Hi Alex,
can you open a new bug to track this issue with command "ubuntu-bug linux"?
Thank you!
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https://bugs.launchpad.net/bugs/1886277
Title:
Regression on NFS: unable
Seems a same bug on Ubuntu 20.04 kernel 5.4.0-52. The bug reproduces for me
only under high load of CPU(for example, java compilation process)
-
[10798.058030] bpfilter: Loaded bpfilter_umh pid 17193
[10798.058119] Started bpfilter
[14269.588116] BUG: unable to handle page
5.4.0-48-generic seems to have fixed this problem for me, thanks!
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Title:
Regression on NFS: unable to handle page fault in
mainline 5.4.60-050460-generic #202008210836 did indeed fix the setup
for me, I just forget to get back to you guys here.
Hello Martin,
It looks like the fix had not been included in the 5.4.0-47 release, but only
in the following 5.4.0-48 release.
Have you had the time to update to the updated
This bug was fixed in the package linux - 5.4.0-48.52
---
linux (5.4.0-48.52) focal; urgency=medium
* focal/linux: 5.4.0-48.52 -proposed tracker (LP: #1894654)
* mm/slub kernel oops on focal kernel 5.4.0-45 (LP: #1895109)
- SAUCE: Revert "mm/slub: fix a memory leak in
Hi all,
after installation of 5.4.0-47 I also got the impression that the bug was gone
and was happy.
Until now ... I'm getting this type of data corruption with the recent main
focal kernel:
Linux 5.4.0-47-generic #51-Ubuntu SMP Fri Sep 4 19:50:52 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
This bug was fixed in the package linux - 5.8.0-18.19
---
linux (5.8.0-18.19) groovy; urgency=medium
* groovy/linux: 5.8.0-18.19 -proposed tracker (LP: #1893047)
* Packaging resync (LP: #1786013)
- update dkms package versions
* Groovy update: v5.8.4 upstream stable
I tested kernel 5.4.0-46-generic #50 from focal-proposed. This version
seems to fix the problem, I could not reproduce it any more.
** Tags removed: verification-needed-focal
** Tags added: verification-done-focal
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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-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag
A fix mentioning this bug report has been applied upstream and to
mainline stable linux-5.4.y and backported to focal/linux as part of our
regular stable backports (bug 1892417):
SUNRPC: Fix ("SUNRPC: Add "@len" parameter to gss_unwrap()")
That is great to hear @marianrh!
I switched the entire workforce to the 5.8 kernel after the bug was
introduced on those machines that are still on 18.04 and have HWE
installed. Now I installed two machines for testing purposes with Ubuntu
20.04 and the problem reappeared quite quickly, so I put
I can confirm that 5.4.59-050459-generic #202008190333 seems to work, I
could not reproduce the problem there.
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Title:
Regression
Yesterdays new mainline Kernel v5.4.59 works for me.
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4.59/
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.4.59=18d1bb4973644bb14d1363af07665f28d468c5ec
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For what it is worth, I also have the same enncryption aes256-cts-hmac-
sha1-96 (and same problem). The tickets come from MIT Kerberos on
Ubuntu 18.04; the NFS servers are Ubuntu 18.04 using krb5p security
option.
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The enctypes according to klist are: Etype (skey, tkt): aes256-cts-hmac-
sha1-96, aes256-cts-hmac-sha1-96. The kerberos tickets come from Active
Directory server and NFS servers are NetApps, if that matters.
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This also affects Ubuntu Bionic, if linux-generic-hwe-18.04 is
installed. The 4.15.0-112-generic works fine.
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Title:
Regression on
>From the patch author:
"Please ask what encryption type is in use. The
kerberos_v1 enctypes might exercise a code path I wasn't able to
test."
"Have the testers enable memory debugging : KASAN or SLUB debugging
might provide more information. I might have some time later this week
to try
5.5.19 looks good for me. I have home over nfs4+krb5p, so the original bug
triggers immediately after login and the DE locks up.
The problem mentioned in comment #31 is not really reproducible, I only
encountered it on the first few boots on Monday, the patched 5.4.0-40 has been
stable
The patch author wants to know if upstream stable 5.5 has the same issue.
The kernel can be found here:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.5.19/
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https://github.com/torvalds/linux/commit/89a3c9f5b9f0bcaa9aea3e8b2a616fcaea9aad78
SUNRPC: Properly set the @Subbuf parameter of xdr_buf_subsegment()
When I apply that patch to 5.4.0-40-generic the original bug disappears,
however I sometimes still get:
[Mo Jul 13 20:22:53 2020] BUG: unable to
I can confirm that 5.8.0-050800-generic does fix the bug. I also tested
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4.51/ and the problem
is still present in that version.
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Can you please also test upstream 5.4:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4.51/
Hopefully we don't need to do any backport, there are a hundred
commits...
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I downloaded and installed the packages from https://kernel.ubuntu.com
/~kernel-ppa/mainline/v5.8-rc4/amd64/ and tested 5.8.0-050800-generic
#202007052030. I could not reproduce the problem in this version.
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Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc4/
If mainline kernel works, then we need to backport some commits to
filling gap between v5.4 and the offending commit.
If mainline kernel doesn't work, we need to raise the issue to upstream.
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Thanks for the advice for bisecting! I found the commits causing the
problem:
After bb4fb62a863ea6131bdac77b21faa9444a605c58 (SUNRPC: Add "@len" parameter to
gss_unwrap()) NFS with Kerberos is completely broken:
$ mount -v /nfs/share
mount.nfs: trying text-based options
** Summary changed:
- unable to handle page fault in mempool_alloc_slab
+ Regression on NFS: unable to handle page fault in mempool_alloc_slab
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