(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).


On Tue, 03 Nov 2020 20:00:58 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=210031
> 
>             Bug ID: 210031
>            Summary: unable to handle page fault for address - EIP:
>                     khugepaged
>            Product: Memory Management
>            Version: 2.5
>     Kernel Version: 5.9.1
>           Hardware: All
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>           Assignee: akpm@linux-foundation.org
>           Reporter: newsmails@netcourrier.com
>         Regression: No

Thanks.  That's a strange looking trace.  I'll optimistically cc some
people who have been working in that area lately.

What caused this kernel to be tainted?


> laptop Skylake i915 
> Distribution : slackware 14.2 32 bits
> 
> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle page
> fault
> for address: 021d202d
> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read access in
> kernel mode
> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) -
> not-present page
> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
> Oct 23 17:38:22 linuxp kernel: [141330.499274] CPU: 0 PID: 37 Comm:
> khugepaged
> Tainted: G      D   I       5.9.1 #1
> Oct 23 17:38:22 linuxp kernel: [141330.499278] Hardware name: Notebook        
>                W65_W67RZ/W65_W67RZ, BIOS 1.05.06 02/22/2016
> Oct 23 17:38:22 linuxp kernel: [141330.499289] EIP: khugepaged+0x599/0x2226
> Oct 23 17:38:22 linuxp kernel: [141330.499296] Code: e8 e8 bf 99 00 8b 45 a0
> 8b
> 40 2c 85 c0 75 0e 89 7d 90 8d 43 01 89 45 8c e9 5c fe ff ff 8b 45 a0 8b 80 e4
> 01 00 00 85 c0 75 e5 <8b> 57 2c 89 f8 e8 d3 d6 ff ff 88 85 6c ff ff ff 84 c0
> 0f
> 84 b5 00
> Oct 23 17:38:22 linuxp kernel: [141330.499303] EAX: 00000000 EBX: 0000043a
> ECX:
> 00000000 EDX: e9b0cf88
> Oct 23 17:38:22 linuxp kernel: [141330.499308] ESI: 00000000 EDI: 021d2001
> EBP:
> eff61f8c ESP: eff61e64
> Oct 23 17:38:22 linuxp kernel: [141330.499314] DS: 007b ES: 007b FS: 00d8 GS:
> 00e0 SS: 0068 EFLAGS: 00010246
> Oct 23 17:38:22 linuxp kernel: [141330.499319] CR0: 80050033 CR2: 021d202d
> CR3:
> 2606c000 CR4: 003506f0
> Oct 23 17:38:22 linuxp kernel: [141330.499324] DR0: 00000000 DR1: 00000000
> DR2:
> 00000000 DR3: 00000000
> Oct 23 17:38:22 linuxp kernel: [141330.499328] DR6: fffe0ff0 DR7: 00000400
> Oct 23 17:38:22 linuxp kernel: [141330.499331] Call Trace:
> Oct 23 17:38:22 linuxp kernel: [141330.499348]  ? wait_woken+0x67/0x67
> Oct 23 17:38:22 linuxp kernel: [141330.499357]  kthread+0xde/0x10a
> Oct 23 17:38:22 linuxp kernel: [141330.499364]  ?
> collapse_pte_mapped_thp+0x468/0x468
> Oct 23 17:38:22 linuxp kernel: [141330.499370]  ? kthread_unpark+0x60/0x60
> Oct 23 17:38:22 linuxp kernel: [141330.499377]  ret_from_fork+0x1c/0x28
> Oct 23 17:38:22 linuxp kernel: [141330.499382] Modules linked in: appletalk
> psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc videobuf2_memops btusb
> videobuf2_v4l2 hid_generic btrtl btbcm videobuf2_common btintel videodev
> bluetooth mc usbhid hid ecdh_generic ecc rtsx_pci_sdmmc joydev mmc_core
> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i2c_dev
> ledtrig_audio coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit
> x86_pkg_temp_thermal mac80211 drm_kms_helper intel_powerclamp rtsx_pci
> realtek
> drm kvm_intel mdio_devres mfd_core libphy kvm intel_gtt irqbypass
> crc32_pclmul
> iwlwifi snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw
> fb_sys_fops
> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea wmi
> thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer xhci_pci
> i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me soundcore
> video
> mei i2c_core acpi_pad ac loop
> Oct 23 17:38:22 linuxp kernel: [141330.499482] CR2: 00000000021d202d
> Oct 23 17:38:22 linuxp kernel: [141330.499489] ---[ end trace
> c79bfd2669dd9a27
> ]---
> Oct 23 17:38:22 linuxp kernel: [141330.499497] EIP: m_next+0x1c/0x44
> Oct 23 17:38:22 linuxp kernel: [141330.499503] Code: 24 08 d4 e6 c1 e8 1a 77
> e2
> ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 0c 39 da 74 24
> 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 5f 5d c3 be ff ff ff
> ff
> 31 ff 85
> Oct 23 17:38:22 linuxp kernel: [141330.499509] EAX: 021d2001 EBX: 00000000
> ECX:
> eeb9e56c EDX: eca0f000
> Oct 23 17:38:22 linuxp kernel: [141330.499514] ESI: 00000000 EDI: c128cad0
> EBP:
> e59bff0c ESP: e59bff00
> Oct 23 17:38:22 linuxp kernel: [141330.499519] DS: 007b ES: 007b FS: 00d8 GS:
> 00e0 SS: 0068 EFLAGS: 00010202
> Oct 23 17:38:22 linuxp kernel: [141330.499524] CR0: 80050033 CR2: 021d202d
> CR3:
> 2606c000 CR4: 003506f0
> Oct 23 17:38:22 linuxp kernel: [141330.499529] DR0: 00000000 DR1: 00000000
> DR2:
> 00000000 DR3: 00000000
> Oct 23 17:38:22 linuxp kernel: [141330.499532] DR6: fffe0ff0 DR7: 00000400
> Oct 23 18:11:53 linuxp kernel: [143342.655918] BUG: unable to handle page
> fault
> for address: 021d2001
> Oct 23 18:11:53 linuxp kernel: [143342.655929] #PF: supervisor read access in
> kernel mode
> Oct 23 18:11:53 linuxp kernel: [143342.655933] #PF: error_code(0x0000) -
> not-present page
> Oct 23 18:11:53 linuxp kernel: [143342.655948] Oops: 0000 [#3] SMP PTI
> Oct 23 18:11:53 linuxp kernel: [143342.655956] CPU: 2 PID: 6287 Comm: DOM
> Worker Tainted: G      D   I       5.9.1 #1
> Oct 23 18:11:53 linuxp kernel: [143342.655960] Hardware name: Notebook        
>                W65_W67RZ/W65_W67RZ, BIOS 1.05.06 02/22/2016
> Oct 23 18:11:53 linuxp kernel: [143342.655971] EIP: acct_collect+0x4c/0x166
> Oct 23 18:11:53 linuxp kernel: [143342.655978] Code: 00 00 85 c9 0f 84 2c 01
> 00
> 00 8b 87 a4 02 00 00 83 c0 44 e8 09 8b aa 00 8b 87 a4 02 00 00 8b 00 85 c0 0f
> 84 15 01 00 00 31 d2 <2b> 10 03 50 04 8b 40 08 85 c0 75 f4 89 d7 c1 ef 0a 64
> a1
> dc 26 1b
> Oct 23 18:11:53 linuxp kernel: [143342.655985] EAX: 021d2001 EBX: 0000000f
> ECX:
> eea698c0 EDX: 06744fff
> Oct 23 18:11:53 linuxp kernel: [143342.655991] ESI: eed4f900 EDI: e5189700
> EBP:
> e551de54 ESP: e551de48
> Oct 23 18:11:53 linuxp kernel: [143342.655998] DS: 007b ES: 007b FS: 00d8 GS:
> 00e0 SS: 0068 EFLAGS: 00210202
> Oct 23 18:11:53 linuxp kernel: [143342.656004] CR0: 80050033 CR2: 021d2001
> CR3:
> 250c6000 CR4: 003506f0
> Oct 23 18:11:53 linuxp kernel: [143342.656008] DR0: 00000000 DR1: 00000000
> DR2:
> 00000000 DR3: 00000000
> Oct 23 18:11:53 linuxp kernel: [143342.656012] DR6: fffe0ff0 DR7: 00000400
> Oct 23 18:11:53 linuxp kernel: [143342.656015] Call Trace:
> Oct 23 18:11:53 linuxp kernel: [143342.656024]  do_exit+0x168/0xa5d
> Oct 23 18:11:53 linuxp kernel: [143342.656033]  ?
> prepare_to_wait_event+0x5a/0xc8
> Oct 23 18:11:53 linuxp kernel: [143342.656039]  do_group_exit+0x35/0x8a
> Oct 23 18:11:53 linuxp kernel: [143342.656046]  get_signal+0x146/0x88b
> Oct 23 18:11:53 linuxp kernel: [143342.656055]  arch_do_signal+0x23/0x594
> Oct 23 18:11:53 linuxp kernel: [143342.656064]  ? vfs_read+0xe0/0x17f
> Oct 23 18:11:53 linuxp kernel: [143342.656071] 
> exit_to_user_mode_prepare+0xd4/0x135
> Oct 23 18:11:53 linuxp kernel: [143342.656080] 
> syscall_exit_to_user_mode+0x23/0x14d
> Oct 23 18:11:53 linuxp kernel: [143342.656087]  do_int80_syscall_32+0x36/0x39
> Oct 23 18:11:53 linuxp kernel: [143342.656093]  entry_INT80_32+0xf7/0xf7
> Oct 23 18:11:53 linuxp kernel: [143342.656097] EIP: 0xafc314c4
> Oct 23 18:11:53 linuxp kernel: [143342.656103] Code: 89 38 85 f6 78 73 8d 75
> a7
> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 8b 7d e8 89 f1 ba 01 00 00 00 b8 03 00
> 00 00 53 89 fb cd 80 <5b> 3d 01 f0 ff ff 72 10 89 c7 f7 df e8 eb ad 3d fd 83
> ff
> 04 89 38
> Oct 23 18:11:53 linuxp kernel: [143342.656107] EAX: fffffe00 EBX: 00000007
> ECX:
> 90dfdd9f EDX: 00000001
> Oct 23 18:11:53 linuxp kernel: [143342.656111] ESI: 90dfdd9f EDI: 00000007
> EBP:
> 90dfddf8 ESP: 90dfdd7c
> Oct 23 18:11:53 linuxp kernel: [143342.656115] DS: 007b ES: 007b FS: 0000 GS:
> 0033 SS: 007b EFLAGS: 00200206
> Oct 23 18:11:53 linuxp kernel: [143342.656119] Modules linked in: appletalk
> psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc videobuf2_memops btusb
> videobuf2_v4l2 hid_generic btrtl btbcm videobuf2_common btintel videodev
> bluetooth mc usbhid hid ecdh_generic ecc rtsx_pci_sdmmc joydev mmc_core
> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i2c_dev
> ledtrig_audio coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit
> x86_pkg_temp_thermal mac80211 drm_kms_helper intel_powerclamp rtsx_pci
> realtek
> drm kvm_intel mdio_devres mfd_core libphy kvm intel_gtt irqbypass
> crc32_pclmul
> iwlwifi snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw
> fb_sys_fops
> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea wmi
> thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer xhci_pci
> i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me soundcore
> video
> mei i2c_core acpi_pad ac loop
> Oct 23 18:11:53 linuxp kernel: [143342.656223] CR2: 00000000021d2001
> Oct 23 18:11:53 linuxp kernel: [143342.656230] ---[ end trace
> c79bfd2669dd9a28
> ]---
> Oct 23 18:11:53 linuxp kernel: [143342.656238] EIP: m_next+0x1c/0x44
> Oct 23 18:11:53 linuxp kernel: [143342.656243] Code: 24 08 d4 e6 c1 e8 1a 77
> e2
> ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 0c 39 da 74 24
> 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 5f 5d c3 be ff ff ff
> ff
> 31 ff 85
> Oct 23 18:11:53 linuxp kernel: [143342.656248] EAX: 021d2001 EBX: 00000000
> ECX:
> eeb9e56c EDX: eca0f000
> Oct 23 18:11:53 linuxp kernel: [143342.656252] ESI: 00000000 EDI: c128cad0
> EBP:
> e59bff0c ESP: e59bff00
> Oct 23 18:11:53 linuxp kernel: [143342.656258] DS: 007b ES: 007b FS: 00d8 GS:
> 00e0 SS: 0068 EFLAGS: 00010202
> Oct 23 18:11:53 linuxp kernel: [143342.656262] CR0: 80050033 CR2: 021d2001
> CR3:
> 250c6000 CR4: 003506f0
> Oct 23 18:11:53 linuxp kernel: [143342.656266] DR0: 00000000 DR1: 00000000
> DR2:
> 00000000 DR3: 00000000
> Oct 23 18:11:53 linuxp kernel: [143342.656270] DR6: fffe0ff0 DR7: 00000400
> Oct 23 18:11:53 linuxp kernel: [143342.656274] Fixing recursive fault but
> reboot is needed!
> 
> -- 
> You are receiving this mail because:
> You are the assignee for the bug.

