<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div>Package: ltsp-client-core<br>Version: 5.5.9-2<br>Severity: important<br>Tags: upstream<br><br>Dear Maintainer,<br><br>we are upgrading our LTSP image from jessie to stretch. We are running<br>LTSP against HA NFS servers since 2010 (previously SUN storage systems<br>(ZFS based), since 2013 against NetApp filers). We encountered<br>the following problem:<br>- LTSP stretch client starts up fine<br>- SSH daemon on the LTSP client is enabled and starts up fine<br>- Connecting via SSH does not work<br>- Login in as root on the LTSP client console works fine<br>- sudo -iu <username> gives the following error<br>"sudo: unable to execute /bin/bash: Operation not supported"<br>- Using strace we found that seresuid and then accessing a file gives a<br> problem with the filesystem (overlay on top of NFS)<br>- We wrote a small C program to replicate the error and found that<br> overlay on top of NFS gives the above "Operation not supported"<br> whereas NFS directly works fine (/bin/bash (overlay) vs.<br> /rofs/bin/bash (NFS)).<br><br>After touching /bin/bash and therefore copying to upper fs /bin/bash<br>works fine for some UIDs but not for all user IDs.<br><br>Best regards<br>Rainer<br><br>-- System Information:<br>Debian Release: 9.1<br> APT prefers stable<br> APT policy: (500, 'stable')<br>Architecture: amd64 (x86_64)<br>Foreign Architectures: i386<br><br>Kernel: Linux 4.9.0-3-amd64 (SMP w/4 CPU cores)<br>Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)<br>Shell: /bin/sh linked to /bin/dash<br>Init: systemd (via /run/systemd/system)<br><br>Versions of packages ltsp-client-core depends on:<br>ii console-setup 1.164<br>ii init 1.48<br>ii initramfs-tools 0.130<br>ii iproute 1:4.9.0-1<br>ii iproute2 4.9.0-1<br>ii kbd 2.0.3-2+b1<br>ii libc6 2.24-11+deb9u1<br>ii libpopt0 1.16-10+b2<br>ii lsb-base 9.20161125<br>ii lsb-release 9.20161125<br>ii nbd-client 1:3.15.2-3<br>ii pxelinux 3:6.03+dfsg-14.1<br>ii python 2.7.13-2<br>ii syslinux-common 3:6.03+dfsg-14.1<br>ii tftp-hpa 5.2+20150808-1+b1<br><br>Versions of packages ltsp-client-core recommends:<br>ii acpi-support-base 0.142-8<br>ii dbus 1.10.18-1<br>ii dnsutils 1:9.10.3.dfsg.P4-12.3+deb9u2<br>ii pciutils 1:3.5.2-1<br>ii procps 2:3.3.12-3<br><br>Versions of packages ltsp-client-core suggests:<br>pn alsa-utils <none><br>ii cron 3.0pl1-128+b1<br>pn cryptsetup <none><br>pn cups-bsd <none><br>pn freerdp-x11 | rdesktop <none><br>pn inputattach | joystick <none><br>pn ldm <none><br>pn libasound2-plugins <none><br>pn ltspfsd <none><br>ii netcat-openbsd [netcat] 1.130-3<br>ii netcat-traditional [netcat] 1.10-41+b1<br>ii ntpdate 1:4.2.8p10+dfsg-3<br>pn numlockx <none><br>pn pulseaudio <none><br>pn python-serial <none><br>ii rsyslog [system-log-daemon] 8.24.0-1<br>ii sane-utils 1.0.25-4.1<br>pn sdm-terminal | x-display-manager <none><br>pn sshfs <none><br>ii x11-xserver-utils 7.7+7+b1<br><br>-- Configuration Files:<br>/etc/ltsp/update-kernels.conf changed:<br>BOOT_METHODS="NFS"<br>CMDLINE_LINUX_DEFAULT="init=/sbin/init-ltsp quiet"<br>CMDLINE_NFS="root=/dev/nfs ip=dhcp boot=nfs NFSOPTS=\"-o timeo=100,retrans=360,hard,nointr,nocto,noacl,acregmin=600,acregmax=600,acdirmin=600,acdirmax=600\" vmwgfx.enable_fbdev=1 vga=0x317 cgroup_enable=memory swapaccount=1 net.ifnames=0"<br>CMDLINE_NBD="root=/dev/nbd0"<br>CMDLINE_AOE="root=/dev/etherd/e0.0"<br>KERNEL_NAMES='s/\(vmlinu[xz]-\)\([^-]*-[^-]*-\)\(.*\)/& \1 \2 \3/p'<br>INITRD_NAME='s/vmlinu[xz]/initrd.img/p'<br>KERNEL_PREFIX="vmlinu[z|x]-*"<br>KERNEL_SUFFIX=""<br>LIST_KERNELS_64="amd64"<br>LIST_KERNELS_PAE="686-pae 686-bigmem 686"<br>LIST_KERNELS_32="586 486 686"<br>IPAPPEND=2<br><br><br>-- debconf information:<br> ltsp-client/abort-installation:<br><br>-- debsums errors found:<br>debsums: changed file /sbin/init-ltsp (from ltsp-client-core package)<br>debsums: changed file /usr/share/initramfs-tools/scripts/init-premount/udhcp (from ltsp-client-core package)<br>debsums: changed file /usr/share/ltsp/init-ltsp.d/05-getltsconffile (from ltsp-client-core package)<br>debsums: changed file /usr/share/ltsp/init-ltsp.d/09-hostname (from ltsp-client-core package)<br>debsums: changed file /usr/share/ltsp/init-ltsp.d/50-disable-cronjobs (from ltsp-client-core package)<br></div></div></body></html>