[Bug 2136820] Re: ubuntu_kselftests:_net/net:gre_gso.sh failing

This bug is awaiting verification that the linux-
nvidia-6.17/6.17.0-1008.8 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-noble-linux-nvidia-6.17' to
'verification-done-noble-linux-nvidia-6.17'. If the problem still
exists, change the tag 'verification-needed-noble-linux-nvidia-6.17' to
'verification-failed-noble-linux-nvidia-6.17'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-nvidia-6.17-v2 verification-needed-noble-linux-nvidia-6.17

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https://bugs.launchpad.net/bugs/2136820

Title:
ubuntu_kselftests:_net/net:gre_gso.sh failing

Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
New
Status in linux source package in Jammy:
Fix Committed
Status in linux source package in Noble:
Fix Committed
Status in linux source package in Plucky:
Won't Fix
Status in linux source package in Questing:
Fix Committed
Status in linux source package in Resolute:
New

Bug description:
SRU Justification:

[Impact]

rarely gre_gso.sh fails with socat getting killed by signal 15. Note
that in the log below two "exiting on signal 15" are ok. The first one
should not be there.

1002773 01:08:59 DEBUG| Running 'make run_tests -C net TEST_PROGS=gre_gso.sh TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
1002774 01:08:59 DEBUG| [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kselftests_net/src/linux/tools/testing/selftests/net'
1002775 01:08:59 DEBUG| [stdout] TAP version 13
1002776 01:08:59 DEBUG| [stdout] 1..1
1002777 01:08:59 DEBUG| [stdout] # timeout set to 0
1002778 01:08:59 DEBUG| [stdout] # selftests: net: gre_gso.sh
1002779 01:09:02 DEBUG| [stdout] # 2025/11/28 01:09:02 socat[689576] W exiting on signal 15
1002780 01:09:02 DEBUG| [stdout] # TEST: GREv6/v4 - copy file w/ TSO [FAIL]
1002781 01:09:02 DEBUG| [stdout] # TEST: GREv6/v4 - copy file w/ GSO [ OK ]
1002782 01:09:02 DEBUG| [stdout] # 2025/11/28 01:09:02 socat[689568] W exiting on signal 15
1002783 01:09:03 DEBUG| [stdout] # TEST: GREv6/v6 - copy file w/ TSO [ OK ]
1002784 01:09:03 DEBUG| [stdout] # TEST: GREv6/v6 - copy file w/ GSO [ OK ]
1002785 01:09:03 DEBUG| [stdout] # 2025/11/28 01:09:03 socat[689583] W exiting on signal 15
1002786 01:09:03 DEBUG| [stdout] #
1002787 01:09:03 DEBUG| [stdout] # Tests passed: 3
1002788 01:09:03 DEBUG| [stdout] # Tests failed: 1
1002789 01:09:03 DEBUG| [stdout] not ok 1 selftests: net: gre_gso.sh # exit=1

This is most likely timing issue.

[Fix]

This can be mitigated by increasing timeout for socat from 1 to 3
seconds.

[Test Plan]

Run the test in a loop many times

[What could go wrong]

This is not a change to the kernel code but tests. The timeout does
not increase test duration when everything is fine.

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