On 11/4/20 1:17 AM, Andrew Morton wrote:
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
>
> On Tue, 03 Nov 2020 20:00:58 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=210031
>>
>>              Bug ID: 210031
>>             Summary: unable to handle page fault for address - EIP:
>>                      khugepaged
>>             Product: Memory Management
>>             Version: 2.5
>>      Kernel Version: 5.9.1
>>            Hardware: All
>>                  OS: Linux
>>                Tree: Mainline
>>              Status: NEW
>>            Severity: normal
>>            Priority: P1
>>           Component: Other
>>            Assignee: akpm@linux-foundation.org
>>            Reporter: newsmails@netcourrier.com
>>          Regression: No
> Thanks.  That's a strange looking trace.  I'll optimistically cc some
> people who have been working in that area lately.
>
> What caused this kernel to be tainted?
>

I always use hibernate.
I also use firefox with  some tabs and it uses a lot of memory. (I have 
a 4 Go laptop)
I have a lot of bugs when I resume.
This bug arises when I resume.
The first occurence in syslog is in march :

May 17 08:09:21 linuxp kernel: [100318.618834] BUG: unable to handle 
kernel paging request at 024f402d
May 17 08:09:21 linuxp kernel: [100318.618842] #PF error: [normal kernel 
read fault]
May 17 08:09:21 linuxp kernel: [100318.618855] Oops: 0000 [#1] SMP PTI
May 17 08:09:21 linuxp kernel: [100318.618862] CPU: 3 PID: 36 Comm: 
khugepaged Tainted: G           O      5.0.11 #1
May 17 08:09:21 linuxp kernel: [100318.618866] Hardware name: 
Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06 
02/22/2016
May 17 08:09:21 linuxp kernel: [100318.618877] EIP: khugepaged+0x506/0x3310

With "BUG: unable to handle page fault for address" there are several 
EIP in syslog file :
Jan 22 08:12:44 linuxp kernel: [ 9791.101301] EIP: 
kmem_cache_alloc+0x8b/0x270
Nov  3 08:27:22 linuxp kernel: [74582.477572] EIP: 
__reset_isolation_pfn+0x190/0x250
Oct  8 23:45:20 linuxp kernel: [21038.109924] EIP: __fput+0x49/0x250

I am an end-user so I can't give more info...

