6.1.21-1-lts crash/hang while typing

General system Kernel & Hardware
1

I was just using the desktop (typing into emacs, reading web sites in browser tabs, reading e-mail on Thunderbird) when suddenly the system froze. After rebooting, I found the below extract near the end of the syslog from the boot that crashed (the actual machine name has been replaced with “mylaptop”).

Regards
– Bhaskar

12:53:04 mylaptop kernel: ------------[ cut here ]------------
Mar 26 12:53:04 mylaptop kernel: kernel BUG at mm/shmem.c:772!
Mar 26 12:53:04 mylaptop kernel: invalid opcode: 0000 [#4] PREEMPT SMP NOPTI
Mar 26 12:53:04 mylaptop kernel: CPU: 0 PID: 86 Comm: kswapd0 Tainted: G D W 6.1.21-1-lts #1 08d2e5ece03136efa7c6aeea9a9c40916b1bd8da
Mar 26 12:53:04 mylaptop kernel: Hardware name: System76 Darter Pro/Darter Pro, BIOS 1.07.07-1 06/24/2019
Mar 26 12:53:04 mylaptop kernel: RIP: 0010:shmem_writepage+0x40e/0x430
Mar 26 12:53:04 mylaptop kernel: Code: 89 35 66 21 c5 01 e9 da fc ff ff 48 c7 04 24 01 00 00 00 bd ff ff ff ff e9 3d fd ff ff 48 89 df e8 97 8e fe ff e9 e1 fd ff ff <0f> 0b 0f 0b e9 04 fd ff ff 0f 0b 41 be fe ff ff ff e9 88 fd ff ff
Mar 26 12:53:04 mylaptop kernel: RSP: 0018:ffffb190804d3848 EFLAGS: 00010282
Mar 26 12:53:04 mylaptop kernel: RAX: 0000000000000000 RBX: fffff1a5ca0459c0 RCX: ffff974440600000
Mar 26 12:53:04 mylaptop kernel: RDX: 0000000000000009 RSI: 0000000000000000 RDI: ffff9742b57bdde8
Mar 26 12:53:04 mylaptop kernel: RBP: 00000000ffffffff R08: 00000000000392d0 R09: 0000000000000017
Mar 26 12:53:04 mylaptop kernel: R10: 0000000000000001 R11: 0000000000000002 R12: ffffb190804d38d0
Mar 26 12:53:04 mylaptop kernel: R13: ffff9742b57bdde8 R14: 00000000fffffffe R15: ffff9742b57bdde0
Mar 26 12:53:04 mylaptop kernel: FS: 0000000000000000(0000) GS:ffff974440600000(0000) knlGS:0000000000000000
Mar 26 12:53:04 mylaptop kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 26 12:53:04 mylaptop kernel: CR2: 00007f887802a000 CR3: 000000011fe10004 CR4: 00000000003706f0
Mar 26 12:53:04 mylaptop kernel: Call Trace:
Mar 26 12:53:04 mylaptop kernel:
Mar 26 12:53:04 mylaptop kernel: pageout+0xce/0x250
Mar 26 12:53:04 mylaptop kernel: shrink_folio_list+0x5da/0xba0
Mar 26 12:53:04 mylaptop kernel: evict_folios+0x26a/0x610
Mar 26 12:53:04 mylaptop kernel: shrink_lruvec+0x312/0x1080
Mar 26 12:53:04 mylaptop kernel: ? list_lru_count_one+0x50/0x90
Mar 26 12:53:04 mylaptop kernel: ? mem_cgroup_iter+0x113/0x290
Mar 26 12:53:04 mylaptop kernel: shrink_node+0x204/0x710
Mar 26 12:53:04 mylaptop kernel: balance_pgdat+0x309/0xa40
