Bug 2216184

Summary:	tcpslice: problems finding end packet of file <filename>
Product:	Red Hat Enterprise Linux 9	Reporter:	Eduardo Olivares <eolivare>
Component:	tcpdump	Assignee:	Michal Ruprich <mruprich>
Status:	CLOSED MIGRATED	QA Contact:	rhel-cs-infra-services-qe <rhel-cs-infra-services-qe>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	9.2	CC:	msekleta
Target Milestone:	rc	Keywords:	MigratedToJIRA, Reproducer, Triaged
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2023-09-21 22:39:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Eduardo Olivares 2023-06-20 11:36:51 UTC

Description of problem:
My tests capture traffic on two different interfaces from a VM and then merge the resulting captures with tcpslice when they are not empty.
Sometimes, the tcpslice command fails like this:
[root@cmp-3-0 ~]# tcpslice -v -w /tmp/kk /tmp/tmp.tozOLM0ErS /tmp/tmp.k62LTkDd4k
tcpslice: problems finding end packet of file /tmp/tmp.k62LTkDd4k


This is how this capture files were obtained:
$ tcpdump -s0 -Uni enp2s0 src host 2001:db8::f816:3eff:fe6a:1fe6 and dst host f00d:f00d:f00d:4::1 and tcp src port 22 -w /tmp/tmp.tozOLM0ErS &
$ tcpdump -s0 -Uni enp3s0 src host 2001:db8::f816:3eff:fe6a:1fe6 and dst host f00d:f00d:f00d:4::1 and tcp src port 22 -w /tmp/tmp.k62LTkDd4k &

I can open both files with "tcpdump -r" on the RHEL9.2 VM where they were obtained, so I don't know what is the problem with tmp.k62LTkDd4k .

I have tried in my laptop (Fedora 37 - tcpdump-4.99.4-2.fc37.x86_64) and I got the same tcpslice failure. However, mergecap worked well:
$ mergecap -w merged tmp.k62LTkDd4k tmp.tozOLM0ErS


I will attach the previous files to this BZ.




Version-Release number of selected component (if applicable):
RHEL 9.2 - tcpdump-4.99.0-6.el9.x86_64

How reproducible:
This tests are re-executed often by our jobs and they fail due to this issue sometimes... I'd say 5% times (rough estimation)

Steps to Reproduce:
See previous description

Actual results:
tcpsile fails

Expected results:
tcpsile should not fail

Comment 4 RHEL Program Management 2023-09-21 22:36:49 UTC

Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 5 RHEL Program Management 2023-09-21 22:39:33 UTC

This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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