>> laptop Skylake i915
>> Distribution : slackware 14.2 32 bits
>>
>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle page
>> fault
>> for address: 021d202d
>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read access
>> in
>> kernel mode
>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) -
>> not-present page
>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
>> Oct 23 17:38:22 linuxp kernel: [141330.499274] CPU: 0 PID: 37 Comm:
>> khugepaged
>> Tainted: G      D   I       5.9.1 #1
>> Oct 23 17:38:22 linuxp kernel: [141330.499278] Hardware name: Notebook
>>                 W65_W67RZ/W65_W67RZ, BIOS 1.05.06 02/22/2016
>> Oct 23 17:38:22 linuxp kernel: [141330.499289] EIP: khugepaged+0x599/0x2226
>> Oct 23 17:38:22 linuxp kernel: [141330.499296] Code: e8 e8 bf 99 00 8b 45 a0
>> 8b
>> 40 2c 85 c0 75 0e 89 7d 90 8d 43 01 89 45 8c e9 5c fe ff ff 8b 45 a0 8b 80
>> e4
>> 01 00 00 85 c0 75 e5 <8b> 57 2c 89 f8 e8 d3 d6 ff ff 88 85 6c ff ff ff 84 c0
>> 0f
>> 84 b5 00
>> Oct 23 17:38:22 linuxp kernel: [141330.499303] EAX: 00000000 EBX: 0000043a
>> ECX:
>> 00000000 EDX: e9b0cf88
>> Oct 23 17:38:22 linuxp kernel: [141330.499308] ESI: 00000000 EDI: 021d2001
>> EBP:
>> eff61f8c ESP: eff61e64
>> Oct 23 17:38:22 linuxp kernel: [141330.499314] DS: 007b ES: 007b FS: 00d8
>> GS:
>> 00e0 SS: 0068 EFLAGS: 00010246
>> Oct 23 17:38:22 linuxp kernel: [141330.499319] CR0: 80050033 CR2: 021d202d
>> CR3:
>> 2606c000 CR4: 003506f0
>> Oct 23 17:38:22 linuxp kernel: [141330.499324] DR0: 00000000 DR1: 00000000
>> DR2:
>> 00000000 DR3: 00000000
>> Oct 23 17:38:22 linuxp kernel: [141330.499328] DR6: fffe0ff0 DR7: 00000400
>> Oct 23 17:38:22 linuxp kernel: [141330.499331] Call Trace:
>> Oct 23 17:38:22 linuxp kernel: [141330.499348]  ? wait_woken+0x67/0x67
>> Oct 23 17:38:22 linuxp kernel: [141330.499357]  kthread+0xde/0x10a
>> Oct 23 17:38:22 linuxp kernel: [141330.499364]  ?
>> collapse_pte_mapped_thp+0x468/0x468
>> Oct 23 17:38:22 linuxp kernel: [141330.499370]  ? kthread_unpark+0x60/0x60
>> Oct 23 17:38:22 linuxp kernel: [141330.499377]  ret_from_fork+0x1c/0x28
>> Oct 23 17:38:22 linuxp kernel: [141330.499382] Modules linked in: appletalk
>> psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc videobuf2_memops btusb
>> videobuf2_v4l2 hid_generic btrtl btbcm videobuf2_common btintel videodev
>> bluetooth mc usbhid hid ecdh_generic ecc rtsx_pci_sdmmc joydev mmc_core
>> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i2c_dev
>> ledtrig_audio coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit
>> x86_pkg_temp_thermal mac80211 drm_kms_helper intel_powerclamp rtsx_pci
>> realtek
>> drm kvm_intel mdio_devres mfd_core libphy kvm intel_gtt irqbypass
>> crc32_pclmul
>> iwlwifi snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw
>> fb_sys_fops
>> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea wmi
>> thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer xhci_pci
>> i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me soundcore
>> video
>> mei i2c_core acpi_pad ac loop
>> Oct 23 17:38:22 linuxp kernel: [141330.499482] CR2: 00000000021d202d
>> Oct 23 17:38:22 linuxp kernel: [141330.499489] ---[ end trace
>> c79bfd2669dd9a27
>> ]---
>> Oct 23 17:38:22 linuxp kernel: [141330.499497] EIP: m_next+0x1c/0x44
>> Oct 23 17:38:22 linuxp kernel: [141330.499503] Code: 24 08 d4 e6 c1 e8 1a 77
>> e2
>> ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 0c 39 da 74
>> 24
>> 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 5f 5d c3 be ff ff ff
>> ff
>> 31 ff 85
>> Oct 23 17:38:22 linuxp kernel: [141330.499509] EAX: 021d2001 EBX: 00000000
>> ECX:
>> eeb9e56c EDX: eca0f000
>> Oct 23 17:38:22 linuxp kernel: [141330.499514] ESI: 00000000 EDI: c128cad0
>> EBP:
>> e59bff0c ESP: e59bff00
>> Oct 23 17:38:22 linuxp kernel: [141330.499519] DS: 007b ES: 007b FS: 00d8
>> GS:
>> 00e0 SS: 0068 EFLAGS: 00010202
>> Oct 23 17:38:22 linuxp kernel: [141330.499524] CR0: 80050033 CR2: 021d202d
>> CR3:
>> 2606c000 CR4: 003506f0
>> Oct 23 17:38:22 linuxp kernel: [141330.499529] DR0: 00000000 DR1: 00000000
>> DR2:
>> 00000000 DR3: 00000000
>> Oct 23 17:38:22 linuxp kernel: [141330.499532] DR6: fffe0ff0 DR7: 00000400
>> Oct 23 18:11:53 linuxp kernel: [143342.655918] BUG: unable to handle page
>> fault
>> for address: 021d2001
>> Oct 23 18:11:53 linuxp kernel: [143342.655929] #PF: supervisor read access
>> in
>> kernel mode
>> Oct 23 18:11:53 linuxp kernel: [143342.655933] #PF: error_code(0x0000) -
>> not-present page
>> Oct 23 18:11:53 linuxp kernel: [143342.655948] Oops: 0000 [#3] SMP PTI
>> Oct 23 18:11:53 linuxp kernel: [143342.655956] CPU: 2 PID: 6287 Comm: DOM
>> Worker Tainted: G      D   I       5.9.1 #1
>> Oct 23 18:11:53 linuxp kernel: [143342.655960] Hardware name: Notebook
>>                 W65_W67RZ/W65_W67RZ, BIOS 1.05.06 02/22/2016
>> Oct 23 18:11:53 linuxp kernel: [143342.655971] EIP: acct_collect+0x4c/0x166
>> Oct 23 18:11:53 linuxp kernel: [143342.655978] Code: 00 00 85 c9 0f 84 2c 01
>> 00
>> 00 8b 87 a4 02 00 00 83 c0 44 e8 09 8b aa 00 8b 87 a4 02 00 00 8b 00 85 c0
>> 0f
>> 84 15 01 00 00 31 d2 <2b> 10 03 50 04 8b 40 08 85 c0 75 f4 89 d7 c1 ef 0a 64
>> a1
>> dc 26 1b
>> Oct 23 18:11:53 linuxp kernel: [143342.655985] EAX: 021d2001 EBX: 0000000f
>> ECX:
>> eea698c0 EDX: 06744fff
>> Oct 23 18:11:53 linuxp kernel: [143342.655991] ESI: eed4f900 EDI: e5189700
>> EBP:
>> e551de54 ESP: e551de48
>> Oct 23 18:11:53 linuxp kernel: [143342.655998] DS: 007b ES: 007b FS: 00d8
>> GS:
>> 00e0 SS: 0068 EFLAGS: 00210202
>> Oct 23 18:11:53 linuxp kernel: [143342.656004] CR0: 80050033 CR2: 021d2001
>> CR3:
>> 250c6000 CR4: 003506f0
>> Oct 23 18:11:53 linuxp kernel: [143342.656008] DR0: 00000000 DR1: 00000000
>> DR2:
>> 00000000 DR3: 00000000
>> Oct 23 18:11:53 linuxp kernel: [143342.656012] DR6: fffe0ff0 DR7: 00000400
>> Oct 23 18:11:53 linuxp kernel: [143342.656015] Call Trace:
>> Oct 23 18:11:53 linuxp kernel: [143342.656024]  do_exit+0x168/0xa5d
>> Oct 23 18:11:53 linuxp kernel: [143342.656033]  ?
>> prepare_to_wait_event+0x5a/0xc8
>> Oct 23 18:11:53 linuxp kernel: [143342.656039]  do_group_exit+0x35/0x8a
>> Oct 23 18:11:53 linuxp kernel: [143342.656046]  get_signal+0x146/0x88b
>> Oct 23 18:11:53 linuxp kernel: [143342.656055]  arch_do_signal+0x23/0x594
>> Oct 23 18:11:53 linuxp kernel: [143342.656064]  ? vfs_read+0xe0/0x17f
>> Oct 23 18:11:53 linuxp kernel: [143342.656071]
>> exit_to_user_mode_prepare+0xd4/0x135
>> Oct 23 18:11:53 linuxp kernel: [143342.656080]
>> syscall_exit_to_user_mode+0x23/0x14d
>> Oct 23 18:11:53 linuxp kernel: [143342.656087] 
>> do_int80_syscall_32+0x36/0x39
>> Oct 23 18:11:53 linuxp kernel: [143342.656093]  entry_INT80_32+0xf7/0xf7
>> Oct 23 18:11:53 linuxp kernel: [143342.656097] EIP: 0xafc314c4
>> Oct 23 18:11:53 linuxp kernel: [143342.656103] Code: 89 38 85 f6 78 73 8d 75
>> a7
>> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 8b 7d e8 89 f1 ba 01 00 00 00 b8 03
>> 00
>> 00 00 53 89 fb cd 80 <5b> 3d 01 f0 ff ff 72 10 89 c7 f7 df e8 eb ad 3d fd 83
>> ff
>> 04 89 38
>> Oct 23 18:11:53 linuxp kernel: [143342.656107] EAX: fffffe00 EBX: 00000007
>> ECX:
>> 90dfdd9f EDX: 00000001
>> Oct 23 18:11:53 linuxp kernel: [143342.656111] ESI: 90dfdd9f EDI: 00000007
>> EBP:
>> 90dfddf8 ESP: 90dfdd7c
>> Oct 23 18:11:53 linuxp kernel: [143342.656115] DS: 007b ES: 007b FS: 0000
>> GS:
>> 0033 SS: 007b EFLAGS: 00200206
>> Oct 23 18:11:53 linuxp kernel: [143342.656119] Modules linked in: appletalk
>> psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc videobuf2_memops btusb
>> videobuf2_v4l2 hid_generic btrtl btbcm videobuf2_common btintel videodev
>> bluetooth mc usbhid hid ecdh_generic ecc rtsx_pci_sdmmc joydev mmc_core
>> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i2c_dev
>> ledtrig_audio coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit
>> x86_pkg_temp_thermal mac80211 drm_kms_helper intel_powerclamp rtsx_pci
>> realtek
>> drm kvm_intel mdio_devres mfd_core libphy kvm intel_gtt irqbypass
>> crc32_pclmul
>> iwlwifi snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw
>> fb_sys_fops
>> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea wmi
>> thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer xhci_pci
>> i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me soundcore
>> video
>> mei i2c_core acpi_pad ac loop
>> Oct 23 18:11:53 linuxp kernel: [143342.656223] CR2: 00000000021d2001
>> Oct 23 18:11:53 linuxp kernel: [143342.656230] ---[ end trace
>> c79bfd2669dd9a28
>> ]---
>> Oct 23 18:11:53 linuxp kernel: [143342.656238] EIP: m_next+0x1c/0x44
>> Oct 23 18:11:53 linuxp kernel: [143342.656243] Code: 24 08 d4 e6 c1 e8 1a 77
>> e2
>> ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 0c 39 da 74
>> 24
>> 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 5f 5d c3 be ff ff ff
>> ff
>> 31 ff 85
>> Oct 23 18:11:53 linuxp kernel: [143342.656248] EAX: 021d2001 EBX: 00000000
>> ECX:
>> eeb9e56c EDX: eca0f000
>> Oct 23 18:11:53 linuxp kernel: [143342.656252] ESI: 00000000 EDI: c128cad0
>> EBP:
>> e59bff0c ESP: e59bff00
>> Oct 23 18:11:53 linuxp kernel: [143342.656258] DS: 007b ES: 007b FS: 00d8
>> GS:
>> 00e0 SS: 0068 EFLAGS: 00010202
>> Oct 23 18:11:53 linuxp kernel: [143342.656262] CR0: 80050033 CR2: 021d2001
>> CR3:
>> 250c6000 CR4: 003506f0
>> Oct 23 18:11:53 linuxp kernel: [143342.656266] DR0: 00000000 DR1: 00000000
>> DR2:
>> 00000000 DR3: 00000000
>> Oct 23 18:11:53 linuxp kernel: [143342.656270] DR6: fffe0ff0 DR7: 00000400
>> Oct 23 18:11:53 linuxp kernel: [143342.656274] Fixing recursive fault but
>> reboot is needed!
>>
>> -- 
>> You are receiving this mail because:
>> You are the assignee for the bug.

