From: Jim Pazarena <fquest@paz.bz> To: questions@freebsd.org Subject: Re: FBSD 14.0 / exim 4,97.1 - exim SIGSEGV
| raw e-mail | index | archive | help
On 2024-05-21 3:05 AM, Odhiambo Washington wrote:
>
>
> On Sun, May 19, 2024 at 7:24 PM tetrosalame <tml@seiruote.it
> <mailto:tml@seiruote.it>> wrote:
>
> Il 19/05/2024 16:46, Jim Pazarena ha scritto:
> > I upgraded both of the captioned versions at the same time, so it
> is not
> > clear to me which is causing this issue.. however, since upgrading,
> > often but without any discernible cycle or frequency, exim refuses
> > incoming connections, and logs the following:
> >
> > 2024-05-19 07:21:00 SIGSEGV (fault address: 0xffffffffffffff70)
> > 2024-05-19 07:21:00 SIGSEGV (maybe attempt to write to immutable
> memory)
>
> Maybe exim is violating some policy?
> What does sysctl kern.elf${your_arch}.allow_wx say?
>
> FreeBSD14 features some pretty memory protections: see mitigations(7).
> Bye,
> f
>
>
> I am running the same version of Exim on the same version of FreeBSD (on
> two different servers, no custom kernel) and I haven't seen these symptoms.
> If anything, here is the output of what you asked:
>
> ``
> wash@gw:~$ sysctl -a | grep allow_wx
> kern.elf32.allow_wx: 1
> kern.elf64.allow_wx: 1
> ```
>
> But I did not configure these.
>
>
> --
> Best regards,
> Odhiambo WASHINGTON,
My sending server is SSL outbound capable (if SSL has anything to do
with this - which seems unlikely). However the sending server remains at
FBSD 13.2p11, Exim 4.94.2
The smtp server sends to both direct via ethernet (public IP) connected
servers plus a couple of local email accounts which use fetchmail
The chassis which it sends these emails to are all 14.0p6. and exim 4.97.1.
My results for the "allow_wx" also were '1'. I changed these to '0' and
email wouldn't flow at all.
So, I am in the throws of re-loading two chassis to FreeBSD 13.3p1
If this resolves email sending and eliminates the SIGSEGV, I will have a
more firm grasp of the issue.
I hear you ... you have not experienced these symptoms.
I compile exim myself. Perhaps I have some odd 'Local/Makefile' settings.
--
Jim Pazarena fquest@paz.bz
Haida Gwaii - British Columbia - Canada
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?>