Public bug reported:
My system did freeze completely this morning (at 10:13). Looking at
journalctl I noticed a btrfs segfault. No idea if this is related,
however, a segfault in btrfs seems no good anyway ...
Is there any other info that might be helpful to analyse what went wrong?
How could I locate the core dump that is mentioned?
[code]
Nov 20 10:00:03 zenbook kernel: btrfs[53602]: segfault at 7fff4a4af217 ip
000055af44b84264 sp 00007fff464aedc0 error 4 in btrfs[55af44b40000+6c000]
Nov 20 10:00:03 zenbook kernel: Code: 44 24 14 00 00 00 00 31 c0 4c 8d bc 24 c0
00 00 00 8b 7c 24 14 3b bc 24 98 00 00 00 0f 83 ed 01 00 00 49 8d 14 07 48 83
c0 20 <8b> 72 18 8b 4a 1c 48 89 44 24 08 48 8b 6a 08 4c 8b 62 10 89 74 24
Nov 20 10:00:03 zenbook systemd[1]: Started Process Core Dump (PID 53603/UID 0).
Nov 20 10:00:03 zenbook systemd-coredump[53604]: Process 53602 (btrfs) of user
0 dumped core.
Stack trace of thread 53602:
#0 0x000055af44b84264 n/a
(btrfs + 0x58264)
#1 0x000055af44b844d5 n/a
(btrfs + 0x584d5)
#2 0x000055af44b851f3
btrfs_list_subvols_print (btrfs + 0x591f3)
#3 0x000055af44b4d774 n/a
(btrfs + 0x21774)
#4 0x000055af44b41c62 main
(btrfs + 0x15c62)
#5 0x00007f4fc85de0b3
__libc_start_main (libc.so.6 + 0x270b3)
#6 0x000055af44b41c9e
_start (btrfs + 0x15c9e)
Nov 20 10:00:03 zenbook systemd[1]: systemd-coredump@8-53603-0.service:
Succeeded.
Nov 20 10:00:03 zenbook kernel: btrfs[53623]: segfault at 7ffc4afde2a7 ip
000056147a460264 sp 00007ffc46fdde50 error 4 in btrfs[56147a41c000+6c000]
Nov 20 10:00:03 zenbook kernel: Code: 44 24 14 00 00 00 00 31 c0 4c 8d bc 24 c0
00 00 00 8b 7c 24 14 3b bc 24 98 00 00 00 0f 83 ed 01 00 00 49 8d 14 07 48 83
c0 20 <8b> 72 18 8b 4a 1c 48 89 44 24 08 48 8b 6a 08 4c 8b 62 10 89 74 24
Nov 20 10:00:03 zenbook systemd[1]: Started Process Core Dump (PID 53624/UID 0).
Nov 20 10:00:03 zenbook systemd-coredump[53625]: Process 53623 (btrfs) of user
0 dumped core.
Stack trace of thread 53623:
#0 0x000056147a460264 n/a
(btrfs + 0x58264)
#1 0x000056147a4604d5 n/a
(btrfs + 0x584d5)
#2 0x000056147a4611f3
btrfs_list_subvols_print (btrfs + 0x591f3)
#3 0x000056147a429774 n/a
(btrfs + 0x21774)
#4 0x000056147a41dc62 main
(btrfs + 0x15c62)
#5 0x00007fd63b8070b3
__libc_start_main (libc.so.6 + 0x270b3)
#6 0x000056147a41dc9e
_start (btrfs + 0x15c9e)
Nov 20 10:00:03 zenbook systemd[1]: systemd-coredump@9-53624-0.service:
Succeeded.
