Hello Vincas Dargis,
I guess the provided information may not be enough for the
maintainer to find the cause or make a fix.
And I am just curious, but this "0x2f9b8" are just the "195000" from
the kernel log line? I am not sure, but would here not make
0x7f9cf2783000 - 0x7f9cf2803676 = 0x80676 more sense?
That way we would end in the strlen function, at least an instruction
with offset ...676 like the instruction pointer "ip".
But to get more information of a crash you could consider
installing a core dump collector like systemd-coredump.
Then a first backtrace would be already written to the logs.
You could list the cores collected at least of the current boot:
coredumpctl list
(previous boots might just get stored in /var/lib/systemd/coredump)
And get more information from the core by e.g.:
coredumpctl gdb [PID]
bt
Even better would be if debug symbols are installed like
described in [1], in this case ntp-dbgsym.
Kind regards,
Bernhard
[1] https://wiki.debian.org/HowToGetABacktrace#Installing_the_debugging_symbols
root@debian:~# apt install gdb binutils ntp ntp-dbgsym
root@debian:~# addr2line -e /lib/x86_64-linux-gnu/libc-2.24.so 0x80676
/build/glibc-yWQXbR/glibc-2.24/string/../sysdeps/x86_64/strlen.S:106
root@debian:~# gdb -q -ex 'b main' -ex 'run' -ex 'dele 1' --args /usr/sbin/ntpd
Reading symbols from /usr/sbin/ntpd...Reading symbols from
/usr/lib/debug/.build-id/5a/8c27a9b583247c96d38ca88835dc36f0ad253d.debug...done.
done.
Breakpoint 1 at 0x12390: file ntpd.c, line 400.
Starting program: /usr/sbin/ntpd
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Breakpoint 1, main (argc=1, argv=0x7fffffffed28) at ntpd.c:400
400 ntpd.c: Datei oder Verzeichnis nicht gefunden.
(gdb) b strlen.S:106
Breakpoint 2 at 0x7ffff6cd9676: strlen.S:106. (2 locations)
(gdb) disassemble 0x7ffff6cd9676-0x16,0x7ffff6cd9676+0x16
Dump of assembler code from 0x7ffff6cd9660 to 0x7ffff6cd968c:
0x00007ffff6cd9660 <strlen+16>: mov %rdi,%rax
0x00007ffff6cd9663 <strlen+19>: mov %rdi,%rcx
0x00007ffff6cd9666 <strlen+22>: and $0xfff,%rcx
0x00007ffff6cd966d <strlen+29>: cmp $0xfcf,%rcx
0x00007ffff6cd9674 <strlen+36>: ja 0x7ffff6cd96e0 <strlen+144>
0x00007ffff6cd9676 <strlen+38>: movdqu (%rax),%xmm4
0x00007ffff6cd967a <strlen+42>: pcmpeqb %xmm0,%xmm4
0x00007ffff6cd967e <strlen+46>: pmovmskb %xmm4,%edx
0x00007ffff6cd9682 <strlen+50>: test %edx,%edx
0x00007ffff6cd9684 <strlen+52>: je 0x7ffff6cd968a <strlen+58>
0x00007ffff6cd9686 <strlen+54>: bsf %edx,%eax
0x00007ffff6cd9689 <strlen+57>: retq
0x00007ffff6cd968a <strlen+58>: and $0xfffffffffffffff0,%rax
End of assembler dump.
