Package: iproute2
Version: 6.14.0-3
Severity: normal
X-Debbugs-Cc: bugs....@free.fr
Dear Maintainer,
Having iproute2 >= 6.14 while running a linux kernel < 6.14
triggers this bug (tested using
debian-13-nocloud-amd64-daily-20250520-2118.qcow2)
root@localhost:~# ip monitor
Failed to add ipv4 mcaddr group to list
More specifically this subcommand, which didn't exist in iproute2 6.13
is affected:
root@localhost:~# ip mon maddr
Failed to add ipv4 mcaddr group to list
root@localhost:~# ip -6 mon maddr
Failed to add ipv6 mcaddr group to list
causing the generic "ip monitor" command to fail.
As trixie will use a 6.12.x kernel, trixie is affected.
bookworm's iproute2/bookworm-backports is also affected since currently
bookworm's backport kernel is also 6.12.x
Workarounds:
* upgrade the kernel to experimental's (currently) 6.14.6-1~exp1
* downgrade iproute2 to 6.13.0-1 (using snapshot.d.o)
* on bookworm downgrade (using snapshot.d.o)
iproute2 backport to 6.13.0-1~bpo12+1
Details I could gather:
This appears to come from this iproute2 6.14's commit:
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?h=v6.14.0&id=7240e0e40f8332dd9f11348700c0c96b8df4ca5b
which appears to depend on new kernel 6.14 rtnetlink features as described
in Kernelnewbies ( https://kernelnewbies.org/Linux_6.14#Networking ):
Add ipv6 anycast join/leave notifications
with this (kernel 6.14) commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=33d97a07b3ae6fa713919de4e1864ca04fff8f80
I guess to fix this one could:
* backport (or have upstream backport) the kernel feature to 6.12.x,
* or supply iproute2 6.13 instead of iproute 6.14 for trixie with
some versioning trick,
* or patch iproute2 to cope with a kernel not having the API changes
Regards,
Adel Belhouane.
-- System Information:
Debian Release: 13.0
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 6.12.27-amd64 (SMP w/2 CPU threads; PREEMPT)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages iproute2 depends on:
ii debconf [debconf-2.0] 1.5.91
ii libbpf1 1:1.5.0-3
ii libc6 2.41-7
ii libcap2 1:2.75-7
ii libcap2-bin 1:2.75-7
ii libdb5.3t64 5.3.28+dfsg2-9
ii libelf1t64 0.192-4
ii libmnl0 1.0.5-3
ii libselinux1 3.8.1-1
ii libtirpc3t64 1.3.6+ds-1
ii libxtables12 1.8.11-2
iproute2 recommends no packages.
Versions of packages iproute2 suggests:
ii python3 3.13.3-1
-- debconf information excluded