On 11/4/20 1:17 AM, Andrew Morton wrote:
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
> 
> 
> On Tue, 03 Nov 2020 20:00:58 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:
> 
>> https://bugzilla.kernel.org/show_bug.cgi?id=210031
>> 
>>             Bug ID: 210031
>>            Summary: unable to handle page fault for address - EIP:
>>                     khugepaged
>>            Product: Memory Management
>>            Version: 2.5
>>     Kernel Version: 5.9.1
>>           Hardware: All
>>                 OS: Linux
>>               Tree: Mainline
>>             Status: NEW
>>           Severity: normal
>>           Priority: P1
>>          Component: Other
>>           Assignee: akpm@linux-foundation.org
>>           Reporter: newsmails@netcourrier.com
>>         Regression: No
> 
> Thanks.  That's a strange looking trace.  I'll optimistically cc some
> people who have been working in that area lately.
> 
> What caused this kernel to be tainted?
> 
> 
>> laptop Skylake i915 
>> Distribution : slackware 14.2 32 bits
>> 
>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle page
>> fault
>> for address: 021d202d
>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read access
>> in
>> kernel mode
>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) -
>> not-present page
>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI

#2 means this is not the first oops. Do you have the very first?

On 11/4/20 1:14 PM, Vlastimil Babka wrote:
> On 11/4/20 1:17 AM, Andrew Morton wrote:
>> (switched to email.  Please respond via emailed reply-to-all, not via 
>> the
>> bugzilla web interface).
>>
>>
>> On Tue, 03 Nov 2020 20:00:58 +0000 
>> bugzilla-daemon@bugzilla.kernel.org wrote:
>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=210031
>>>
>>>             Bug ID: 210031
>>>            Summary: unable to handle page fault for address - EIP:
>>>                     khugepaged
>>>            Product: Memory Management
>>>            Version: 2.5
>>>     Kernel Version: 5.9.1
>>>           Hardware: All
>>>                 OS: Linux
>>>               Tree: Mainline
>>>             Status: NEW
>>>           Severity: normal
>>>           Priority: P1
>>>          Component: Other
>>>           Assignee: akpm@linux-foundation.org
>>>           Reporter: newsmails@netcourrier.com
>>>         Regression: No
>>
>> Thanks.  That's a strange looking trace.  I'll optimistically cc some
>> people who have been working in that area lately.
>>
>> What caused this kernel to be tainted?
>>
>>
>>> laptop Skylake i915 Distribution : slackware 14.2 32 bits
>>>
>>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle 
>>> page fault
>>> for address: 021d202d
>>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read 
>>> access in
>>> kernel mode
>>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: 
>>> error_code(0x0000) -
>>> not-present page
>>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
>
> #2 means this is not the first oops. Do you have the very first?
>
Yes sorry.
It was a resume too as you will see with the time.
For oct 23 17:38 it is a resume too i think : i think that I hibernated 
and i forgot to look at something so i resumed.

