Public bug reported:
StrongSwan with GCM and large packet sizes produces unstable behavior when used
in Linux native environment.
---uname output---
Linux ubu01 4.15.0-42-generic #45-Ubuntu SMP Thu Nov 15 19:29:11 UTC 2018 s390x
s390x s390x GNU/Linux
Machine Type = 3906 / M04 (z14), LPAR (dedicated)
---Debugger---
A debugger is not configured
---Steps to Reproduce---
On two separate machines (Linux native), install StrongSwan and on both
machines, configure the encryption with aes128gcm8 for IPsec.
Then run the following command from one of the machine:
```
$# ping <other_machine_ip> -s 1024
```
Small packet sizes are working as expected. However, anything large (around
1024 bytes or more) are sometimes returning wrong values, or the packets are
getting lost. This problem does not occur for ciphers not involving GCM.
Userspace tool common name: StrongSwan
The userspace tool has the following bit modes: both
Userspace package: StrongSwan
Userspace tool obtained from project website: na
-Attach ltrace and strace of userspace application.
** Affects: ubuntu-z-systems
Importance: High
Assignee: Canonical Server Team (canonical-server)
Status: Triaged
** Affects: strongswan (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-177435 severity-high
targetmilestone-inin18041
** Tags added: architecture-s39064 bugnameltc-177435 severity-high
targetmilestone-inin18041
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https://bugs.launchpad.net/bugs/1828035
Title:
StrongSwan with GCM and large packet sizes produces unstable behavior
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