SUSE Support

Here When You Need Us

umount NFS share fails with SIGABRT when root is in > 16 groups

This document (7008219) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11 Service Pack 1


If root is in more than 16 groups, unmounting NFS mounts will fail. After "umount /nfs-share" the nfs mount remains mounted and "mount" will show it in the mount list.

A strace ('strace -v -o umount.strace umount /nfs-share') of the umount documents the failure with the following error:

clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb76b4bb8) = 5009
wait4(-1, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGABRT}], 0, NULL) = 5009
--- SIGCHLD (Child exited) @ 0 (0) ---

The reason of the problem is described here:


The nfs-client update to version -1.2.1-2.12.1 includes the patch correcting the problem.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7008219
  • Creation Date: 28-Mar-2011
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

< Back to Support Search

For questions or concerns with the SUSE Knowledgebase please contact: tidfeedback[at]

SUSE Support Forums

Get your questions answered by experienced Sys Ops or interact with other SUSE community experts.

Support Resources

Learn how to get the most from the technical support you receive with your SUSE Subscription, Premium Support, Academic Program, or Partner Program.

Open an Incident

Open an incident with SUSE Technical Support, manage your subscriptions, download patches, or manage user access.