Oct 23 13:22:10 linuxp dhcpcd[18199]: dhcpcd not running
Oct 23 15:55:49 linuxp dhcpcd[27045]: dhcpcd not running
Oct 23 15:55:49 linuxp dhcpcd[27053]: dhcpcd not running
Oct 23 15:55:50 linuxp dhcpcd[27061]: dhcpcd not running
Oct 23 15:55:50 linuxp dhcpcd[27067]: dhcpcd not running
Oct 23 17:31:13 linuxp kernel: [140897.356150] iwlwifi 0000:03:00.0: 
RF_KILL bit toggled to enable radio.
Oct 23 17:31:16 linuxp kernel: [140900.724013] Bluetooth: hci0: 
unexpected event for opcode 0xfc2f
Oct 23 17:31:39 linuxp kernel: [140928.245135] BUG: unable to handle 
page fault for address: 021d2001
Oct 23 17:31:39 linuxp kernel: [140928.245147] #PF: supervisor read 
access in kernel mode
Oct 23 17:31:39 linuxp kernel: [140928.245152] #PF: error_code(0x0000) - 
not-present page
Oct 23 17:31:39 linuxp kernel: [140928.245169] Oops: 0000 [#1] SMP PTI
Oct 23 17:31:39 linuxp kernel: [140928.245179] CPU: 1 PID: 2302 Comm: 
Breakpad Server Tainted: G          I       5.9.1 #1
Oct 23 17:31:39 linuxp kernel: [140928.245184] Hardware name: 
Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06 
02/22/2016
Oct 23 17:31:39 linuxp kernel: [140928.245197] EIP: m_next+0x1c/0x44
Oct 23 17:31:39 linuxp kernel: [140928.245205] Code: 24 08 d4 e6 c1 e8 
1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 
0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 
5f 5d c3 be ff ff ff ff 31 ff 85
Oct 23 17:31:39 linuxp kernel: [140928.245212] EAX: 021d2001 EBX: 
00000000 ECX: eeb9e56c EDX: eca0f000
Oct 23 17:31:39 linuxp kernel: [140928.245216] ESI: 00000000 EDI: 
c128cad0 EBP: e59bff0c ESP: e59bff00
Oct 23 17:31:39 linuxp kernel: [140928.245221] DS: 007b ES: 007b FS: 
00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
Oct 23 17:31:39 linuxp kernel: [140928.245224] CR0: 80050033 CR2: 
021d2001 CR3: 2606c000 CR4: 003506f0
Oct 23 17:31:39 linuxp kernel: [140928.245228] DR0: 00000000 DR1: 
00000000 DR2: 00000000 DR3: 00000000
Oct 23 17:31:39 linuxp kernel: [140928.245231] DR6: fffe0ff0 DR7: 00000400
Oct 23 17:31:39 linuxp kernel: [140928.245233] Call Trace:
Oct 23 17:31:39 linuxp kernel: [140928.245242]  ? 
quota_send_warning+0x220/0x220
Oct 23 17:31:39 linuxp kernel: [140928.245248]  seq_read+0x2bc/0x3e1
Oct 23 17:31:39 linuxp kernel: [140928.245254]  ? 
quota_send_warning+0x220/0x220
Oct 23 17:31:39 linuxp kernel: [140928.245260]  ? seq_open_private+0x17/0x17
Oct 23 17:31:39 linuxp kernel: [140928.245266]  vfs_read+0x85/0x17f
Oct 23 17:31:39 linuxp kernel: [140928.245272]  ? mutex_lock+0x10/0x33
Oct 23 17:31:39 linuxp kernel: [140928.245277]  ksys_read+0x51/0xb6
Oct 23 17:31:39 linuxp kernel: [140928.245283] __ia32_sys_read+0x15/0x17
Oct 23 17:31:39 linuxp kernel: [140928.245289] do_int80_syscall_32+0x2c/0x39
Oct 23 17:31:39 linuxp kernel: [140928.245295] entry_INT80_32+0xf7/0xf7
Oct 23 17:31:39 linuxp kernel: [140928.245299] EIP: 0xafc787c8
Oct 23 17:31:39 linuxp kernel: [140928.245304] Code: 00 00 c6 47 04 01 
8b 47 08 85 c0 75 b6 80 7f 04 00 75 5c 8b 37 ba 00 04 00 00 8d 4c 07 0c 
29 c2 b8 03 00 00 00 53 89 f3 cd 80 <5b> 89 c6 3d 01 f0 ff ff 73 32 85 
f6 78 37 74 c8 01 77 08 8b 47 08
Oct 23 17:31:39 linuxp kernel: [140928.245308] EAX: ffffffda EBX: 
00000040 ECX: a3c194fc EDX: 000003d8
Oct 23 17:31:39 linuxp kernel: [140928.245311] ESI: 00000040 EDI: 
a3c194c8 EBP: 995fece8 ESP: 995feccc
Oct 23 17:31:39 linuxp kernel: [140928.245316] DS: 007b ES: 007b FS: 
0000 GS: 0033 SS: 007b EFLAGS: 00000216
Oct 23 17:31:39 linuxp kernel: [140928.245320] Modules linked in: 
appletalk psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc 
videobuf2_memops btusb videobuf2_v4l2 hid_generic btrtl btbcm 
videobuf2_common btintel videodev bluetooth mc usbhid hid ecdh_generic 
ecc rtsx_pci_sdmmc joydev mmc_core snd_hda_codec_hdmi 
snd_hda_codec_realtek snd_hda_codec_generic i2c_dev ledtrig_audio 
coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit x86_pkg_temp_thermal 
mac80211 drm_kms_helper intel_powerclamp rtsx_pci realtek drm kvm_intel 
mdio_devres mfd_core libphy kvm intel_gtt irqbypass crc32_pclmul iwlwifi 
snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw fb_sys_fops 
cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea 
wmi thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer 
xhci_pci i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me 
soundcore video mei i2c_core acpi_pad ac loop
Oct 23 17:31:39 linuxp kernel: [140928.245396] CR2: 00000000021d2001
Oct 23 17:31:39 linuxp kernel: [140928.245402] ---[ end trace 
c79bfd2669dd9a26 ]---
Oct 23 17:31:39 linuxp kernel: [140928.245408] EIP: m_next+0x1c/0x44
Oct 23 17:31:39 linuxp kernel: [140928.245412] Code: 24 08 d4 e6 c1 e8 
1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58 
0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e 
5f 5d c3 be ff ff ff ff 31 ff 85
Oct 23 17:31:39 linuxp kernel: [140928.245417] EAX: 021d2001 EBX: 
00000000 ECX: eeb9e56c EDX: eca0f000
Oct 23 17:31:39 linuxp kernel: [140928.245420] ESI: 00000000 EDI: 
c128cad0 EBP: e59bff0c ESP: e59bff00
Oct 23 17:31:39 linuxp kernel: [140928.245424] DS: 007b ES: 007b FS: 
00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
Oct 23 17:31:39 linuxp kernel: [140928.245427] CR0: 80050033 CR2: 
021d2001 CR3: 2606c000 CR4: 003506f0
Oct 23 17:31:39 linuxp kernel: [140928.245431] DR0: 00000000 DR1: 
00000000 DR2: 00000000 DR3: 00000000
Oct 23 17:31:39 linuxp kernel: [140928.245434] DR6: fffe0ff0 DR7: 00000400
Oct 23 17:32:27 linuxp dhcpcd[27294]: dhcpcd not running
Oct 23 17:32:30 linuxp dhcpcd[27305]: dhcpcd not running
Oct 23 17:32:33 linuxp dhcpcd[27314]: dhcpcd not running
Oct 23 17:32:35 linuxp dhcpcd[27325]: dhcpcd not running
Oct 23 17:32:36 linuxp dhcpcd[27331]: dhcpcd not running
Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle 
page fault for address: 021d202d
Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read 
access in kernel mode
Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) - 
not-present page
Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
Oct 23 17:38:22 linuxp kernel: [141330.499274] CPU: 0 PID: 37 Comm: 
khugepaged Tainted: G      D   I       5.9.1 #1
Oct 23 17:38:22 linuxp kernel: [141330.499278] Hardware name: 
Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06 
02/22/2016
Oct 23 17:38:22 linuxp kernel: [141330.499289] EIP: khugepaged+0x599/0x2226

