This bug was fixed in the package linux-hwe - 5.3.0-66.60
---------------
linux-hwe (5.3.0-66.60) bionic; urgency=medium
* bionic/linux-hwe: 5.3.0-66.60 -proposed tracker (LP: #1891053)
* ipsec: policy priority management is broken (LP: #1890796)
- xfrm: policy: match with both mark and mask on user interfaces
* cgroup refcount is bogus when cgroup_sk_alloc is disabled (LP: #1886860)
- cgroup: fix cgroup_sk_alloc() for sk_clone_lock()
- cgroup: Fix sock_cgroup_data on big-endian.
-- Stefan Bader <stefan.ba...@canonical.com> Tue, 11 Aug 2020 09:22:54
+0200
** Changed in: linux-hwe (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** Changed in: linux (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1890796
Title:
ipsec: policy priority management is broken
Status in linux package in Ubuntu:
Fix Released
Status in linux-hwe package in Ubuntu:
Invalid
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Xenial:
Fix Released
Status in linux-hwe source package in Xenial:
Invalid
Status in linux-oem-5.6 source package in Xenial:
Invalid
Status in linux source package in Bionic:
Fix Committed
Status in linux-hwe source package in Bionic:
Fix Released
Status in linux-oem-5.6 source package in Bionic:
Invalid
Status in linux source package in Focal:
Fix Released
Status in linux-hwe source package in Focal:
Invalid
Status in linux-oem-5.6 source package in Focal:
Fix Released
Bug description:
[Impact]
When the user tries to update the priority field of a SP, the SP is
not updated *AND* a new SP is created. This results to a broken IPsec
configuration.
This problem has been fixed in the upstream commit 4f47e8ab6ab7 ("xfrm:
policy: match with both mark and mask on user interfaces"):
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f47e8ab6ab7
[Test Case]
root@dut-vm:~# uname -a
Linux dut-vm 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
root@dut-vm:~# ip xfrm policy flush
root@dut-vm:~# ip xfrm policy
root@dut-vm:~# ip xfrm policy add src 1.1.1.1/24 dst 2.2.2.2/24 proto tcp dir
in action allow priority 9 tmpl src 3.3.3.3 dst 4.4.4.4 proto esp mode tunnel
reqid 1
root@dut-vm:~# ip xfrm policy
src 1.1.1.1/24 dst 2.2.2.2/24 proto tcp
dir in priority 9
tmpl src 3.3.3.3 dst 4.4.4.4
proto esp reqid 1 mode tunnel
root@dut-vm:~# ip xfrm policy update src 1.1.1.1/24 dst 2.2.2.2/24 proto tcp
dir in priority 5 tmpl src 3.3.3.3 dst 4.4.4.4 proto esp mode tunnel reqid 1
root@dut-vm:~# ip xfrm policy
src 1.1.1.1/24 dst 2.2.2.2/24 proto tcp
dir in priority 5
tmpl src 3.3.3.3 dst 4.4.4.4
proto esp reqid 1 mode tunnel
src 1.1.1.1/24 dst 2.2.2.2/24 proto tcp
dir in priority 9
tmpl src 3.3.3.3 dst 4.4.4.4
proto esp reqid 1 mode tunnel
root@dut-vm:~#
=> Now, there is 2 SP instead of 1.
[Regression Potential]
The patch affects the xfrm stack only. Thus, the potential regressions
are limited to this area.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1890796/+subscriptions
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