[/code]
System information: (lspci attached)
[code]
$ cat /proc/version_signature
Ubuntu 5.4.0-54.60-generic 5.4.65
System: Kernel: 5.4.0-54-generic x86_64 bits: 64 compiler: gcc v: 9.3.0
Desktop: Cinnamon 4.6.7
wm: muffin dm: LightDM Distro: Linux Mint 20 Ulyana base: Ubuntu
20.04 focal
Machine: Type: Convertible System: ASUSTeK product: ZenBook UX562FAC_UX562FA
v: 1.0
serial: <filter>
Mobo: ASUSTeK model: UX562FAC v: 1.0 serial: <filter> UEFI: American
Megatrends
v: UX562FAC.304 date: 05/06/2020
Battery: ID-1: BAT0 charge: 50.3 Wh condition: 50.3/56.0 Wh (90%) volts:
15.8/15.8
model: ASUSTeK ASUS Battery serial: <filter> status: Not charging
Device-1: hid-0018:04F3:2A45.0001-battery model: ELAN9008:00
04F3:2A45 serial: N/A
charge: N/A status: N/A
CPU: Topology: Quad Core model: Intel Core i7-10510U bits: 64 type: MT
MCP arch: Kaby Lake
rev: C L2 cache: 8192 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
bogomips: 36799
Speed: 3361 MHz min/max: 400/4900 MHz Core speeds (MHz): 1: 3341 2:
3351 3: 3365
4: 3324 5: 3345 6: 3389 7: 3312 8: 3324
Graphics: Device-1: Intel UHD Graphics vendor: ASUSTeK driver: i915 v: kernel
bus ID: 00:02.0
chip ID: 8086:9b41
Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded:
fbdev,vesa
resolution: 1920x1080~60Hz, 1920x1080~75Hz
OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa
20.0.8
direct render: Yes
Audio: Device-1: Intel vendor: ASUSTeK driver: snd_hda_intel v: kernel bus
ID: 00:1f.3
chip ID: 8086:02c8
Sound Server: ALSA v: k5.4.0-54-generic
Network: Device-1: Intel Wireless-AC 9462 driver: iwlwifi v: kernel port:
3000 bus ID: 00:14.3
chip ID: 8086:02f0
IF: wlo1 state: up mac: <filter>
IF-ID-1: docker0 state: down mac: <filter>
Drives: Local Storage: total: 953.87 GiB used: 318.43 GiB (33.4%)
ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB1T0HALR-00000 size:
953.87 GiB
speed: 31.6 Gb/s lanes: 4 serial: <filter>
RAID: Hardware-1: Intel Device driver: ahci v: 3.0 bus ID: 00:17.0 chip
ID: 8086.02d7
Partition: ID-1: / size: 304.74 GiB used: 118.22 GiB (38.8%) fs: btrfs dev:
/dev/nvme0n1p6
ID-2: /home size: 304.74 GiB used: 118.22 GiB (38.8%) fs: btrfs dev:
/dev/nvme0n1p6
ID-3: swap-1 size: 15.26 GiB used: 0 KiB (0.0%) fs: swap dev:
/dev/nvme0n1p5
Info: Processes: 329 Uptime: 7m Memory: 15.46 GiB used: 3.61 GiB (23.4%)
Init: systemd v: 245
runlevel: 5 Compilers: gcc: 9.3.0 alt: 8/9 Client: Unknown python3.8
client
inxi: 3.0.38
[/code]
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: btrfs
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/1905046/+attachment/5436360/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/1905046
Title:
kernel: btrfs[53602]: segfault at 7fff4a4af217 ip 000055af44b84264 sp
00007fff464aedc0 error 4 in btrfs[55af44b40000+6c000]
Status in linux package in Ubuntu:
New
Bug description:
My system did freeze completely this morning (at 10:13). Looking at
journalctl I noticed a btrfs segfault. No idea if this is related,
however, a segfault in btrfs seems no good anyway ...
Is there any other info that might be helpful to analyse what went wrong?
How could I locate the core dump that is mentioned?
[code]
Nov 20 10:00:03 zenbook kernel: btrfs[53602]: segfault at 7fff4a4af217 ip
000055af44b84264 sp 00007fff464aedc0 error 4 in btrfs[55af44b40000+6c000]
Nov 20 10:00:03 zenbook kernel: Code: 44 24 14 00 00 00 00 31 c0 4c 8d bc 24
c0 00 00 00 8b 7c 24 14 3b bc 24 98 00 00 00 0f 83 ed 01 00 00 49 8d 14 07 48
83 c0 20 <8b> 72 18 8b 4a 1c 48 89 44 24 08 48 8b 6a 08 4c 8b 62 10 89 74 24
Nov 20 10:00:03 zenbook systemd[1]: Started Process Core Dump (PID 53603/UID
0).
Nov 20 10:00:03 zenbook systemd-coredump[53604]: Process 53602 (btrfs) of
user 0 dumped core.
Stack trace of thread
53602:
#0 0x000055af44b84264 n/a
(btrfs + 0x58264)
#1 0x000055af44b844d5 n/a
(btrfs + 0x584d5)
#2 0x000055af44b851f3
btrfs_list_subvols_print (btrfs + 0x591f3)
#3 0x000055af44b4d774 n/a
(btrfs + 0x21774)
#4 0x000055af44b41c62
main (btrfs + 0x15c62)
#5 0x00007f4fc85de0b3
__libc_start_main (libc.so.6 + 0x270b3)
#6 0x000055af44b41c9e
_start (btrfs + 0x15c9e)
Nov 20 10:00:03 zenbook systemd[1]: systemd-coredump@8-53603-0.service:
Succeeded.
Nov 20 10:00:03 zenbook kernel: btrfs[53623]: segfault at 7ffc4afde2a7 ip
000056147a460264 sp 00007ffc46fdde50 error 4 in btrfs[56147a41c000+6c000]
Nov 20 10:00:03 zenbook kernel: Code: 44 24 14 00 00 00 00 31 c0 4c 8d bc 24
c0 00 00 00 8b 7c 24 14 3b bc 24 98 00 00 00 0f 83 ed 01 00 00 49 8d 14 07 48
83 c0 20 <8b> 72 18 8b 4a 1c 48 89 44 24 08 48 8b 6a 08 4c 8b 62 10 89 74 24
Nov 20 10:00:03 zenbook systemd[1]: Started Process Core Dump (PID 53624/UID
0).
Nov 20 10:00:03 zenbook systemd-coredump[53625]: Process 53623 (btrfs) of
user 0 dumped core.
Stack trace of thread
53623:
#0 0x000056147a460264 n/a
(btrfs + 0x58264)
#1 0x000056147a4604d5 n/a
(btrfs + 0x584d5)
#2 0x000056147a4611f3
btrfs_list_subvols_print (btrfs + 0x591f3)
#3 0x000056147a429774 n/a
(btrfs + 0x21774)
#4 0x000056147a41dc62
main (btrfs + 0x15c62)
#5 0x00007fd63b8070b3
__libc_start_main (libc.so.6 + 0x270b3)
#6 0x000056147a41dc9e
_start (btrfs + 0x15c9e)
Nov 20 10:00:03 zenbook systemd[1]: systemd-coredump@9-53624-0.service:
Succeeded.
[/code]
System information: (lspci attached)
[code]
$ cat /proc/version_signature
Ubuntu 5.4.0-54.60-generic 5.4.65
System: Kernel: 5.4.0-54-generic x86_64 bits: 64 compiler: gcc v: 9.3.0
Desktop: Cinnamon 4.6.7
wm: muffin dm: LightDM Distro: Linux Mint 20 Ulyana base: Ubuntu
20.04 focal
Machine: Type: Convertible System: ASUSTeK product: ZenBook
UX562FAC_UX562FA v: 1.0
serial: <filter>
Mobo: ASUSTeK model: UX562FAC v: 1.0 serial: <filter> UEFI:
American Megatrends
v: UX562FAC.304 date: 05/06/2020
Battery: ID-1: BAT0 charge: 50.3 Wh condition: 50.3/56.0 Wh (90%) volts:
15.8/15.8
model: ASUSTeK ASUS Battery serial: <filter> status: Not charging
Device-1: hid-0018:04F3:2A45.0001-battery model: ELAN9008:00
04F3:2A45 serial: N/A
charge: N/A status: N/A
CPU: Topology: Quad Core model: Intel Core i7-10510U bits: 64 type: MT
MCP arch: Kaby Lake
rev: C L2 cache: 8192 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
bogomips: 36799
Speed: 3361 MHz min/max: 400/4900 MHz Core speeds (MHz): 1: 3341
2: 3351 3: 3365
4: 3324 5: 3345 6: 3389 7: 3312 8: 3324
Graphics: Device-1: Intel UHD Graphics vendor: ASUSTeK driver: i915 v:
kernel bus ID: 00:02.0
chip ID: 8086:9b41
Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded:
fbdev,vesa
resolution: 1920x1080~60Hz, 1920x1080~75Hz
OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa
20.0.8
direct render: Yes
Audio: Device-1: Intel vendor: ASUSTeK driver: snd_hda_intel v: kernel
bus ID: 00:1f.3
chip ID: 8086:02c8
Sound Server: ALSA v: k5.4.0-54-generic
Network: Device-1: Intel Wireless-AC 9462 driver: iwlwifi v: kernel port:
3000 bus ID: 00:14.3
chip ID: 8086:02f0
IF: wlo1 state: up mac: <filter>
IF-ID-1: docker0 state: down mac: <filter>
Drives: Local Storage: total: 953.87 GiB used: 318.43 GiB (33.4%)
ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB1T0HALR-00000 size:
953.87 GiB
speed: 31.6 Gb/s lanes: 4 serial: <filter>
RAID: Hardware-1: Intel Device driver: ahci v: 3.0 bus ID: 00:17.0 chip
ID: 8086.02d7
Partition: ID-1: / size: 304.74 GiB used: 118.22 GiB (38.8%) fs: btrfs dev:
/dev/nvme0n1p6
ID-2: /home size: 304.74 GiB used: 118.22 GiB (38.8%) fs: btrfs
dev: /dev/nvme0n1p6
ID-3: swap-1 size: 15.26 GiB used: 0 KiB (0.0%) fs: swap dev:
/dev/nvme0n1p5
Info: Processes: 329 Uptime: 7m Memory: 15.46 GiB used: 3.61 GiB (23.4%)
Init: systemd v: 245
runlevel: 5 Compilers: gcc: 9.3.0 alt: 8/9 Client: Unknown
python3.8 client
inxi: 3.0.38
[/code]
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