Mar 26 12:53:04 mylaptop kernel: ? psi_task_switch+0xd6/0x230
Mar 26 12:53:04 mylaptop kernel: ? __switch_to_asm+0x3e/0x60
Mar 26 12:53:04 mylaptop kernel: kswapd+0x1f8/0x3b0
Mar 26 12:53:04 mylaptop kernel: ? sugov_start+0x150/0x150
Mar 26 12:53:04 mylaptop kernel: ? balance_pgdat+0xa40/0xa40
Mar 26 12:53:04 mylaptop kernel: kthread+0xdb/0x110
Mar 26 12:53:04 mylaptop kernel: ? kthread_complete_and_exit+0x20/0x20
Mar 26 12:53:04 mylaptop kernel: ret_from_fork+0x1f/0x30
Mar 26 12:53:04 mylaptop kernel:
Mar 26 12:53:04 mylaptop kernel: Modules linked in: ccm rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xfs dm_crypt cbc encrypted_keys trusted asn1_encoder tee snd_hda_codec_hdmi nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet snd_hda_codec_realtek nf_reject_ipv4 snd_hda_codec_generic nf_re>
Mar 26 12:53:04 mylaptop kernel: coretemp lz4hc_compress snd_hda_codec snd_hda_core mac80211 kvm_intel snd_hwdep libarc4 i915 uvcvideo btusb btrtl videobuf2_vmalloc kvm hid_multitouch btbcm iwlwifi btintel irqbypass drm_buddy iTCO_wdt videobuf2_memops r8169 ttm btmtk intel_pmc_bxt snd_pcm videobuf2_v4l2 rapl real>
Mar 26 12:53:04 mylaptop kernel: xhci_pci_renesas nvme_common cryptd rtsx_pci i2c_hid i8042 video serio wmi pkcs8_key_parser crypto_user
Mar 26 12:53:04 mylaptop kernel: —[ end trace 0000000000000000 ]—
Mar 26 12:53:04 mylaptop kernel: RIP: 0010:find_lock_entries+0xa8/0x220
Mar 26 12:53:04 mylaptop kernel: Code: 93 00 48 89 c7 48 3d 06 04 00 00 74 ea 48 3d 02 04 00 00 0f 84 c4 00 00 00 48 85 c0 0f 84 ef 00 00 00 a8 01 0f 85 54 01 00 00 <8b> 40 34 85 c0 0f 84 a8 00 00 00 8d 50 01 f0 0f b1 57 34 75 ee 48
Mar 26 12:53:04 mylaptop kernel: RSP: 0018:ffffb190a828bb78 EFLAGS: 00010246
Mar 26 12:53:04 mylaptop kernel: RAX: fffff9a5ca0459c0 RBX: fffffffffffffffe RCX: 0000000000000000
Mar 26 12:53:04 mylaptop kernel: RDX: 0000000000000001 RSI: ffff9743596206d8 RDI: fffff9a5ca0459c0
Mar 26 12:53:04 mylaptop kernel: RBP: ffffb190a828bcc8 R08: fffffffffffffffe R09: 0000000000000001
Mar 26 12:53:04 mylaptop kernel: R10: ffffffffffffffc0 R11: 0000000000000000 R12: 0000000000000000
Mar 26 12:53:04 mylaptop kernel: R13: ffffb190a828bc50 R14: ffff9742b57bdde0 R15: fffff1a5ca045980
Mar 26 12:53:04 mylaptop kernel: FS: 0000000000000000(0000) GS:ffff974440600000(0000) knlGS:0000000000000000
Mar 26 12:53:04 mylaptop kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 26 12:53:04 mylaptop kernel: CR2: 00007f887802a000 CR3: 000000011fe10004 CR4: 00000000003706f0
Mar 26 12:53:04 mylaptop kernel: ------------[ cut here ]------------

