I'm seeing these errors in my syslog recently...I'm not sure if this is a serious issue or not.

I've tried running memtest and it passed after 48hours of continuous runs.

 

May 22 17:25:23 unNAS kernel: zsh[18251]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:23 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:25 unNAS kernel: show_signal_msg: 2 callbacks suppressed
May 22 17:25:25 unNAS kernel: zsh[18340]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:25 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:28 unNAS kernel: zsh[18466]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:28 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:28 unNAS kernel: zsh[18473]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:28 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:28 unNAS kernel: zsh[18483]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:28 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:28 unNAS kernel: zsh[18503]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:28 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:29 unNAS kernel: zsh[18507]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14
May 22 17:25:29 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:29 unNAS kernel: zsh[18514]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14 in computil.so[1543e1657000+3000]
May 22 17:25:29 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:29 unNAS kernel: zsh[18523]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14 in computil.so[1543e1657000+3000]
May 22 17:25:29 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:29 unNAS kernel: zsh[18530]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14 in computil.so[1543e1657000+3000]
May 22 17:25:29 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.
May 22 17:25:29 unNAS kernel: zsh[18536]: segfault at 154300877e9f ip 0000154300877e9f sp 00007ffccb6ddf98 error 14 in computil.so[1543e1657000+3000]
May 22 17:25:29 unNAS kernel: Code: Unable to access opcode bytes at RIP 0x154300877e75.

 

unnas-diagnostics-20230522-1735.zip

Do you know what installed zsh? AFAIK it doesn't come with stock Unraid.

NerdTools

If the issue is only with zsh start by removing that.