** Description changed:
- Test failed becuase:
-./ip_defrag: sendto overlap: 1400: Operation not permitted
+ [Impact]
+ Failure to run ip_defrag deterministically.
+
+ [Fix]
+ Use smaller packets and ignore EPERM.
+
+ [Test case]
+ Run the test multiple times without observing failures.
+
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
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** Tags added: sru-20200427
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https://bugs.launchpad.net/bugs/1826848
Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed with 5.0 / 5.3
kernel
Status in
** Tags added: 5.4 focal
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Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed with 5.0 / 5.3
kernel
Status in
Found this with 5.3 Eoan on node rizzo
** Tags added: sru-20200406
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Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed
** Tags added: sru-20200316
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Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed with 5.0 / 5.3
kernel
Status in
To give more information on this issue:
ip_defrag will send a randomly-sized packet, and the result depends on
that size, so we will see intermittent failures because of this reason.
But not this reason alone. The test that fails require a conntrack rule
that will cause all fragments to be
Found this with GCP 5.3.0-1014.15
# selftests: net: ip_defrag.sh
# ipv4 defrag
# PASS
# seed = 1583552965
# ipv4 defrag with overlaps
# PASS
# seed = 1583552965
# ipv6 defrag
# PASS
# seed = 1583552971
# ipv6 defrag with overlaps
# PASS
# seed = 1583552971
# ipv6 nf_conntrack defrag
Didn't see this issue with Eoan 5.3 on node rizzo
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Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed with 5.0 / 5.3
Didn't see this issue with AWS-B-5.0 (5.0.0-1026.29-aws)
and 5.3.0-41.33-generic on node rizzo.
Found this failing with 5.3.0-1012.13~18.04.1-aws
test failed with:
# selftests: net: ip_defrag.sh
not ok 18 selftests: net: ip_defrag.sh # exit=255
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Didn't see this issue with B-5.3 (5.3.0-41.33~18.04.1), node rizzo
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https://bugs.launchpad.net/bugs/1826848
Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed
** Tags added: sru-20200106
** Tags added: gke
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Title:
ip_defrag.sh in net from ubuntu_kernel_selftests failed with 5.0 / 5.3
I am working on this test case. ip_defrag.sh fails with non-overlapping
as well, but only sometimes. I managed to find out the cause, and sent a
fix upstream, but this is under discussion now on how to fix it.
The EPERM failure with overlap happens more often, you just need to run
the test
Spotted on AWS 5.3 ARM64 (5.3.0-1009.10) with instance a1.large:
# selftests: net: ip_defrag.sh
not ok 18 selftests: net: ip_defrag.sh # exit=255
** Tags added: aws
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** Changed in: linux (Ubuntu Disco)
Status: In Progress => Confirmed
** Changed in: linux (Ubuntu Disco)
Assignee: Connor Kuehl (connork) => (unassigned)
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