2

Welcome to the forum @ksbhaskar !

Can you please re-format your output from terminal by marking it and applying </> in post editor? - Thanks!

Also, since there seems to be a kernel-bug, installing the LTS-Kernel might help, after updating your complete system:

sudo pacman -S linux-lts linux-lts-headers

…and rebooting.

EDIT:
…BIG RUBBISH of MINE! (So, please forget, since you are using an LTS-Kernel already…

Can you post some info on your hardware / drivers in use? - See…

https://discovery.endeavouros.com/forum-log-tool-options/how-to-include-systemlogs-in-your-post/2021/03/

3

Thank you for the prompt reply.

Here is the output formatted as code

12:53:04 mylaptop kernel: ------------[ cut here ]------------
Mar 26 12:53:04 mylaptop kernel: kernel BUG at mm/shmem.c:772!
Mar 26 12:53:04 mylaptop kernel: invalid opcode: 0000 [#4] PREEMPT SMP NOPTI
Mar 26 12:53:04 mylaptop kernel: CPU: 0 PID: 86 Comm: kswapd0 Tainted: G D W 6.1.21-1-lts #1 08d2e5ece03136efa7c6aeea9a9c40916b1bd8da
Mar 26 12:53:04 mylaptop kernel: Hardware name: System76 Darter Pro/Darter Pro, BIOS 1.07.07-1 06/24/2019
Mar 26 12:53:04 mylaptop kernel: RIP: 0010:shmem_writepage+0x40e/0x430
Mar 26 12:53:04 mylaptop kernel: Code: 89 35 66 21 c5 01 e9 da fc ff ff 48 c7 04 24 01 00 00 00 bd ff ff ff ff e9 3d fd ff ff 48 89 df e8 97 8e fe ff e9 e1 fd ff ff <0f> 0b 0f 0b e9 04 fd ff ff 0f 0b 41 be fe ff ff ff e9 88 fd ff ff
Mar 26 12:53:04 mylaptop kernel: RSP: 0018:ffffb190804d3848 EFLAGS: 00010282
Mar 26 12:53:04 mylaptop kernel: RAX: 0000000000000000 RBX: fffff1a5ca0459c0 RCX: ffff974440600000
Mar 26 12:53:04 mylaptop kernel: RDX: 0000000000000009 RSI: 0000000000000000 RDI: ffff9742b57bdde8
Mar 26 12:53:04 mylaptop kernel: RBP: 00000000ffffffff R08: 00000000000392d0 R09: 0000000000000017
Mar 26 12:53:04 mylaptop kernel: R10: 0000000000000001 R11: 0000000000000002 R12: ffffb190804d38d0
Mar 26 12:53:04 mylaptop kernel: R13: ffff9742b57bdde8 R14: 00000000fffffffe R15: ffff9742b57bdde0
Mar 26 12:53:04 mylaptop kernel: FS: 0000000000000000(0000) GS:ffff974440600000(0000) knlGS:0000000000000000
Mar 26 12:53:04 mylaptop kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 26 12:53:04 mylaptop kernel: CR2: 00007f887802a000 CR3: 000000011fe10004 CR4: 00000000003706f0
Mar 26 12:53:04 mylaptop kernel: Call Trace:
Mar 26 12:53:04 mylaptop kernel:
Mar 26 12:53:04 mylaptop kernel: pageout+0xce/0x250
Mar 26 12:53:04 mylaptop kernel: shrink_folio_list+0x5da/0xba0
Mar 26 12:53:04 mylaptop kernel: evict_folios+0x26a/0x610
Mar 26 12:53:04 mylaptop kernel: shrink_lruvec+0x312/0x1080
Mar 26 12:53:04 mylaptop kernel: ? list_lru_count_one+0x50/0x90
Mar 26 12:53:04 mylaptop kernel: ? mem_cgroup_iter+0x113/0x290
