** Changed in: linux (Ubuntu)
Milestone: None => maverick-alpha-3
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Summary changed:
- Unable to mount NFS shares
+ Unable to mount NFSv4 shares due to Yama
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Unable to mount NFSv4 shares due to Yama
https://bugs.launchpad.
> Thanks again for the report and helping to debug it!
no problem
glad I could help
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Okay, I've got this locally reproduced now. Followed
https://help.ubuntu.com/community/NFSv4Howto except for the maverick
client, which needs idmapd started explicitly after editing /etc/default
/nfs-common. Once that'd one, and using server bind mount, I get the
same errors.
i.e. server filesys
Yeah, that's the sticky bit alright. But that NFS mount isn't a
symlink, so I think this is a kernel bug regardless. I will try to get
this reproduced and a fix tested. I think I know what's wrong, but I'll
need to double-check. Thanks for helping me debug this!
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Unable to mount NFS shares
It's been years since I set the NFS up, so I'm a little rusty
but re-reading up on it, seems a root owned export dir with sticky bit combined
with the root_squash is a security feature
disallowing client root from having root priv's on the server
setting the top-level export dir as root-owned and
drwxrwxrwt 9 tony tony 4096 2010-06-29 03:58 /nfs4exports
I see a 't' at the end of that
this the sticky bit?
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ubunt
And on the server, what does "ls -lda /nfs4exports" show? I think
that's the only thing left I haven't checked. NFSv4's namespace
semantics are different from older NFS, so I hadn't considered asking
about that yet.
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Unable to mount NFS shares
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You receiv
** Attachment added: "etc_exports"
http://launchpadlibrarian.net/51883323/etc_exports
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Server is Lucid
only my desktop is maverick
** Attachment added: "showmount"
http://launchpadlibrarian.net/51883320/showmount
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Is your server running Maverick too? What does "showmount -e tony-
server" show from the client? And what are the contents of tony-
server's /etc/exports file?
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The warning you saw "non-matching-uid symlink following attempted in
sticky world-writable directory by mount.nfs4 (fsuid 0 != 1000)" should
only happen in the case where a symlink is being following in a
directory that is world-writable and sticky ("+t"). None of your
directories seem to have tha
What exactly do you mean by "sticky"?
drwxr-xr-x 5 root root 4096 2009-10-20 02:18 /home
drwxr--r-- 181 tony tony 16384 2010-07-13 12:27 /home/tony
drwxr-xr-x 6 root root 4096 2010-06-29 04:01 /media
drwxr-xr-x 7 root root 4096 2010-06-29 04:02 /media/raid5
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Unable to mount NFS shares
Can you show the output of:
ls -lad /home /home/tony /media /media/raid5
Something in these paths must be sticky (when, in theory, it should not
be).
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oops,
missed one ls -lad
drwxr-xr-x 18 tony tony 4096 2010-05-07 01:53 /home/tony/scripts/
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ls -lad done on client share mountpoints (NFS shares mounted)
** Attachment added: "ls-lad"
http://launchpadlibrarian.net/51793524/ls-lad
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** Attachment added: "fstab"
http://launchpadlibrarian.net/51793320/fstab
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This is a bit strange -- are any of those directories sticky? And where
is a symlink involved? Can you attach your client's /etc/fstab and the
"ls -lad" output of the destination mount points?
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Kees Cook (kees)
** Changed in: linux (Ub
Came across this as well
http://lwn.net/Articles/393012/
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https
This is an issue with the Ubuntu kernel then, not with nfs-utils;
reassigning. It's also not present in the upstream kernel, so marking
that task invalid.
** Package changed: nfs-utils (Ubuntu) => linux (Ubuntu)
** Changed in: linux
Status: New => Invalid
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Unable to mount NFS shares
h
** Also affects: linux
Importance: Undecided
Status: New
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Solved by trial & error
(this always happens with bugs I file)
Linux 2.6.35 changes how symlinks (and presumably bind mounts) work
detailed here
http://lkml.org/lkml/2010/5/30/144
Solution
change owner of my server's /nfs4exports directory from root to the primary
user (UID 1000)
Bug still stan
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/51748516/Dependencies.txt
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