Bug 2209701

Summary:	"ip -6 route" command cuts ip address
Product:	[Fedora] Fedora	Reporter:	lars.koeppel
Component:	iproute	Assignee:	Andrea Claudi <aclaudi>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	38	CC:	aclaudi, psutter, rvokal
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Hardware:	x86_64
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description lars.koeppel 2023-05-24 14:59:28 UTC

When using tailscale, it creats an interface with an ip address with a prefixlen of 128.

If i run "ip -6 route" it will cut the ip address after 31 characters. So the output looks like "aaaa:bbbb:cccc:dddd:eeee:ffff:g" but the output is expected to look like "aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh".

In Ubuntu and Arch the same command results in the correct output. Also the command "ip -6 addr" results in the correct output on all distros.

Reproducible: Always

Steps to Reproduce:
1. run Tailscale with ipv6
2. run command "ip -6 route"
Actual Results:  
aaaa:bbbb:cccc:dddd:eeee:ffff:g dev tailscale0 proto kernel metric 256 pref medium

Expected Results:  
aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh dev tailscale0 proto kernel metric 256 pref medium

Comment 1 lars.koeppel 2023-07-17 07:32:11 UTC

Since opening this bug report, i found from an other bug report(https://github.com/shemminger/iproute2/commit/890c599ec2e8905e7b8a433be3646d5d34901810), that the problem is connected to the glibc library.

They found a solution on how to fix this problem. Maybe you can have a look at it.