The workaround as suggested it to use gssproxy
Unfortunately that also has a bug
https://bugs.launchpad.net/ubuntu/+source/gssproxy/+bug/1788459
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Manually compiling and installing the latest version of gssproxy did
solve the issue for me
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Title:
kernel soft lockup on nfs server when using
Why not use gss-proxy instead of rpc.svcgssd for NFS also in Ubuntu,
like other distress do?
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Title:
kernel soft lockup on nfs server when using
@urraca: I don't believe they're directly related. There were no BUGs
reported on that bug, and the issues on that bug are already fixed.
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Title:
@sforshee: before I open another bug, could you have a quick look at
1650336 (comment #10) and check if that might be related (it does smell
like it big time really...)?
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N.B. that according to the changelog of the 4.4.0-70 kernel package, the patch
has only been applied to -67 (thus effectively to -70)!
We'll have to re-try if that one makes our environment stable... :/
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@urraca: I suspect that what you're seeing is not the same problem as
the original report. Please file a new bug against the linux package and
include the data from comment #8.
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Well, we were hoping that 4.4.0-66 would fix the issue, as
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1650336 looked
pretty similar (and would have made sense).
Nastily, also patched and rebooted servers crash on us randomly.
This is getting urgent, as 12.04 is running out of support
Any update on this?
We have reduced the # of assigned groups per user to a sane level (~7) and
still see random crashes (4 since last Saturday).
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Not 100% sure if we're seeing the same bug (we use plain Kerberos, no AD
or Samba involved). However, since we started rolling out 14.04 and
16.04 in bigger numbers, we get literally hundreds of BUG messages (see
below) and a few kernel panics a week (console output showing among
other "oops_end"
** Changed in: nfs-utils (Ubuntu)
Importance: Undecided => Medium
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Title:
kernel soft lockup on nfs server when using a kerberos mount
To
This problem is still present in Ubuntu 16.04:
# Linux version 4.4.0-36-generic (buildd@lcy01-01) (gcc version 5.4.0 20160609
(Ubuntu 5.4.0-6ubuntu1~16.04.2) ) #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016
The workaround from comment #2 (disable PAC) still works
dmesg output:
[349643.292059] []
Hello,
For me, the problem is solved with downgrade my kernel to 12.04
"standard" kernel (Linux xxx 3.2.0-99-generic #139-Ubuntu) and delete
HWE. The problem is not reappeared since my change 3 weeks ago with 700
users.
Best regards
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hello,
Similar bug here with
Linux xxx 3.19.0-51-generic #58~14.04.1-Ubuntu SMP Fri Feb 26 22:02:58
UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Best regards
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Hello, I have a server in 12.04.5 LTS with kernel 3.13.0-74 (HWE) and packages
nfs-common in version 1:1.2.5-3ubuntu3.2 and nfs-kernel-server in version
1:1.2.5-3ubuntu3.2
I have the same problem. I tested today with the new version of kernel
3.13.0-76, I have always the problem of CPU stuck
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nfs-utils (Ubuntu)
Status: New => Confirmed
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Title:
I worked around this by setting NO_AUTH_DATA_REQUIRED on the
userAccountControl attribute in ldap for the server account to prevent
the PAC from being added to the kerberos ticket. I guess maybe when
svcgssd gets a kerberos ticket that is too large it gets unhappy and
stuck in a loop?
A few
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