Segfault error 6

segfault error 6

Segfault Error 6 in libc-2.27.so on Import Certificate #148. Closed. reefland opened this issue on May 4, 2018 · 10 comments. www.thegeekdiary.com › what-are-segfault-messages-in-var-log-messages-. sp - stack pointer. error - An error code for page faults; see below for what this means on x86. /* * Page fault error.

Segfault error 6 - similar it

What are “segfault” messages in /var/log/messages file

This post explains how to analyse the segfault message in message file and to identify the problem in application or operating system side.

What is “segfault”?

A segmentation fault (often shortened to segfault) or access violation is a fault raised by hardware with memory protection, to notify operating system (OS) about a memory access violation. The Linux kernel will response it by performing some corrective action, generally passing the fault to the offending process by sending the process a signal like #11. Processes can in some cases install a custom signal handler, allowing them to recover on their own, but otherwise the Linux default signal handler is used. The segfault generally will cause process to be terminated, and generates a core dump with proper ulimit setup.

How to check?

1. Signify segfault

A segfault typically just signifies an error in one particular process or program. It does not signify an error of the Linux Kernel. The kernel just detects the error of the process or program and (on some architectures) prints the information to the log like below:

kernel: login[118125]: segfault at 0 ip 00007f4e4d5334a8 sp 00007fffe9177d60 error 15 in pam_unity_uac.so[7f4e4d530000+b000] kernel: crond[16398]: segfault at 14 ip 00007fd612c128f2 sp 00007fff6a689010 error 4 in pam_seos.so[7fd612baf000+f5000] kernel: crond[17719]: segfault at 14 ip 00007fd612c128f2 sp 00007fff6a689010 error 4 in pam_seos.so[7fd612baf000+f5000

2. What does mean details this message?

The RIP value is the instruction pointer register value, the RSP is the stack pointer register value. The error value is a bit mask of page fault error code bits (from arch/x86/mm/fault.c):

* bit 0 == 0: no page found 1: protection fault * bit 1 == 0: read access 1: write access * bit 2 == 0: kernel-mode access 1: user-mode access * bit 3 == 1: use of reserved bit detected * bit 4 == 1: fault was an instruction fetch

Here’s error bit definition:

enum x86_pf_error_code { PF_PROT = 1 << 0, PF_WRITE = 1 << 1, PF_USER = 1 << 2, PF_RSVD = 1 << 3, PF_INSTR = 1 << 4, };

The error code 15 is 1111 bit. Finally, we can know the meaning of 1111 as follows:

01111 ^^^^^

Node Crashes Multiple Times During Reboot

Summary

Analysis as to why a node may crash multiple times during reboot (Intel® Rack Scale Design Direct)

Description

Various processes segfault (Segmentation Fault Error) may show up.  The following is an output provided as an example:

{{{
2018-06-11T02:21:11.407233+02:00 jrc5065 kernel: chroma[22449]: segfault at 0 ip 00002b9380c262e9 sp 00007ffefc169c40 error 4
2018-06-11T02:21:11.407405+02:00 jrc5065 kernel: chroma[22451]: segfault at 0 ip 00002ab0069dd2e9 sp 00007ffe41d38640 error 4
2018-06-11T02:21:11.407490+02:00 jrc5065 kernel: chroma[22443]: segfault at 0 ip 00002b1b4fcde2e9 sp 00007ffdf555a0c0 error 4
2018-06-11T02:21:11.407760+02:00 jrc5065 kernel: chroma[22447]: segfault at 0 ip 00002b36481552e9 sp 00007ffd349e1bc0 error 4
2018-07-10T15:17:56.674483+02:00 jrc5065 kernel: systemd-udevd[1812]: segfault at 67247d ip 000055b97d97fd54 sp 00007ffeb37912d0 error 6 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:56.728418+02:00 jrc5065 kernel: systemd-udevd[1815]: segfault at 55b97d9aecf0 ip 000055b97d97bdf8 sp 00007ffeb37912d0 error 7 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:56.903902+02:00 jrc5065 kernel: systemd-udevd[1839]: segfault at 55b97d9aecf0 ip 000055b97d97bdf8 sp 00007ffeb37912d0 error 7 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:56.932901+02:00 jrc5065 kernel: systemd-udevd[1810]: segfault at 55b97d9aecf0 ip 000055b97d97bdf8 sp 00007ffeb37912d0 error 7 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:56.979885+02:00 jrc5065 kernel: systemd-udevd[1826]: segfault at 55b97d9aecf0 ip 000055b97d97bdf8 sp 00007ffeb37912d0 error 7 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:57.273517+02:00 jrc5065 kernel: systemd-udevd[1821]: segfault at 5 ip 00007ff4618ffcff sp 00007ffeb3790d00 error 4 in liblzma.so.5.2.2[7ff4618eb000+25000]
2018-07-10T15:17:57.273677+02:00 jrc5065 kernel: systemd-udevd[1831]: segfault at 67247d ip 000055b97d97fd54 sp 00007ffeb37912d0 error 6 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:57.273750+02:00 jrc5065 kernel: systemd-udevd[1835]: segfault at 7 ip 000055b97d97bdff sp 00007ffeb37912d0 error 6 in systemd-udevd[55b97d976000+4b000]
2018-07-10T15:17:57.277861+02:00 jrc5065 kernel: systemd-udevd[1859]: segfault at 5 ip 00007ff4618ffcff sp 00007ffeb3790d00 error 4 in liblzma.so.5.2.2[7ff4618eb000+25000]
2018-07-10T15:18:42.602983+02:00 jrc5065 kernel: mmremote[6059]: segfault at fffffffffffee0bc ip 00000000004adfde sp 00007ffeb9a2b2c0 error 7 in mmksh[400000+128000]
2018-07-10T15:19:26.350965+02:00 jrc5065 kernel: runmmfs[5832]: segfault at f200f70a ip 00007f713e553706 sp 00007ffcdc458328 error 6 in libc-2.17.so[7f713e422000+1b8000]
2018-07-10T15:21:21.926079+02:00 jrc5065 kernel: mmremote[16345]: segfault at fffffffffffee0bc ip 00000000004adfde sp 00007fff2e2f3d90 error 7 in mmksh[400000+128000]
}}}

Nothing shows up in (System Event Log), though.

Resolution

Contact support with the system event log1 and sos report2 (if possible/available) for diagnosis should you need further assistance.

1How to Extract and Read the System Event Log (SEL) for Intel® Server Boards

2 Notes on the sos report:
. It is an utility that gathers configuration and diagnostic information about the system. 
. It needs to be installed first via "sudo apt-get install sosreport" command. 
. Reboot the system after the install; then, run the utility.

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