Red Hat Bugzilla – Bug 374231
NFS shares broken
Last modified: 2008-05-14 11:20:05 EDT
Description of problem: Recent upgrade has broken client-side NFS mount. There is one NFS share with multiple exported subdirectories (/nfs). The top-level share works fine, but some of the subdirectories which are all explicitly listed in the server '/etc/exports' file fail. Trying to CD or LS results in: ls: cannot access /nfs/home: Invalid argument The only log file which seems to produce an error during this event is 'dmesg': SELinux: security_context_to_sid(****) failed for (dev 0:12, type nfs) errno=-22 Where **** is about 10 non-standard ASCII characters looking like symbols and question marks. The length of this string seems to vary. Upgrading today to the latest version of 'nfs-utils' and kernel seems to allow one out of four of my shares to work correctly, the 'rw' one (/nfs/tmp). Please let me know what other information I can provide. Version-Release number of selected component (if applicable): Linux 2.6.23.1-21.fc7 nfs-utils.x86_64 1:1.1.0-4.fc7 How reproducible: Not sure if it's configuration or what--it was working until now. My configuration is based on the 'fedorasolved.org' NFS tutorial.
Try turning "off" selinux (targeted/permissive). If that fixes it, obviously it's a selinux issue and some selinux tweaking will be required. See the many other selinux and nfs bugs here. Are you running NFSv3 or v4 for this client? If v4, make sure you're exporting dirs that all share the same dir root (fsid=0). The setup can be tricky.
Dan, does this look familiar?
I did not notice any SELinux alerts from the troubleshooter that appeared when I was having this problem (this machine has since moved off the network). There was just the 'security_context_to_sid(****)'. The random garbage in the alert string just sounded like a bug to me. It is NFSv4. I was exporting DIRS with the same root dir (fsid=0), although some of them were 'bind's of other directories. I still have other machines FC6 and FC7 on that network, and they seem fine. Should I close this bug since I'm no longer able to mount the server (which works) with the workstation machine (which has the problem)?
This sounds like a kernel problem.
Looks like the nfs clone mount problem. Eric has patches pending for SELinux and NFS to fix.
yeah, dupe of 245058
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closing as upstream since a fix was accepted into 2.6.25