Mar 26 12:53:04 mylaptop kernel: shrink_node+0x204/0x710
Mar 26 12:53:04 mylaptop kernel: balance_pgdat+0x309/0xa40
Mar 26 12:53:04 mylaptop kernel: ? psi_task_switch+0xd6/0x230
Mar 26 12:53:04 mylaptop kernel: ? __switch_to_asm+0x3e/0x60
Mar 26 12:53:04 mylaptop kernel: kswapd+0x1f8/0x3b0
Mar 26 12:53:04 mylaptop kernel: ? sugov_start+0x150/0x150
Mar 26 12:53:04 mylaptop kernel: ? balance_pgdat+0xa40/0xa40
Mar 26 12:53:04 mylaptop kernel: kthread+0xdb/0x110
Mar 26 12:53:04 mylaptop kernel: ? kthread_complete_and_exit+0x20/0x20
Mar 26 12:53:04 mylaptop kernel: ret_from_fork+0x1f/0x30
Mar 26 12:53:04 mylaptop kernel:
Mar 26 12:53:04 mylaptop kernel: Modules linked in: ccm rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xfs dm_crypt cbc encrypted_keys trusted asn1_encoder tee snd_hda_codec_hdmi nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet snd_hda_codec_realtek nf_reject_ipv4 snd_hda_codec_generic nf_re>
Mar 26 12:53:04 mylaptop kernel: coretemp lz4hc_compress snd_hda_codec snd_hda_core mac80211 kvm_intel snd_hwdep libarc4 i915 uvcvideo btusb btrtl videobuf2_vmalloc kvm hid_multitouch btbcm iwlwifi btintel irqbypass drm_buddy iTCO_wdt videobuf2_memops r8169 ttm btmtk intel_pmc_bxt snd_pcm videobuf2_v4l2 rapl real>
Mar 26 12:53:04 mylaptop kernel: xhci_pci_renesas nvme_common cryptd rtsx_pci i2c_hid i8042 video serio wmi pkcs8_key_parser crypto_user
Mar 26 12:53:04 mylaptop kernel: —[ end trace 0000000000000000 ]—
Mar 26 12:53:04 mylaptop kernel: RIP: 0010:find_lock_entries+0xa8/0x220
Mar 26 12:53:04 mylaptop kernel: Code: 93 00 48 89 c7 48 3d 06 04 00 00 74 ea 48 3d 02 04 00 00 0f 84 c4 00 00 00 48 85 c0 0f 84 ef 00 00 00 a8 01 0f 85 54 01 00 00 <8b> 40 34 85 c0 0f 84 a8 00 00 00 8d 50 01 f0 0f b1 57 34 75 ee 48
Mar 26 12:53:04 mylaptop kernel: RSP: 0018:ffffb190a828bb78 EFLAGS: 00010246
Mar 26 12:53:04 mylaptop kernel: RAX: fffff9a5ca0459c0 RBX: fffffffffffffffe RCX: 0000000000000000
Mar 26 12:53:04 mylaptop kernel: RDX: 0000000000000001 RSI: ffff9743596206d8 RDI: fffff9a5ca0459c0
Mar 26 12:53:04 mylaptop kernel: RBP: ffffb190a828bcc8 R08: fffffffffffffffe R09: 0000000000000001
Mar 26 12:53:04 mylaptop kernel: R10: ffffffffffffffc0 R11: 0000000000000000 R12: 0000000000000000
Mar 26 12:53:04 mylaptop kernel: R13: ffffb190a828bc50 R14: ffff9742b57bdde0 R15: fffff1a5ca045980
Mar 26 12:53:04 mylaptop kernel: FS: 0000000000000000(0000) GS:ffff974440600000(0000) knlGS:0000000000000000
Mar 26 12:53:04 mylaptop kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 26 12:53:04 mylaptop kernel: CR2: 00007f887802a000 CR3: 000000011fe10004 CR4: 00000000003706f0
Mar 26 12:53:04 mylaptop kernel: ------------[ cut here ]------------

