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[Jacob Martin <2113755@xxxxxxxxxxxxxxxxxx>]

In 6.14, the value of the netlink attribute id for IFLA_VXLAN_FAN_MAP
changed (from 33 to 34). iproute2 was updated in Plucky to accommodate
this, but the iproute2 in Noble still expects and uses the old value.

I suspect this is causing the call to create and configure the vxlan fan
interface to fail on 6.14 HWE kernels in Noble.

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https://bugs.launchpad.net/bugs/2113755

Title:
  ubuntu_fan_smoke_test: fan-smoke-test: Error: binary attribute size
  out of range.

Status in ubuntu-kernel-tests:
  New

Bug description:
  The following issue has been found in ubuntu_fan_smoke_test in
  ubuntu_fan_smoke_test on multiple noble 6.14 kernels (including
  hwe-6.14, oem-6.14):

  265 	  	Testing Fan Networking (pre-0.13.0 API)
  266 	  	docker pull --platform linux/amd64 ubuntu: PASSED
  267 	  	enable disable fan test: FAILED (fanatic enable-fan returned 1)
  268 	  	stderr:
  269 	  	Error: binary attribute size out of range.
  270 	  	/usr/sbin/fanctl: ip link add ftun0 type vxlan id 16384000 dev docker0 dstport 0 local 172.17.0.1 fan-map 250.0.0.0/8:172.17.0.0/16
  271 	  	/usr/sbin/fanctl: WARNING: ftun0: failed to configure address translation
  272 	  	Error: ipv4: Address not found.
  273 	  	iptables v1.8.10 (nf_tables): Chain 'fan-egress' does not exist
  274 	  	Try `iptables -h' or 'iptables --help' for more information.
  275 	  	iptables: Bad rule (does a matching rule exist in that chain?).
  276 	  	iptables: Bad rule (does a matching rule exist in that chain?).
  277 	  	iptables: No chain/target/match by that name.
  278 	  	rm: cannot remove '/run/ubuntu-fan/nat-core': No such file or directory
  279 	  	/usr/sbin/fanatic: unable to bring fan up, unable to configure

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