ssh-keygen segfaults on S912 with kernel 6.18.22

[FenrixiR]

Device Information | 设备信息

• SOC: [S912]
• Model [DSDevices DSCS9, though not applicable as it is reproducible on other devices too]

Armbian Version | 系统版本

• Armbian_26.05.0_amlogic_s912_trixie_6.18.22_server_2026.04.18.img
• Kernel Version: [6.18.22]
• Release: [trixie]

Describe the bug | 问题描述
ssh-keygen -A segfaults on kernel 6.18.22 on Amlogic S912 hardware, preventing openssh-server from starting. The issue does not occur on kernel 6.12.81 with the same image/hardware.

To Reproduce

1. Flash Armbian_26.05.0_amlogic_s912_trixie_6.18.22_server_2026.04.18.img
2. Boot on S912 hardware
3. Attempt to start SSH: systemctl start ssh
4. SSH fails — journalctl shows ConditionFirstBoot=yes causing host key generation to be skipped
5. Manual ssh-keygen -A produces a segmentation fault
6. dpkg-reconfigure openssh-server also segfaults at the same point

Expected behavior
SSH host keys are generated and sshd starts successfully on first boot, as it does on kernel 6.12.81.

Kernel versions tested

• 6.12.81 — works correctly (Armbian_26.05.0_amlogic_s912_trixie_6.12.81_server_2026.04.18.img)
• 6.18.22 — segfaults on ssh-keygen (Armbian_26.05.0_amlogic_s912_trixie_6.18.22_server_2026.04.18.img)

Additional context
The segfault occurs in openssh-server's post-install script during ssh-keygen -A, suggesting a possible OpenSSL/libcrypto incompatibility with kernel 6.18.22 on aarch64 S912.