On 11/4/20 1:23 PM, Newsmails wrote:
> 
> 
> On 11/4/20 1:14 PM, Vlastimil Babka wrote:
>> On 11/4/20 1:17 AM, Andrew Morton wrote:
>>> (switched to email.  Please respond via emailed reply-to-all, not via 
>>> the
>>> bugzilla web interface).
>>>
>>>
>>> On Tue, 03 Nov 2020 20:00:58 +0000 
>>> bugzilla-daemon@bugzilla.kernel.org wrote:
>>>
>>>> https://bugzilla.kernel.org/show_bug.cgi?id=210031
>>>>
>>>>             Bug ID: 210031
>>>>            Summary: unable to handle page fault for address - EIP:
>>>>                     khugepaged
>>>>            Product: Memory Management
>>>>            Version: 2.5
>>>>     Kernel Version: 5.9.1
>>>>           Hardware: All
>>>>                 OS: Linux
>>>>               Tree: Mainline
>>>>             Status: NEW
>>>>           Severity: normal
>>>>           Priority: P1
>>>>          Component: Other
>>>>           Assignee: akpm@linux-foundation.org
>>>>           Reporter: newsmails@netcourrier.com
>>>>         Regression: No
>>>
>>> Thanks.  That's a strange looking trace.  I'll optimistically cc some
>>> people who have been working in that area lately.
>>>
>>> What caused this kernel to be tainted?
>>>
>>>
>>>> laptop Skylake i915 Distribution : slackware 14.2 32 bits
>>>>
>>>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle 
>>>> page fault
>>>> for address: 021d202d
>>>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read 
>>>> access in
>>>> kernel mode
>>>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: 
>>>> error_code(0x0000) -
>>>> not-present page
>>>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
>>
>> #2 means this is not the first oops. Do you have the very first?
>>
> Yes sorry.
> It was a resume too as you will see with the time.
> For oct 23 17:38 it is a resume too i think : i think that I hibernated
> and i forgot to look at something so i resumed.

It's always 021d202d (3 times) and always where a vma might be accessed (a /proc 
file, khugepaged(), acct_collect()) so I would assume a struct vma was corrupted 
in the hibernate/resume process.
Could be also firmware related AFAIK and there's I taint flag which means some 
buggy firmware workaround is in effect.

> Oct 23 13:22:10 linuxp dhcpcd[18199]: dhcpcd not running
> Oct 23 15:55:49 linuxp dhcpcd[27045]: dhcpcd not running
> Oct 23 15:55:49 linuxp dhcpcd[27053]: dhcpcd not running
> Oct 23 15:55:50 linuxp dhcpcd[27061]: dhcpcd not running
> Oct 23 15:55:50 linuxp dhcpcd[27067]: dhcpcd not running
> Oct 23 17:31:13 linuxp kernel: [140897.356150] iwlwifi 0000:03:00.0:
> RF_KILL bit toggled to enable radio.
> Oct 23 17:31:16 linuxp kernel: [140900.724013] Bluetooth: hci0:
> unexpected event for opcode 0xfc2f
> Oct 23 17:31:39 linuxp kernel: [140928.245135] BUG: unable to handle
> page fault for address: 021d2001
> Oct 23 17:31:39 linuxp kernel: [140928.245147] #PF: supervisor read
> access in kernel mode
> Oct 23 17:31:39 linuxp kernel: [140928.245152] #PF: error_code(0x0000) -
> not-present page
> Oct 23 17:31:39 linuxp kernel: [140928.245169] Oops: 0000 [#1] SMP PTI
> Oct 23 17:31:39 linuxp kernel: [140928.245179] CPU: 1 PID: 2302 Comm:
> Breakpad Server Tainted: G          I       5.9.1 #1
> Oct 23 17:31:39 linuxp kernel: [140928.245184] Hardware name:
> Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06
> 02/22/2016
> Oct 23 17:31:39 linuxp kernel: [140928.245197] EIP: m_next+0x1c/0x44
> Oct 23 17:31:39 linuxp kernel: [140928.245205] Code: 24 08 d4 e6 c1 e8
> 1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58
> 0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e
> 5f 5d c3 be ff ff ff ff 31 ff 85
> Oct 23 17:31:39 linuxp kernel: [140928.245212] EAX: 021d2001 EBX:
> 00000000 ECX: eeb9e56c EDX: eca0f000
> Oct 23 17:31:39 linuxp kernel: [140928.245216] ESI: 00000000 EDI:
> c128cad0 EBP: e59bff0c ESP: e59bff00
> Oct 23 17:31:39 linuxp kernel: [140928.245221] DS: 007b ES: 007b FS:
> 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
> Oct 23 17:31:39 linuxp kernel: [140928.245224] CR0: 80050033 CR2:
> 021d2001 CR3: 2606c000 CR4: 003506f0
> Oct 23 17:31:39 linuxp kernel: [140928.245228] DR0: 00000000 DR1:
> 00000000 DR2: 00000000 DR3: 00000000
> Oct 23 17:31:39 linuxp kernel: [140928.245231] DR6: fffe0ff0 DR7: 00000400
> Oct 23 17:31:39 linuxp kernel: [140928.245233] Call Trace:
> Oct 23 17:31:39 linuxp kernel: [140928.245242]  ?
> quota_send_warning+0x220/0x220
> Oct 23 17:31:39 linuxp kernel: [140928.245248]  seq_read+0x2bc/0x3e1
> Oct 23 17:31:39 linuxp kernel: [140928.245254]  ?
> quota_send_warning+0x220/0x220
> Oct 23 17:31:39 linuxp kernel: [140928.245260]  ? seq_open_private+0x17/0x17
> Oct 23 17:31:39 linuxp kernel: [140928.245266]  vfs_read+0x85/0x17f
> Oct 23 17:31:39 linuxp kernel: [140928.245272]  ? mutex_lock+0x10/0x33
> Oct 23 17:31:39 linuxp kernel: [140928.245277]  ksys_read+0x51/0xb6
> Oct 23 17:31:39 linuxp kernel: [140928.245283] __ia32_sys_read+0x15/0x17
> Oct 23 17:31:39 linuxp kernel: [140928.245289] do_int80_syscall_32+0x2c/0x39
> Oct 23 17:31:39 linuxp kernel: [140928.245295] entry_INT80_32+0xf7/0xf7
> Oct 23 17:31:39 linuxp kernel: [140928.245299] EIP: 0xafc787c8
> Oct 23 17:31:39 linuxp kernel: [140928.245304] Code: 00 00 c6 47 04 01
> 8b 47 08 85 c0 75 b6 80 7f 04 00 75 5c 8b 37 ba 00 04 00 00 8d 4c 07 0c
> 29 c2 b8 03 00 00 00 53 89 f3 cd 80 <5b> 89 c6 3d 01 f0 ff ff 73 32 85
> f6 78 37 74 c8 01 77 08 8b 47 08
> Oct 23 17:31:39 linuxp kernel: [140928.245308] EAX: ffffffda EBX:
> 00000040 ECX: a3c194fc EDX: 000003d8
> Oct 23 17:31:39 linuxp kernel: [140928.245311] ESI: 00000040 EDI:
> a3c194c8 EBP: 995fece8 ESP: 995feccc
> Oct 23 17:31:39 linuxp kernel: [140928.245316] DS: 007b ES: 007b FS:
> 0000 GS: 0033 SS: 007b EFLAGS: 00000216
> Oct 23 17:31:39 linuxp kernel: [140928.245320] Modules linked in:
> appletalk psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc
> videobuf2_memops btusb videobuf2_v4l2 hid_generic btrtl btbcm
> videobuf2_common btintel videodev bluetooth mc usbhid hid ecdh_generic
> ecc rtsx_pci_sdmmc joydev mmc_core snd_hda_codec_hdmi
> snd_hda_codec_realtek snd_hda_codec_generic i2c_dev ledtrig_audio
> coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit x86_pkg_temp_thermal
> mac80211 drm_kms_helper intel_powerclamp rtsx_pci realtek drm kvm_intel
> mdio_devres mfd_core libphy kvm intel_gtt irqbypass crc32_pclmul iwlwifi
> snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw fb_sys_fops
> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea
> wmi thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer
> xhci_pci i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me
> soundcore video mei i2c_core acpi_pad ac loop
> Oct 23 17:31:39 linuxp kernel: [140928.245396] CR2: 00000000021d2001
> Oct 23 17:31:39 linuxp kernel: [140928.245402] ---[ end trace
> c79bfd2669dd9a26 ]---
> Oct 23 17:31:39 linuxp kernel: [140928.245408] EIP: m_next+0x1c/0x44
> Oct 23 17:31:39 linuxp kernel: [140928.245412] Code: 24 08 d4 e6 c1 e8
> 1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58
> 0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e
> 5f 5d c3 be ff ff ff ff 31 ff 85
> Oct 23 17:31:39 linuxp kernel: [140928.245417] EAX: 021d2001 EBX:
> 00000000 ECX: eeb9e56c EDX: eca0f000
> Oct 23 17:31:39 linuxp kernel: [140928.245420] ESI: 00000000 EDI:
> c128cad0 EBP: e59bff0c ESP: e59bff00
> Oct 23 17:31:39 linuxp kernel: [140928.245424] DS: 007b ES: 007b FS:
> 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
> Oct 23 17:31:39 linuxp kernel: [140928.245427] CR0: 80050033 CR2:
> 021d2001 CR3: 2606c000 CR4: 003506f0
> Oct 23 17:31:39 linuxp kernel: [140928.245431] DR0: 00000000 DR1:
> 00000000 DR2: 00000000 DR3: 00000000
> Oct 23 17:31:39 linuxp kernel: [140928.245434] DR6: fffe0ff0 DR7: 00000400
> Oct 23 17:32:27 linuxp dhcpcd[27294]: dhcpcd not running
> Oct 23 17:32:30 linuxp dhcpcd[27305]: dhcpcd not running
> Oct 23 17:32:33 linuxp dhcpcd[27314]: dhcpcd not running
> Oct 23 17:32:35 linuxp dhcpcd[27325]: dhcpcd not running
> Oct 23 17:32:36 linuxp dhcpcd[27331]: dhcpcd not running
> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle
> page fault for address: 021d202d
> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read
> access in kernel mode
> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) -
> not-present page
> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
> Oct 23 17:38:22 linuxp kernel: [141330.499274] CPU: 0 PID: 37 Comm:
> khugepaged Tainted: G      D   I       5.9.1 #1
> Oct 23 17:38:22 linuxp kernel: [141330.499278] Hardware name:
> Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06
> 02/22/2016
> Oct 23 17:38:22 linuxp kernel: [141330.499289] EIP: khugepaged+0x599/0x2226
> 
> 
>