Here is information on the hardware:

$ inxi -Fxxc0z
System:
  Kernel: 6.1.21-1-lts arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
    Desktop: Cinnamon v: 5.6.8 tk: GTK v: 3.24.37 dm: 1: LightDM note: stopped
    2: SDDM Distro: EndeavourOS base: Arch Linux
Machine:
  Type: Laptop System: System76 product: Darter Pro v: darp5
    serial: <superuser required>
  Mobo: System76 model: Darter Pro v: darp5 serial: <superuser required>
    UEFI: INSYDE v: 1.07.07-1 date: 06/24/2019
Battery:
  ID-1: BAT0 charge: 43.4 Wh (91.9%) condition: 47.2/53.2 Wh (88.8%)
    volts: 16.8 min: 15.4 model: Notebook BAT serial: <filter> status: charging
CPU:
  Info: quad core model: Intel Core i7-8565U bits: 64 type: MT MCP
    arch: Whiskey Lake rev: B cache: L1: 256 KiB L2: 1024 KiB L3: 8 MiB
  Speed (MHz): avg: 950 high: 2000 min/max: 400/4600 cores: 1: 800 2: 800
    3: 800 4: 800 5: 800 6: 2000 7: 800 8: 800 bogomips: 32012
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] vendor: CLEVO/KAPOK
    driver: i915 v: kernel arch: Gen-9.5 ports: active: HDMI-A-1 off: eDP-1
    empty: DP-1,HDMI-A-2 bus-ID: 00:02.0 chip-ID: 8086:3ea0
  Device-2: Bison BisonCam NB Pro type: USB driver: uvcvideo bus-ID: 1-7:3
    chip-ID: 5986:9102
  Display: x11 server: X.Org v: 21.1.7 with: Xwayland v: 23.1.0 driver: X:
    loaded: modesetting alternate: fbdev,intel,vesa dri: iris gpu: i915
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96
  Monitor-1: HDMI-A-1 mapped: HDMI-1 pos: primary model: LG (GoldStar) IPS
    FULLHD res: 1920x1080 dpi: 102 diag: 551mm (21.7")
  Monitor-2: eDP-1 note: disabled model: LG Display 0x05e5 res: 1920x1080
    dpi: 142 diag: 395mm (15.5")
  API: OpenGL v: 4.6 Mesa 23.0.0 renderer: Mesa Intel UHD Graphics 620 (WHL
    GT2) direct-render: Yes
Audio:
  Device-1: Intel Cannon Point-LP High Definition Audio vendor: CLEVO/KAPOK
    driver: snd_hda_intel v: kernel bus-ID: 00:1f.3 chip-ID: 8086:9dc8
  Sound API: ALSA v: k6.1.21-1-lts running: yes
  Sound Server-1: PulseAudio v: 16.1 running: no
  Sound Server-2: PipeWire v: 0.3.67 running: yes
Network:
  Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi v: kernel
    bus-ID: 00:14.3 chip-ID: 8086:9df0
  IF: wlan0 state: down mac: <filter>
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: CLEVO/KAPOK driver: r8169 v: kernel pcie: speed: 2.5 GT/s lanes: 1
    port: 3000 bus-ID: 39:00.1 chip-ID: 10ec:8168
  IF: enp57s0f1 state: up speed: 1000 Mbps duplex: full mac: <filter>
Bluetooth:
  Device-1: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) type: USB
    driver: btusb v: 0.8 bus-ID: 1-10:36 chip-ID: 8087:0aaa
  Report: rfkill ID: hci0 rfk-id: 8 state: up address: see --recommends
Drives:
  Local Storage: total: 465.76 GiB used: 288.86 GiB (62.0%)
  ID-1: /dev/nvme0n1 vendor: HP model: SSD EX900 500GB size: 465.76 GiB
    speed: 31.6 Gb/s lanes: 4 serial: <filter> temp: 45.9 C
Partition:
  ID-1: / size: 46.95 GiB used: 16.59 GiB (35.3%) fs: ext4 dev: /dev/nvme0n1p2
  ID-2: /boot/efi size: 479 MiB used: 312 KiB (0.1%) fs: vfat
    dev: /dev/nvme0n1p1
  ID-3: /home size: 95.94 GiB used: 45.79 GiB (47.7%) fs: xfs dev: /dev/dm-0
    mapped: home-aes
Swap:
  ID-1: swap-1 type: partition size: 16 GiB used: 10.7 MiB (0.1%) priority: -2
    dev: /dev/dm-1 mapped: swap-aes
Sensors:
  System Temperatures: cpu: 58.0 C pch: 48.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 317 Uptime: 1d 13h 6m Memory: 15.34 GiB used: 10.89 GiB (71.0%)
  Init: systemd v: 253 default: graphical Compilers: gcc: 12.2.1 Packages:
  pm: pacman pkgs: 1277 Shell: Bash v: 5.1.16 running-in: konsole inxi: 3.3.25
$