openssh: update to 10.4p1.

[leahneukirchen]

Testing the changes

• I tested the changes in this PR: briefly on x86_64.

[fajabird]

I installed void-rpi-armv6l-PLATFORMFS-20250202.tar.xz in a Raspberry Pi 1 Modell B+
First I could login via SSH and did a update (xbps-install -Su) which also updates openssh to 10.4p1_1:

2026-07-19T08:16:37.29837 user.notice: Jul 19 08:16:37 xbps-install: openssh-9.9p1_1: updating to 10.4p1_1 ... (rootdir: /)
2026-07-19T08:16:39.07240 user.notice: Jul 19 08:16:39 xbps-install: Updated `openssh-10.4p1_1' successfully (rootdir: /).

After reboot I no longer can login via SSH.

I recreated the SD-card again and installed socklog and configured openssh to DEBUG3 loglevel (DAEMON facility).

Here is what I can see in the log when trying to connect after doing the full update again:

sshd-session[664]: debug3: ssh_sandbox_child: attaching seccomp filter program [preauth]
2026-07-19T08:22:40.64567 daemon.crit: Jul 19 08:22:40 sshd-session[664]: fatal: ssh_sandbox_child: prctl(PR_SET_SECCOMP): Unknown error 524 [preauth]

[leahneukirchen]

Can you post which kernel version this is?

[fajabird]

Can you post which kernel version this is?

sure, this is the one coming with the tarball: uname -a
Linux voidpi 6.6.69_2 #1 SMP Sun Jan 12 17:48:18 UTC 2025 armv6l GNU/Linux

this is the one after xbps-install -Su (as of yesterday):
Linux voidpi 6.12.87_1 #1 Sat May 9 00:07:32 UTC 2026 armv6l GNU/Linux

both affected.