On 11/4/20 1:45 PM, Vlastimil Babka wrote:
> On 11/4/20 1:23 PM, Newsmails wrote:
>>
>>
>> On 11/4/20 1:14 PM, Vlastimil Babka wrote:
>>> On 11/4/20 1:17 AM, Andrew Morton wrote:
>>>> (switched to email.  Please respond via emailed reply-to-all, not 
>>>> via the
>>>> bugzilla web interface).
>>>>
>>>>
>>>> On Tue, 03 Nov 2020 20:00:58 +0000 
>>>> bugzilla-daemon@bugzilla.kernel.org wrote:
>>>>
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=210031
>>>>>
>>>>>             Bug ID: 210031
>>>>>            Summary: unable to handle page fault for address - EIP:
>>>>>                     khugepaged
>>>>>            Product: Memory Management
>>>>>            Version: 2.5
>>>>>     Kernel Version: 5.9.1
>>>>>           Hardware: All
>>>>>                 OS: Linux
>>>>>               Tree: Mainline
>>>>>             Status: NEW
>>>>>           Severity: normal
>>>>>           Priority: P1
>>>>>          Component: Other
>>>>>           Assignee: akpm@linux-foundation.org
>>>>>           Reporter: newsmails@netcourrier.com
>>>>>         Regression: No
>>>>
>>>> Thanks.  That's a strange looking trace.  I'll optimistically cc some
>>>> people who have been working in that area lately.
>>>>
>>>> What caused this kernel to be tainted?
>>>>
>>>>
>>>>> laptop Skylake i915 Distribution : slackware 14.2 32 bits
>>>>>
>>>>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to 
>>>>> handle page fault
>>>>> for address: 021d202d
>>>>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor 
>>>>> read access in
>>>>> kernel mode
>>>>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: 
>>>>> error_code(0x0000) -
>>>>> not-present page
>>>>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP 
>>>>> PTI
>>>
>>> #2 means this is not the first oops. Do you have the very first?
>>>
>> Yes sorry.
>> It was a resume too as you will see with the time.
>> For oct 23 17:38 it is a resume too i think : i think that I hibernated
>> and i forgot to look at something so i resumed.
>
> It's always 021d202d (3 times) and always where a vma might be 
> accessed (a /proc file, khugepaged(), acct_collect()) so I would 
> assume a struct vma was corrupted in the hibernate/resume process.
> Could be also firmware related AFAIK and there's I taint flag which 
> means some buggy firmware workaround is in effect.
It seem's that you are right concerning the buggy firmware. Here are 
lines at start in syslog :
[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update 
microcode to version: 0xb2 (or later)
MDS CPU bug present and SMT on, data leak possible.
TAA CPU bug present and SMT on, data leak possible.

