Hi,
I come by trying to clear out a few old bugs that might still need to be
resolved (or can be closed by now).
Even though this one seems to be forgotten by everyone so far it has
been fixed.
Bionic (affected)
root@b:~# ip addr add 1.1.1.1 label test1 dev eth0
"dev" (eth0) must match "label" (test1).
root@b:~# ip addr add 1.1.1.1 label eth0-test dev eth0
root@b:~# ip addr show dev eth0 | grep test
inet 1.1.1.1/32 scope global eth0-test
Impish (fixed)
root@i:~# ip addr add 1.1.1.1 label test1 dev eth0
"label" (test1) must match "dev" (eth0) or be prefixed by "dev" with a colon.
root@i:~# ip addr add 1.1.1.1 label eth0-test dev eth0
"label" (eth0-test) must match "dev" (eth0) or be prefixed by "dev" with a
colon.
root@i:~# ip addr show dev eth0 | grep test
This was effectively fixed by
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=cad73425d8813
Which is in since v4.18.0
That version is in >=20.04 as well as in 18.04-backports.
iproute2 | 3.12.0-2 | trusty | source, amd64,
arm64, armhf, i386, powerpc, ppc64el
iproute2 | 3.12.0-2ubuntu1.2 | trusty-updates | source, amd64,
arm64, armhf, i386, powerpc, ppc64el
iproute2 | 4.3.0-1ubuntu3 | xenial | source, amd64,
arm64, armhf, i386, powerpc, ppc64el, s390x
iproute2 | 4.3.0-1ubuntu3.16.04.5 | xenial-updates | source, amd64,
arm64, armhf, i386, powerpc, ppc64el, s390x
iproute2 | 4.15.0-2ubuntu1 | bionic | source, amd64,
arm64, armhf, i386, ppc64el, s390x
iproute2 | 4.15.0-2ubuntu1.1 | bionic-security | source, amd64,
arm64, armhf, i386, ppc64el, s390x
iproute2 | 4.15.0-2ubuntu1.3 | bionic-updates | source, amd64,
arm64, armhf, i386, ppc64el, s390x
iproute2 | 4.18.0-1ubuntu2~ubuntu18.04.1 | bionic-backports | source, amd64,
arm64, armhf, i386, ppc64el, s390x
iproute2 | 5.5.0-1ubuntu1 | focal | source, amd64,
arm64, armhf, i386, ppc64el, riscv64, s390x
iproute2 | 5.10.0-4ubuntu1 | hirsute | source, amd64,
arm64, armhf, i386, ppc64el, riscv64, s390x
iproute2 | 5.10.0-4ubuntu1 | impish | source, amd64,
arm64, armhf, i386, ppc64el, riscv64, s390x
Thereby the active release that still is affected is Bionic (unless you use
bionic-backports which already have 4.18).
I think to fix this in bionic is only prio-low since it is mostly a cosmetic.
Since it is fixed in newer releases there isn't more work to be done to drive
this to conclusion for future releases.
@Nahuel - I can only beg your pardon that this was dormant for so long
:-/
** Also affects: iproute2 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: iproute2 (Ubuntu Bionic)
Status: New => Triaged
** Changed in: iproute2 (Ubuntu Bionic)
Importance: Undecided => Low
** Changed in: iproute2 (Ubuntu)
Status: Triaged => Fix Released
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to iproute2 in Ubuntu.
https://bugs.launchpad.net/bugs/1662620
Title:
"ip addr add" permits illegal labels
Status in iproute2 package in Ubuntu:
Fix Released
Status in iproute2 source package in Bionic:
Triaged
Bug description:
ip-address(8) manpage states:
label NAME
Each address may be tagged with a label string. In order to preserve
compatibility with Linux-2.0 net aliases, this string must coincide with the
name of the device or must be prefixed with the device name followed by colon.
But you can omit the colon, "ip addr add" is ONLY checking the label
is prefixed with the device:
# ip addr add 1.1.1.1 label test1 dev eth0
"dev" (eth0) must match "label" (test1).
# ip addr add 1.1.1.2 label eth0-test2 dev eth0
# ip addr add 1.1.1.3 label eth0:test3 dev eth0
Now ifconfig becomes confused about eth0-test2:
# ifconfig eth0-test2
eth0-test2: error fetching interface information: Device not found
# ifconfig eth0:test3
eth0:test3 Link encap:Ethernet HWaddr b0:d5:cc:fe:1d:7c
inet addr:1.1.1.3 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:171
And daemons like ntpd also log errors about the interface with the
illegal label:
ntpd[7570]: eth0-test3: getting interface flags: No such device
## => many of this error per minute until:
ntpd[7570]: Too many errors. Shutting up.
So, I think ip addr show disallow adding address with illegal (as stated by
his own documentation) labels, it must also check for the colon following the
dev name.
Version: 4.3.0-1ubuntu3
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1662620/+subscriptions
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