** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Seth Forshee (sforshee)
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I have a fix, but I will want to run it by upstream before we apply it
to be sure we aren't opening up any security issues. In the meantime
I've put up a test build, please give it a try and verify that the uuid-
runtime upgrade can be successfully installed.
Seth, is this for the host or the container? Either way, I'm not running
4.2..
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https://bugs.launchpad.net/bugs/1498162
Title:
unable to make backup link
** No longer affects: util-linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1498162
Title:
unable to make backup link of `./usr/sbin/uuidd' before
I've seen this pretty consistently too across a few hundred containers.
My guess so far was that it had to do with filesystem capabilities or
something similar.
So things are set properly when the image is unpacked by real root on
the host, but the extended attribute then can't be modified from
It's the setuid and setgid bits with user namespace.
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Marking confirmed based on stgraber's comment.
** Changed in: util-linux (Ubuntu)
Status: Incomplete => Confirmed
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You can work around this by doing
echo 0 | sudo tee -a /proc/sys/fs/protected_hardlinks
on the host.
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Title:
Yes, seems to be a broken filesystem. What type of filesystem is this?
Check dmesg/syslog for errors. Also can you touch somenewfile in that
directory?
Unless... do you have SELinux enabled or something?
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root@devel:~# ls -ld /usr/sbin/
drwxr-xr-x 2 root root 4096 Sep 24 18:11 /usr/sbin/
root@devel:~# ls -l /usr/sbin/uuidd*
-rwsr-sr-x 1 libuuid libuuid 18904 Aug 5 02:20 /usr/sbin/uuidd
** Changed in: util-linux (Ubuntu)
Status: Incomplete => New
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That sounds a bit like fs corruption then. Can you please do
cd /usr/bin; sudo strace -fvvs1024 -o /tmp/trace ln uuidd uuidd.bak
and attach /tmp/trace? I guess it really fails in link(2) with EPERM
("old name is a directory") or EACCESS ("new path directory is not
writable"), but let's make
chris@devel:~⟫ sudo -s
root@devel:~# cd /usr/sbin
root@devel:/usr/sbin# ln uuidd uuidd.bak
ln: failed to create hard link ‘uuidd.bak’ => ‘uuidd’: Operation not permitted
** Changed in: util-linux (Ubuntu)
Status: Incomplete => New
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Is there maybe already a /usr/sbin/uuidd.bak with read-only permissions?
Or a non-writable /usr/sbin? Please show the output of
ls -ld /usr/sbin/
ls -l /usr/sbin/uuidd*
** Changed in: util-linux (Ubuntu)
Status: New => Fix Released
** Changed in: util-linux (Ubuntu)
Status:
That is a very strange error. What if you try this:
sudo -s
cd /usr/sbin
ln uuidd uuidd.bak
rm uuidd.bak
** Changed in: util-linux (Ubuntu)
Status: New => Incomplete
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