Further Details on Problem:
Typical syslog output:
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.424273] Corrupted low
memory at 00000000a78dba88 (1000 phys) = 6000010000100000
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.424282] Corrupted low memory at
00000000d190a321 (1008 phys) = 100001000001c
... Many more Corrupted low memory lines ...
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426877] Corrupted low memory at
0000000077c65d2a (2428 phys) = 205135322078796e
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426881] Corrupted low memory at
00000000481794f1 (2430 phys) = 736569726553
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426885] Corrupted low memory at
0000000046f2b1b0 (2448 phys) = 80000000
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426905] ------------[ cut here
]------------
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426906] Memory corruption detected
in low memory
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426926] WARNING: CPU: 0 PID: 218
at /build/linux-81MBYC/linux-4.15.0/arch/x86/kernel/check.c:142
check_for_bios_corruption+0xab/0x100
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.426928] Modules linked in:
nls_iso8859_1 ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt
nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4
nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype input_leds
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables
nf_conntrack_netbios_ns snd_hda_codec_hdmi sch_fq_codel dcdbas dell_smm_hwmon
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
irqbypass crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul
snd_hda_codec_generic ghash_clmulni_intel snd_hda_intel pcbc snd_hda_codec arc4
snd_hda_core snd_hwdep snd_pcm nf_conntrack_broadcast aesni_intel ath9k
aes_x86_64 ath9k_common crypto_simd glue_helper cryptd intel_cstate ath9k_hw
intel_rapl_perf ath snd_seq_midi snd_seq_midi_event mac80211
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427018] snd_rawmidi snd_seq
cfg80211 ath3k btusb btrtl btbcm btintel snd_seq_device lpc_ich snd_timer
bluetooth snd ecdh_generic mei_me mei soundcore shpchp mac_hid parport_pc
nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c ppdev iptable_filter
lp parport ip_tables x_tables autofs4 hid_generic usbhid hid i915 i2c_algo_bit
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci drm r8169
libahci mii video
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427090] CPU: 0 PID: 218 Comm:
kworker/0:2 Not tainted 4.15.0-33-generic #36-Ubuntu
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427092] Hardware name: Dell Inc.
Inspiron 3847/088DT1 , BIOS A10 05/10/2018
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427099] Workqueue: events
check_corruption
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427108] RIP:
0010:check_for_bios_corruption+0xab/0x100
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427110] RSP: 0018:ffffb45cc1ee3e38
EFLAGS: 00010282
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427114] RAX: 0000000000000000 RBX:
ffff884700010000 RCX: 0000000000000006
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427117] RDX: 0000000000000007 RSI:
0000000000000092 RDI: ffff884a1fa16490
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427119] RBP: ffffb45cc1ee3e68 R08:
0000000000000000 R09: 00000000000005db
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427122] R10: 0000000000000000 R11:
ffffffffaff5380d R12: 0000000000000000
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427124] R13: ffffffffaff2d4f0 R14:
0000000000000001 R15: 0000000080000000
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427129] FS:
0000000000000000(0000) GS:ffff884a1fa00000(0000) knlGS:0000000000000000
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427131] CS: 0010 DS: 0000 ES:
0000 CR0: 0000000080050033
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427134] CR2: 00007f7e3b6a8008 CR3:
000000000e80a004 CR4: 00000000001606f0
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427137] Call Trace:
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427149] check_corruption+0xe/0x40
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427155]
process_one_work+0x1de/0x410
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427161] worker_thread+0x32/0x410
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427167] kthread+0x121/0x140
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427172] ?
process_one_work+0x410/0x410
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427178] ?
kthread_create_worker_on_cpu+0x70/0x70
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427185] ?
mm_account_pinned_pages.part.52+0x90/0x90
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427193] ret_from_fork+0x35/0x40
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427196] Code: c4 08 5b 41 5c 41 5d
41 5e 41 5f 5d c3 f3 c3 80 3d 10 31 5a 01 00 75 e6 48 c7 c7 70 3d 6c af c6 05
00 31 5a 01 01 e8 35 f4 01 00 <0f> 0b eb cf 48 89 da 4c 01 fa 72 35 4c 89 c0 48
2b 05 f7 d3 3d
Aug 28 16:48:34 Inspiron-3847 kernel: [ 62.427279] ---[ end trace
2737252561029e36 ]---
Have tested suspend via suspend keyboard key with no apparent problems (Ubuntu
18.04.1 LTS 4.15.0-33-generic)
so this works ok with NO Corrupted low memory.
Have tested suspend also in Linux Mint 19 Tara using shutdown/suspend menu
option and no apparent
problems (same kernel 4.15.0-33-generic) so this works ok with NO Corrupted low
memory
(Multi-boot system...)
Same Corrupted low memory messages on Linux Mint 19 Tara
4.15.0-33-generic when running 'cat /proc/i8k'
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https://bugs.launchpad.net/bugs/1789519
Title:
Low Memory corruption logged in syslog
Status in linux package in Ubuntu:
Confirmed
Bug description:
Dell Inspiron 3847 Desktop running Ubuntu 18.04.1 LTS
kernel: 4.15.0-33-generic
Corrupted low memory messages logged in syslog
Can be reproduced with script:
#!/bin/bash
# log to syslog...
logger -st low_mem_corruption.sh "Checking for low memory corruption with
kernel $(uname -rv)..."
# this will cause syslog messages on affected kernels...
cat /proc/i8k
logger -st low_mem_corruption.sh "Please wait for 90 secs to ensure low
memory test has completed..."
# sleep for 1.5 mins - enough time for mem check every 60 secs...
sleep 90
logger -st low_mem_corruption.sh "Check for low memory corruption done! Was
anything logged in syslog?"
Kernels tested:
Kernel 4.15.0-29-generic - fine
Kernel 4.15.0-30-generic - fine
Kernel 4.15.0-30-generic - Never installed, do not know - did it exist?
Kernel 4.15.0-32-generic - Low Memory corruption!
Kernel 4.15.0-33-generic - Low Memory corruption!
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-33-generic 4.15.0-33.36
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bossman 1316 F.... pulseaudio
/dev/snd/pcmC1D0p: bossman 1316 F...m pulseaudio
/dev/snd/controlC1: bossman 1316 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 28 16:56:01 2018
HibernationDevice: RESUME=UUID=1c065a24-2acf-43dc-bf3d-1382f3bbf0ac
InstallationDate: Installed on 2018-05-12 (108 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: Dell Inc. Inspiron 3847
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic
root=UUID=a5dec663-366e-4ecc-a17a-ce4219c54897 ro quiet loglevel=3 splash
RelatedPackageVersions:
linux-restricted-modules-4.15.0-33-generic N/A
linux-backports-modules-4.15.0-33-generic N/A
linux-firmware 1.173.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/10/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 088DT1
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA10:bd05/10/2018:svnDellInc.:pnInspiron3847:pvr:rvnDellInc.:rn088DT1:rvrA01:cvnDellInc.:ct3:cvr:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: Inspiron 3847
dmi.sys.vendor: Dell Inc.
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