Date: Fri, 10 Dec 2021 15:22:31 +0100
From: Dmitry Dolgov <9erthalion6@gmail.com>
To: "James Pang (chaolpan)" <chaolpan@cisco.com>
Cc: "pgsql-bugs@lists.postgresql.org" <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #17326: Postgres crashed when pg_reload_conf()  with ssl
 certificate parameters
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> On Fri, Dec 10, 2021 at 09:05:19AM +0000, James Pang (chaolpan) wrote:
> try to install debug_info and get stack,
> 1. use coredump ,
>  ]$ gdb -q -c /pgdata/core.1317550.sig11.1639122870s /usr/pgsql-13/bin/postgres
> Reading symbols from /usr/pgsql-13/bin/postgres...Reading symbols from .gnu_debugdata for /usr/pgsql-13/bin/postgres...(no debugging symbols found)...done.
> (no debugging symbols found)...done.
>
> warning: Can't open file (null) during file-backed mapping note processing
>
> warning: Can't open file (null) during file-backed mapping note processing
>
> warning: Can't open file (null) during file-backed mapping note processing
> [New LWP 1317550]
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> Core was generated by `/usr/pgsql-13/bin/postgres'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x00007f72e3290094 in asn1_string_embed_free () from /lib64/libcrypto.so.1.1
>
> 2. when gdb log ,
> Program received signal SIGHUP, Hangup.
> 0x00007f4fb438e25b in select () from /lib64/libc.so.6
> Continuing.
>
> Program received signal SIGHUP, Hangup.
> 0x00007f4fb438e25b in select () from /lib64/libc.so.6
> Continuing.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007f4fb5eef094 in asn1_string_embed_free () from /lib64/libcrypto.so.1.1
> Continuing.
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> The program no longer exists.
>
> Should I install debug info for set_user module too?

Eventually yes, but judging from the logs you've posted
("/usr/pgsql-13/bin/postgres...(no debugging symbols found)") the
debugging symbols for postgres itself are not there yet. Do you get a
meaningful stack trace from the coredump with the `bt` command right now?