I ran into this over the past few days, and the zfs-dkms install via
recovery also worked for me, though be warned that you will need to take
careful steps with secureboot to enrol the MOK that this generates for
you.
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Public bug reported:
Jul 20 14:40:23 anonster kernel: [ 1716.692818] mlx5_core :03:00.0:
assert_var[0] 0x
Jul 20 14:40:23 anonster kernel: [ 1716.698541] mlx5_core :03:00.0:
assert_var[1] 0x
Jul 20 14:40:23 anonster kernel: [ 1716.704240] mlx5_core :03:00.0:
** Description changed:
- A race condition error related to the "tiocspgrp()" function
- (drivers/tty/tty_jobctrl.c) can be exploited to trigger a use-after-free
- and subsequently gain elevated privileges.
+ CVE 2020-29661 https://bugs.launchpad.net/bugs/cve/2020-29661
- The vulnerability is
Looking at bug#1863261 the depmod error may be a red herring.
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https://bugs.launchpad.net/bugs/1865182
Title:
lookup_builtin_file() could not open builtin file
And from MAAS boot it seems like this was running the right kernel:
[0.00] Linux version 5.4.0-14-generic (buildd@lgw01-amd64-034) (gcc
version 9.2.1 20200203 (Ubuntu 9.2.1-28ubuntu1)) #17-Ubuntu SMP Thu Feb 6
22:47:59 UTC 2020 (Ubuntu 5.4.0-14.17-generic 5.4.18)
[0.00] Command
It's still happening:
Mar 2 10:05:37 negret cloud-init[2450]: depmod: ERROR:
../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin
file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'
-rw-r--r-- 1 root root 10257 Mar 1 22:11
/lib/modules/5.4.0-14-generic/modules.builtin.bin
Public bug reported:
This error did not take place on my laptop (where I ran apport, for
convenience), but on a server being deployed to Focal with MAAS.
The initial deployment boot worked fine, and that was lucky as it meant
I could ssh in and tail /var/log/syslog while it went through the
I managed to identify the problem as hardware, as it coincides with
physical stresses on the laptop. When I plugged in external peripherals
and left the laptop itself alone, the problem did not reoccur.
You can close this bug.
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Well of course right after I file this, it hangs. So this may not be
the kernel after all.
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https://bugs.launchpad.net/bugs/1745768
Title:
system hangs within 10 minutes
Public bug reported:
I cannot run for very long under normal operational load using linux-
image-4.13.0-32-generic without a complete system freeze (mouse no
longer moves, keyboard no longer responsive). I have worked around this
by booting back into linux-image-4.13.0-31-generic which is
This inactivity is not Chris Stratford's fault.
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https://bugs.launchpad.net/bugs/1571535
Title:
iwlwifi restarts randomly in xenial
Status in linux package in Ubuntu:
This problem has caused more serious damage recently. When nbd dies and
printk()s like mad, the serial console is not fast enough to display it.
The kernel keeps allocating buffer space for serial output, which we see
as 13G kmalloc-256 or kmalloc-512 kernel threads.
Eventually the OOMkiller
This memory leak we have so far only seen on arm64, to be clear.
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https://bugs.launchpad.net/bugs/1505564
Title:
Soft lockup with "block nbdX: Attempted send on closed
crap, I tried to run it on the right box and copy it over.
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https://bugs.launchpad.net/bugs/1506543
Title:
openstack instances on arm64 lock up on polling and other
Public bug reported:
While working on deploying arm64 builders in openstack, we found that it
was pretty easy to wedge them. Many hang just running ntpdate right off
the bat.
William Grant had more direct tests he did, but upgrading from 3.13 to
3.19 didn't seem to fix things.
** Affects:
Public bug reported:
I filed this bug against linux-image-3.19.0-29-generic and hope that it
has attached everything relevant.
With linux-image-3.19.0-29-generic I can only run my thinkpad X240 for a
few hours before I invariably trip over this bug and cause it to hang,
heating up and driving
I'm curious if this is related to bug #1495696
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https://bugs.launchpad.net/bugs/1498387
Title:
system hangs and CPU heats up in -29 but not -28
Status in linux package in
Thanks. It does indeed look like this got rid of the lockups in dmesg.
Thanks!
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https://bugs.launchpad.net/bugs/1357295
Title:
bcache_writebac blocks and goes silent on
What's the best way for us to test this fix in Trusty right now?
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https://bugs.launchpad.net/bugs/1357295
Title:
bcache_writebac blocks and goes silent on trusty kernel
Public bug reported:
We regularly use bcache to use SSDs as an extra block cache layer for
performance on large working sets (archive mirrors, large databases,
etc). Until now we have had good success with bcache on precise LTS
with HWE kernels up to Saucy's.
Unfortunately when we mount a
Joseph, your text says the latest v3.13 kernel, but the link takes me to
v3.14. Is that correct?
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https://bugs.launchpad.net/bugs/1291371
Title:
thinkpad screen dims
Linux vezza 3.14.0-031400rc6-generic #201403100035 SMP Mon Mar 10
04:36:54 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
The bug seems to be fixed with this kernel.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Tags added: kernel-fixed-upstream
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