Package: nfs-common Version: 1:1.3.4-2.5+b1 Severity: important Dear Maintainer,
please find my observations on a specific scenario of an NFS directory listings. I have to apologize that my possibilities to track down the actual source are quite limited. However, I could test the issue against different debian/ubuntu installations: NFS client systems tested: * debian testing (this system, up-to-date): fail * debian unstable (up-to-date): fail * ubuntu 1910 (up-to-date): ok NFS server * ubuntu LTS 18.04.4 (up-to-date) NFS setup (identical on all tested systems) * NFSv4 + kerberos/ldap What led up to the situation? * create empty directory /path/to/nfs/directory/testdirectory on an NFS share * within this directory, create 5 files or directories with total length of 173 .. 176 characters Example with sub-directories, total name length = 173 characters: user@nfs-server:~$ ls -la /path/to/nfs/directory/testdirectory drwxr-xr-x 7 user group 7 Feb 22 14:02 . drwxr-sr-x 9 user group 9 Feb 22 13:32 .. drwxr-xr-x 2 user group 2 Feb 22 13:16 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF drwxr-xr-x 2 user group 2 Feb 22 13:16 123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0 drwxr-xr-x 2 user group 2 Feb 22 13:17 23456789ABCDEF0123456789ABCDEF0123456789ABCDEF01 drwxr-xr-x 2 user group 2 Feb 22 13:17 3456789ABCDEF012 drwxr-xr-x 2 user group 2 Feb 22 13:26 456789ABCDEF0 Example with files, total name length = 176 characters: user@nfs-server:~$ ls -la /path/to/nfs/directory/testdirectory drwxr-xr-x 2 user group 7 Feb 22 13:32 . drwxr-sr-x 9 user group 9 Feb 22 13:32 .. -rw-r--r-- 1 user group 0 Feb 22 13:32 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF -rw-r--r-- 1 user group 0 Feb 22 13:32 123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0 -rw-r--r-- 1 user group 0 Feb 22 13:32 23456789ABCDEF0123456789ABCDEF0123456789ABCDEF01 -rw-r--r-- 1 user group 0 Feb 22 13:32 3456789ABCDEF012 -rw-r--r-- 1 user group 0 Feb 22 13:32 456789ABCDEF0123 What was the outcome of this action? * on debian testing and unstable NFS clients: user@nfs-client:~$ ls -la /path/to/nfs/directory/testdirectory ls: reading directory '/path/to/nfs/directory/testdirectory': Input/output error * on ubuntu NFS client: directory listing is fine What exactly did you do (or not do) that was effective (or ineffective)? * Vary file name lengths within 173 ... 176: still I/O errors * Vary file name lengths above 176 or below 173 characters: no error * Add/remove file/sub-directory and widely vary file name lengths: no error What outcome did you expect instead? * no I/O errors in all cases Log file content * dmesg: no related entries * syslog: no related entries * daemon.log: no related entries -- Package-specific info: -- rpcinfo -- program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper -- /etc/default/nfs-common -- NEED_STATD= STATDOPTS= NEED_IDMAPD= NEED_GSSD= -- /etc/idmapd.conf -- [General] Verbosity = 0 Pipefs-Directory = /run/rpc_pipefs [Mapping] Nobody-User = nobody Nobody-Group = nogroup -- /etc/fstab -- -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (800, 'testing'), (700, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 5.4.0-4-amd64 (SMP w/6 CPU cores) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages nfs-common depends on: ii adduser 3.118 ii keyutils 1.6.1-2 ii libc6 2.29-10 ii libcap2 1:2.32-1 ii libcom-err2 1.45.5-2 ii libdevmapper1.02.1 2:1.02.167-1 ii libevent-2.1-7 2.1.11-stable-1 ii libgssapi-krb5-2 1.17-6 ii libkeyutils1 1.6.1-2 ii libkrb5-3 1.17-6 ii libmount1 2.34-0.1 ii libnfsidmap2 0.25-5.1 ii libtirpc3 1.2.5-1 ii libwrap0 7.6.q-30 ii lsb-base 11.1.0 ii rpcbind 1.2.5-8 ii ucf 3.0038+nmu1 Versions of packages nfs-common recommends: ii python 2.7.17-2 Versions of packages nfs-common suggests: pn open-iscsi <none> pn watchdog <none> -- no debconf information