>
>> Oct 23 13:22:10 linuxp dhcpcd[18199]: dhcpcd not running
>> Oct 23 15:55:49 linuxp dhcpcd[27045]: dhcpcd not running
>> Oct 23 15:55:49 linuxp dhcpcd[27053]: dhcpcd not running
>> Oct 23 15:55:50 linuxp dhcpcd[27061]: dhcpcd not running
>> Oct 23 15:55:50 linuxp dhcpcd[27067]: dhcpcd not running
>> Oct 23 17:31:13 linuxp kernel: [140897.356150] iwlwifi 0000:03:00.0:
>> RF_KILL bit toggled to enable radio.
>> Oct 23 17:31:16 linuxp kernel: [140900.724013] Bluetooth: hci0:
>> unexpected event for opcode 0xfc2f
>> Oct 23 17:31:39 linuxp kernel: [140928.245135] BUG: unable to handle
>> page fault for address: 021d2001
>> Oct 23 17:31:39 linuxp kernel: [140928.245147] #PF: supervisor read
>> access in kernel mode
>> Oct 23 17:31:39 linuxp kernel: [140928.245152] #PF: error_code(0x0000) -
>> not-present page
>> Oct 23 17:31:39 linuxp kernel: [140928.245169] Oops: 0000 [#1] SMP PTI
>> Oct 23 17:31:39 linuxp kernel: [140928.245179] CPU: 1 PID: 2302 Comm:
>> Breakpad Server Tainted: G          I       5.9.1 #1
>> Oct 23 17:31:39 linuxp kernel: [140928.245184] Hardware name:
>> Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06
>> 02/22/2016
>> Oct 23 17:31:39 linuxp kernel: [140928.245197] EIP: m_next+0x1c/0x44
>> Oct 23 17:31:39 linuxp kernel: [140928.245205] Code: 24 08 d4 e6 c1 e8
>> 1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58
>> 0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e
>> 5f 5d c3 be ff ff ff ff 31 ff 85
>> Oct 23 17:31:39 linuxp kernel: [140928.245212] EAX: 021d2001 EBX:
>> 00000000 ECX: eeb9e56c EDX: eca0f000
>> Oct 23 17:31:39 linuxp kernel: [140928.245216] ESI: 00000000 EDI:
>> c128cad0 EBP: e59bff0c ESP: e59bff00
>> Oct 23 17:31:39 linuxp kernel: [140928.245221] DS: 007b ES: 007b FS:
>> 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
>> Oct 23 17:31:39 linuxp kernel: [140928.245224] CR0: 80050033 CR2:
>> 021d2001 CR3: 2606c000 CR4: 003506f0
>> Oct 23 17:31:39 linuxp kernel: [140928.245228] DR0: 00000000 DR1:
>> 00000000 DR2: 00000000 DR3: 00000000
>> Oct 23 17:31:39 linuxp kernel: [140928.245231] DR6: fffe0ff0 DR7: 
>> 00000400
>> Oct 23 17:31:39 linuxp kernel: [140928.245233] Call Trace:
>> Oct 23 17:31:39 linuxp kernel: [140928.245242]  ?
>> quota_send_warning+0x220/0x220
>> Oct 23 17:31:39 linuxp kernel: [140928.245248] seq_read+0x2bc/0x3e1
>> Oct 23 17:31:39 linuxp kernel: [140928.245254]  ?
>> quota_send_warning+0x220/0x220
>> Oct 23 17:31:39 linuxp kernel: [140928.245260]  ? 
>> seq_open_private+0x17/0x17
>> Oct 23 17:31:39 linuxp kernel: [140928.245266] vfs_read+0x85/0x17f
>> Oct 23 17:31:39 linuxp kernel: [140928.245272]  ? mutex_lock+0x10/0x33
>> Oct 23 17:31:39 linuxp kernel: [140928.245277] ksys_read+0x51/0xb6
>> Oct 23 17:31:39 linuxp kernel: [140928.245283] __ia32_sys_read+0x15/0x17
>> Oct 23 17:31:39 linuxp kernel: [140928.245289] 
>> do_int80_syscall_32+0x2c/0x39
>> Oct 23 17:31:39 linuxp kernel: [140928.245295] entry_INT80_32+0xf7/0xf7
>> Oct 23 17:31:39 linuxp kernel: [140928.245299] EIP: 0xafc787c8
>> Oct 23 17:31:39 linuxp kernel: [140928.245304] Code: 00 00 c6 47 04 01
>> 8b 47 08 85 c0 75 b6 80 7f 04 00 75 5c 8b 37 ba 00 04 00 00 8d 4c 07 0c
>> 29 c2 b8 03 00 00 00 53 89 f3 cd 80 <5b> 89 c6 3d 01 f0 ff ff 73 32 85
>> f6 78 37 74 c8 01 77 08 8b 47 08
>> Oct 23 17:31:39 linuxp kernel: [140928.245308] EAX: ffffffda EBX:
>> 00000040 ECX: a3c194fc EDX: 000003d8
>> Oct 23 17:31:39 linuxp kernel: [140928.245311] ESI: 00000040 EDI:
>> a3c194c8 EBP: 995fece8 ESP: 995feccc
>> Oct 23 17:31:39 linuxp kernel: [140928.245316] DS: 007b ES: 007b FS:
>> 0000 GS: 0033 SS: 007b EFLAGS: 00000216
>> Oct 23 17:31:39 linuxp kernel: [140928.245320] Modules linked in:
>> appletalk psnap llc ipv6 fuse uvcvideo videobuf2_vmalloc
>> videobuf2_memops btusb videobuf2_v4l2 hid_generic btrtl btbcm
>> videobuf2_common btintel videodev bluetooth mc usbhid hid ecdh_generic
>> ecc rtsx_pci_sdmmc joydev mmc_core snd_hda_codec_hdmi
>> snd_hda_codec_realtek snd_hda_codec_generic i2c_dev ledtrig_audio
>> coretemp i915 hwmon iwlmvm r8169 i2c_algo_bit x86_pkg_temp_thermal
>> mac80211 drm_kms_helper intel_powerclamp rtsx_pci realtek drm kvm_intel
>> mdio_devres mfd_core libphy kvm intel_gtt irqbypass crc32_pclmul iwlwifi
>> snd_hda_intel agpgart psmouse evdev crc32c_intel serio_raw fb_sys_fops
>> cfg80211 snd_intel_dspcfg snd_hda_codec rfkill snd_hda_core syscopyarea
>> wmi thermal snd_hwdep battery snd_pcm sysfillrect sysimgblt snd_timer
>> xhci_pci i2c_i801 button xhci_hcd snd i2c_smbus intel_pch_thermal mei_me
>> soundcore video mei i2c_core acpi_pad ac loop
>> Oct 23 17:31:39 linuxp kernel: [140928.245396] CR2: 00000000021d2001
>> Oct 23 17:31:39 linuxp kernel: [140928.245402] ---[ end trace
>> c79bfd2669dd9a26 ]---
>> Oct 23 17:31:39 linuxp kernel: [140928.245408] EIP: m_next+0x1c/0x44
>> Oct 23 17:31:39 linuxp kernel: [140928.245412] Code: 24 08 d4 e6 c1 e8
>> 1a 77 e2 ff eb d6 cc cc 3e 8d 74 26 00 55 89 e5 57 56 53 8b 40 44 8b 58
>> 0c 39 da 74 24 8b 42 08 85 c0 74 0e <8b> 30 31 ff 89 31 89 79 04 5b 5e
>> 5f 5d c3 be ff ff ff ff 31 ff 85
>> Oct 23 17:31:39 linuxp kernel: [140928.245417] EAX: 021d2001 EBX:
>> 00000000 ECX: eeb9e56c EDX: eca0f000
>> Oct 23 17:31:39 linuxp kernel: [140928.245420] ESI: 00000000 EDI:
>> c128cad0 EBP: e59bff0c ESP: e59bff00
>> Oct 23 17:31:39 linuxp kernel: [140928.245424] DS: 007b ES: 007b FS:
>> 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202
>> Oct 23 17:31:39 linuxp kernel: [140928.245427] CR0: 80050033 CR2:
>> 021d2001 CR3: 2606c000 CR4: 003506f0
>> Oct 23 17:31:39 linuxp kernel: [140928.245431] DR0: 00000000 DR1:
>> 00000000 DR2: 00000000 DR3: 00000000
>> Oct 23 17:31:39 linuxp kernel: [140928.245434] DR6: fffe0ff0 DR7: 
>> 00000400
>> Oct 23 17:32:27 linuxp dhcpcd[27294]: dhcpcd not running
>> Oct 23 17:32:30 linuxp dhcpcd[27305]: dhcpcd not running
>> Oct 23 17:32:33 linuxp dhcpcd[27314]: dhcpcd not running
>> Oct 23 17:32:35 linuxp dhcpcd[27325]: dhcpcd not running
>> Oct 23 17:32:36 linuxp dhcpcd[27331]: dhcpcd not running
>> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle
>> page fault for address: 021d202d
>> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read
>> access in kernel mode
>> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) -
>> not-present page
>> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI
>> Oct 23 17:38:22 linuxp kernel: [141330.499274] CPU: 0 PID: 37 Comm:
>> khugepaged Tainted: G      D   I       5.9.1 #1
>> Oct 23 17:38:22 linuxp kernel: [141330.499278] Hardware name:
>> Notebook                         W65_W67RZ/W65_W67RZ, BIOS 1.05.06
>> 02/22/2016
>> Oct 23 17:38:22 linuxp kernel: [141330.499289] EIP: 
>> khugepaged+0x599/0x2226
>>
>>
>>
>