I lied. I experimented with ./configure flags. --with-kerberos5=/usr
is definitely the flag that is triggering the crash. Removing this flag alone cures the crash. Command that was used: ../configure --build=x86_64-linux-gnu --prefix=/usr \ --includedir=\${prefix}/include --mandir=\${prefix}/share/man \ --infodir=\${prefix}/share/info --sysconfdir=/etc \ --localstatedir=/var --disable-silent-rules \ --libdir=\${prefix}/lib/x86_64-linux-gnu \ --libexecdir=\${prefix}/lib/x86_64-linux-gnu \ --disable-maintainer-mode --disable-dependency-tracking \ --sysconfdir=/etc/ssh --libexecdir=\${prefix}/lib/openssh \ --disable-strip --with-mantype=doc --with-4in6 \ --with-privsep-path=/run/sshd --with-pid-dir=/run \ --with-tcp-wrappers --with-pam --with-libedit \ --with-systemd \ --with-xauth=/usr/bin/xauth \ --with-default-path=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games \ --with-superuser-path=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin \ --with-cflags="-Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/home/kennykb/debian.org/openssh=. -fstack-protector-strong -Wformat -Werror=format-security -DSSH_EXTRAVERSION=\\\"Ubuntu-3\\\"" "--with-ldflags=-Wl,--as-needed -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now" \ --with-ssl-engine --with-selinux --with-audit=linux # removed # --with-kerberos5=/usr -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1690485 Title: openssh-server SIGSYS with 'UsePrivilegeSeparation sandbox' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1690485/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs