** Tags added: cscc
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https://bugs.launchpad.net/bugs/1729337
Title:
CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same config
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** Changed in: linux (Ubuntu Zesty)
Status: In Progress => Fix Released
** Changed in: linux (Ubuntu Trusty)
Status: In Progress => Fix Released
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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I'm happy to create a new bug report for this, however before I do I
wanted to follow up here first. I've been working on a bionic VM
template this week and the issue has resurfaced. Client (18.04) reboots
daily at 3:00 a.m., and somewhere between 30 minutes and 2 hours later,
the CIFS mount
This bug was fixed in the package linux - 4.4.0-103.126
---
linux (4.4.0-103.126) xenial; urgency=low
* linux: 4.4.0-103.126 -proposed tracker (LP: #1736181)
* CVE-2017-1000405
- mm, thp: Do not make page table dirty unconditionally in touch_p[mu]d()
* CVE-2017-16939
Hi @FedeX and @jwhardcastle,
Could you please verify if the Xenial kernel currently in -proposed
fixes the issue?
Thank you.
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Title:
CIFS
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag
I've done further tests, and found that with kernels 3.13.0-128,
3.13.0-133, 3.13.0-134 and 3.13.0-135, mounting cifs folder using
vers=3.0 (with no security mode manually set, ie: no option sec=ntlmsspi
used) sometimes work and sometimes it doesn't, unfortunately I can't
figure out what is
Ok this is very weird, it worked fine after the first reboot, but then I
booted once again with 3.13.0-135-generic #184-Ubuntu just to confirm
that the same mount options where failing (which they did). Then I
rebooted again to 3.13.0-134-generic #183~lp1729337Commit5165d87e224 and
the mount it's
Hi Joseph,
It seems to be working fine with this kernel, is there any particular
info you would like me to provide?
Cheers
FedeX
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Title:
CIFS
Hi Joseph,
Thanks for that
No worries, I'll test this now and report back to you
Cheers
FedeX
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https://bugs.launchpad.net/bugs/1729337
Title:
CIFS errors on 4.4.0-98, but not on
** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
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Title:
CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same
Only the linux-image and linux-image-extra .deb packages need to be
installed.
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Title:
CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same
Hi @jsalisbury,
Sorry been flat out with work!
Sure can help with that, just to double check please, do I need to
download and install all 8 deb packages in?:
http://kernel.ubuntu.com/~jsalisbury/lp1729337
Because I don't think I've ever used/installed the cloud-tools in any of
my servers
@FedeX
It's interesting that reverting to 3.13.0-133 fixed the issue since
there are no cifs related change from 3.13.0-133 to 3.13.0-135.
Also, according to upstream kernel bugzilla 197311, it's mentioned that this
was introduced by:
0603c96f upstream ("SMB: Validate negotiate (to protect
** Changed in: linux (Ubuntu Artful)
Status: In Progress => Fix Committed
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Title:
CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same
** Description changed:
- We have a cluster of servers that applied a security update overnight
- and were unable to mount CIFS shares after upgrading to 4.4.0-98. The
- same machines on 4.4.0-97 were fine the night before, and are fine after
- downgrading. The only error message CIFS would
That did it for me on Xenial.
root@client:~# uname -a
Linux client 4.4.0-98-generic #121~lp1729337 SMP Thu Nov 2 20:53:20 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
root@client:~# mount | grep share
//server/share on /mnt/share type cifs
With all these test kernels, be sure to install both the linux-image and
linux-image-extra .deb packages.
Thanks in advance!
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Title:
CIFS
I also built a Trusty test kernel with commit 4587eee. It can be downloaded
from:
http://kernel.ubuntu.com/~jsalisbury/lp1729337/trusty
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Title:
I built Xenial, Zesty and Artful test kernels with the following commit:
4587eee SMB3: Validate negotiate request must always be signed
The test kernels can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1729337/
Can you test these kernels and see if that commit resolves this bug?
** Also affects: linux (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Zesty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
FWIW I can confirm that adding sec=ntlmsspi fixed our issue with
4.4.0-98.
root@client:~# mount | grep share
//server/share on /mnt/share type cifs
I've found another interesting fact by searching the mount.cifs man
page, quote:
sec=
Security mode. Allowed values are:
· none - attempt to connection as a null user (no name)
· krb5 - Use Kerberos version 5 authentication
· krb5i - Use
Here are more details of two Ubuntu servers where I'm experiencing this
issue:
uname -a
Linux 3.13.0-135-generic #184-Ubuntu SMP Wed Oct 18 11:55:51 UTC 2017 x86_64
x86_64 x86_64 GNU/Linux
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:Ubuntu 14.04.5 LTS
Confirmed that 4.14-rc7 works fine, no error.
root@cf03:~# uname -a
Linux client 4.14.0-041400rc7-generic #201710292231 SMP Sun Oct 29 22:32:07 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
root@client:~# mount
... snip ...
//server/share on /mnt/share type cifs
Hi,
Can confirm I'm having the same issue with multiple servers after latest
updates:
Ubuntu 16.04.3 LTS (GNU/Linux 4.4.0-98-generic x86_64)
Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-135-generic x86_64)
Also as a workaround changing from vers=3.0 to vers=2.1 fix the issue
Thanks
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Thanks for testing that. We can next perform a kernel bisect to
identify the commit that introduced the regression.
First it would be good to know if this bug is already fixed upstream.
If it is, we can perform a "Reverse" bisect to identify the commit that
fixes the bug. Can you test
Sorry, it doesn't seem to have fixed the issue. I installed the image,
extras, and both headers packages. No cloud or tools (they aren't
installed in our system usually).
root@client:~# uname -a
Linux client 4.4.0-98-generic #121~lp1729337 SMP Wed Nov 1 14:29:16 UTC 2017
x86_64 x86_64 x86_64
I built a 16.04 test kernel with the folloiwng commit reverted:
f5c4ba816315 ("cifs: release auth_key.response for reconnect.")
This was the only cifs change between -97 and -98. The test kernel can
be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1729337/
Can you test this kernel
@jsalisbury I've got one machine from our cluster that's not been
downgraded so I can do any debugging or provide any additional
information that you might need. Let me know if there's anything I can
do to help.
Thanks.
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** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => Incomplete
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => High
**
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