Bug#1103418: openssh-server irregularly crashing since 10.0p1 upgrade

[Colin Watson <cjwatson@debian.org>]

Control: forwarded -1 https://bugzilla.mindrot.org/show_bug.cgi?id=3822

On Tue, May 06, 2025 at 07:28:59PM +0200, Michel Casabona wrote:
> Sorry for the delay. Here are the results from some testing.
> It seems that the problem may be related to pam_ecryptfs, after all
[...]
> * To exclude any local things and remnants from years of experiments 
> on my desktop machine, I've setup new virtual machines
> (using libvirt / virt-manager, AMD64, UEFI if that matters) as follows:
>
> - install trixie with the Debian installer Trixie Alpha 1 (netinst)
> - no desktop, only ssh server
> - add a few convenience packages (sudo mc vim)
> - add debugging packages (systemd-coredump, gdb, debuginfod, valgrind)
> at this point ssh seems to work correctly
>
> - add ecryptfs-utils (+ cryptsetup / rsync)
> then ssh-session starts to crash most of the time

Thanks, this was extremely helpful!  I was finally able to reproduce 
this bug, and tracked it down to the --with-linux-memlock-onfault 
configure option.  I forwarded this to
https://bugzilla.mindrot.org/show_bug.cgi?id=3822.

I'm going to disable this option again for now, as it's a recent 
addition and isn't security-critical.

--
Colin Watson (he/him)                              [cjwatson@debian.org]