Re: [exim] 4.95-RC0 - SIGSEGV (maybe attempt to write to imm…

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Author: Andrew Colin Kissa
Date:  
To: Jakobus Schürz via Exim-users
Subject: Re: [exim] 4.95-RC0 - SIGSEGV (maybe attempt to write to immutable memory) & other oddities


> On 08 Oct 2021, at 17:22, Jeremy Harris via Exim-users <exim-users@???> wrote:
>
> Enable coredumps for suid processes, per core(5). You may also need
> to ensure that whatever is starting the exim is question (systemd or
> similar for the daemon and smtp-accept-initiated delivery procs;
> a user for command-line sourced mail initiation) is *not* limiting
> core file size to zero ("ulimit" in the shell manpage).
>
> Also, if your system runs abrt then the corefile might get stolen by it
> and put somewhere you didn't initially expect (check the abrt config
> in /etc).
>
> Once you get a coredump file, feed it to gdb and get a stack trace.
>
>
> If you're running a self-built binary of exim, building with "-O0 -ggdb"
> will get us more detail in the stack trace.
>
> Don't forget to disable suid coredumps again afterwards.


Thanks, am on it. It has not happened yet once it does i will obtain the
stack trace.

- Andrew