Found on jammy:linux-gcp-fips during 2024.04.14
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https://bugs.launchpad.net/bugs/2055473
Title:
pmtu.sh net selftest fail with PMTU exception wasn't created after
exceeding MTU
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
New
Status in linux source package in Mantic:
Won't Fix
Status in linux source package in Noble:
New
Bug description:
Issue found on J-gcp-6.5.0-1015.15~22.04.1 and M-gcp-6.5.0-1015.15 in
cycle sru-20240205
And can be reproduced with generic kernel on GCP cloud.
This is not a regression but something emerges after the pmtu.sh
result parsing logic update, which landed via stable update in
sru-20240205 cycle (bug 2043198)
Dive into test history, we can see this failure all the way back to
sru-20231030 with M-6.5.0-1010.10 on GCP cloud.
19:48:21 DEBUG| [stdout] # selftests: net: pmtu.sh
19:48:21 DEBUG| [stdout] # TEST: ipv4: PMTU exceptions
[ OK ]
19:48:21 DEBUG| [stdout] # TEST: ipv4: PMTU exceptions - nexthop objects
[ OK ]
19:48:22 DEBUG| [stdout] # TEST: ipv6: PMTU exceptions
[ OK ]
19:48:22 DEBUG| [stdout] # TEST: ipv6: PMTU exceptions - nexthop objects
[ OK ]
19:48:23 DEBUG| [stdout] # TEST: ICMPv4 with DSCP and ECN: PMTU exceptions
[FAIL]
19:48:23 DEBUG| [stdout] # PMTU exception wasn't created after exceeding MTU
19:48:24 DEBUG| [stdout] # TEST: ICMPv4 with DSCP and ECN: PMTU exceptions -
nexthop objects [FAIL]
19:48:24 DEBUG| [stdout] # PMTU exception wasn't created after exceeding MTU
19:48:25 DEBUG| [stdout] # TEST: UDPv4 with DSCP and ECN: PMTU exceptions
[FAIL]
19:48:25 DEBUG| [stdout] # PMTU exception wasn't created after exceeding MTU
19:48:25 DEBUG| [stdout] # TEST: UDPv4 with DSCP and ECN: PMTU exceptions -
nexthop objects [FAIL]
19:48:25 DEBUG| [stdout] # PMTU exception wasn't created after exceeding MTU
....
Logfile also attached (rt.log)
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