This bug was fixed in the package linux - 5.4.0-42.46
---
linux (5.4.0-42.46) focal; urgency=medium
* focal/linux: 5.4.0-42.46 -proposed tracker (LP: #1887069)
* linux 4.15.0-109-generic network DoS regression vs -108 (LP: #1886668)
- SAUCE: Revert "netprio_cgroup: Fix
This bug was fixed in the package linux - 5.3.0-64.58
---
linux (5.3.0-64.58) eoan; urgency=medium
* eoan/linux: 5.3.0-64.58 -proposed tracker (LP: #1887088)
* linux 4.15.0-109-generic network DoS regression vs -108 (LP: #1886668)
- SAUCE: Revert "netprio_cgroup: Fix
I was also affected in bionic (linux-image-5.3.0-62-generic), but (since
today?) there is an update available: linux-image-5.4.0-42-generic
(5.4.0-42.46~18.04.1)
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I think this is needed in linux-generic-hwe-18.04.
We get similar crashes with 5.3.0.62
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https://bugs.launchpad.net/bugs/1886668
Title:
linux 4.15.0-109-generic network DoS regression
This bug was fixed in the package linux - 5.4.0-42.46
---
linux (5.4.0-42.46) focal; urgency=medium
* focal/linux: 5.4.0-42.46 -proposed tracker (LP: #1887069)
* linux 4.15.0-109-generic network DoS regression vs -108 (LP: #1886668)
- SAUCE: Revert "netprio_cgroup: Fix
This bug was fixed in the package linux - 4.15.0-111.112
---
linux (4.15.0-111.112) bionic; urgency=medium
* bionic/linux: 4.15.0-111.112 -proposed tracker (LP: #1886999)
* Bionic update: upstream stable patchset 2020-05-07 (LP: #1877461)
- SAUCE: mlxsw: Add missmerged
Concur. Previously in bionic 4.15.0-109 I would get this within 5 or 6
hours *max* (often much less) with 4.15.0-111 I'm at about 24 hours so
far and no sign. Looks good.
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I confirm that I can't reproduce the bug with the reproducer from
comment #7 with bionic/linux 4.15.0-111.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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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-
eoan' to 'verification-done-eoan'. If the problem still exists, change
the tag
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
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-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Eoan)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Focal)
Status: In Progress => Fix Committed
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https://launchpad.net/~cascardo/+archive/ubuntu/ppa/+sourcepub/11419106
/+listing-archive-extra
So, this package on my ppa is built for bionic, but should work on other
series too.
It has a service that will call a wrapper that will start the reproducer
and reboot. The reason for the reboot is
** Tags added: patch
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https://bugs.launchpad.net/bugs/1886668
Title:
linux 4.15.0-109-generic network DoS regression vs -108
To manage notifications about this bug go to:
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Assignee: Thadeu Lima de Souza Cascardo (cascardo)
Status: Invalid
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1886668
Title:
linux 4.15.0-109-generic network DoS regression vs -108
Test kernels at https://people.canonical.com/~cascardo/lp1886668/.
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https://bugs.launchpad.net/bugs/1886668
Title:
linux 4.15.0-109-generic network DoS regression vs -108
To manage
** Description changed:
[Impact]
On systems using cgroups and sockets extensively, like docker, kubernetes,
lxd, libvirt, a crash might happen when using linux 4.15.0-109-generic.
[Fix]
Revert the patch that disables sk_alloc cgroup refcounting when tasks are
added to net_prio
Bugs are LP#1886860 and LP#1886859.
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https://bugs.launchpad.net/bugs/1886668
Title:
linux 4.15.0-109-generic network DoS regression vs -108
To manage notifications about this bug go
** Description changed:
+ [Impact]
+ On systems using cgroups and sockets extensively, like docker, kubernetes,
lxd, libvirt, a crash might happen when using linux 4.15.0-109-generic.
+
+ [Fix]
+ Revert the patch that disables sk_alloc cgroup refcounting when tasks are
added to net_prio
This is caused by net_cls and net_prio cgroups disabling cgroup BPF and
causing it to stop refcounting when allocating new sockets. Releasing those
sockets will cause the refcount to go negative, leading to the potential
use-after-free.
Though this revert won't prevent the issue from happening as
** Information type changed from Private Security to Public Security
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Title:
linux 4.15.0-109-generic network DoS regression vs -108
To manage
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