 1753.134465] BUG: scheduling while
> > atomic: kworker/u8:0/1102/0x00000002 [ 1753.134467] Modules linked
> > in: p_lkrg(O) r8188eu(C) lib80211 [ 1753.134473] Preemption
> > disabled at: [ 1753.134480] [<ffffffffc0423328>]
> > p_check_integrity+0xf8/0x1140 [p_lkrg] [ 1753.134484] CPU: 3 PID:
> > 1102 Comm: kworker/u8:0 Tainted: G WC O T 5.9.3-g1 #2 [
> > 1753.134486] Hardware name: Gigabyte Technology Co., Ltd.
> > Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015 [ 1753.134489] Workqueue:
> > 0x0 (events_unbound) [ 1753.134492] Call Trace: [ 1753.134497]
> > dump_stack+0x57/0x70 [ 1753.134503] __schedule_bug.cold+0x83/0x91
> > [ 1753.134509] __schedule+0x5fc/0x6c0 [ 1753.134514] ?
> > process_one_work+0x2e0/0x2e0 [ 1753.134518] schedule+0x44/0xe0 [
> > 1753.134522] worker_thread+0xc1/0x390 [ 1753.134527] ?
> > process_one_work+0x2e0/0x2e0 [ 1753.134530] kthread+0x118/0x160 [
> > 1753.134534] ? kthread_park+0x80/0x80 [ 1753.134537]
> > ret_from_fork+0x22/0x30 [ 1768.493370] BUG: workqueue leaked lock
> > or atomic: kworker/u8:0/0x00000001/1102 last
> > function: p_check_integrity [p_lkrg] [ 1768.493378] CPU: 0 PID:
> > 1102 Comm: kworker/u8:0 Tainted: G WC O T 5.9.3-g1 #2 [
> > 1768.493381] Hardware name: Gigabyte Technology Co., Ltd.
> > Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015 [ 1768.493390] Workqueue:
> > events_unbound p_check_integrity [p_lkrg] [ 1768.493393] Call
> > Trace: [ 1768.493405] dump_stack+0x57/0x70 [ 1768.493414]
> > process_one_work.cold+0x2b/0x30 [ 1768.493420] ?
> > process_one_work+0x2e0/0x2e0 [ 1768.493424]
> > worker_thread+0x4b/0x390 [ 1768.493430] ?
> > process_one_work+0x2e0/0x2e0 [ 1768.493434] kthread+0x118/0x160 [
> > 1768.493438] ? kthread_park+0x80/0x80 [ 1768.493443]
> > ret_from_fork+0x22/0x30 [ 1768.493451] BUG: scheduling while
> > atomic: kworker/u8:0/1102/0x00000002 [ 1768.493453] Modules linked
> > in: p_lkrg(O) r8188eu(C) lib80211 [ 1768.493459] Preemption
> > disabled at: [ 1768.493467] [<ffffffffc0423328>]
> > p_check_integrity+0xf8/0x1140 [p_lkrg] [ 1768.493471] CPU: 0 PID:
> > 1102 Comm: kworker/u8:0 Tainted: G WC O T 5.9.3-g1 #2 [
> > 1768.493473] Hardware name: Gigabyte Technology Co., Ltd.
> > Z97-D3H/Z97-D3H-CF, BIOS F9 09/18/2015 [ 1768.493477] Workqueue:
> > 0x0 (events_unbound) [ 1768.493480] Call Trace: [ 1768.493485]
> > dump_stack+0x57/0x70 [ 1768.493491] __schedule_bug.cold+0x83/0x91
> > [ 1768.493497] __schedule+0x5fc/0x6c0 [ 1768.493503] ?
> > process_one_work+0x2e0/0x2e0 [ 1768.493507] schedule+0x44/0xe0 [
> > 1768.493512] worker_thread+0xc1/0x390 [ 1768.493517] ?
> > process_one_work+0x2e0/0x2e0 [ 1768.493521] kthread+0x118/0x160 [
> > 1768.493524] ? kthread_park+0x80/0x80 [ 1768.493528]
> > ret_from_fork+0x22/0x30 Cheers
> >
> >
> > --
> > pi3 (pi3ki31ny) - pi3 (at) itsec pl
> > http://pi3.com.pl <http://pi3.com.pl>
> >
> >
> > -- Wysłane za pomocą K-9 Mail.
--
pi3 (pi3ki31ny) - pi3 (at) itsec pl
http://pi3.com.pl
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