23.05 Wrong route subnet calculation

[StifflersMom]

Describe the bug

UCI, network:

config route
        option interface 'eth3_mgnt'
        option target '172.16.0.0/12'
        option gateway '10.20.30.41'

results to:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
172.0.0.0       10.20.30.41     255.240.0.0     UG    0      0        0 eth3

OpenWrt version

r23497-6637af95aa

OpenWrt target/subtarget

x86/64

Device

AMI Corporation Aptio CRB

Image kind

Official downloaded image

Steps to reproduce

Add a route to 172.16.0.0/12 via UCI or LUCI

Actual behaviour

actually, the result is a route to 172.0.0.0/12 instead of 172.16.0.0/12

Expected behaviour

No response

Additional info

I'm sure, this bug comes with one of the latest updates because I had already installed 23.05 with functional routing

Diffconfig

No response

Terms

• [X] I am reporting an issue for OpenWrt, not an unsupported fork.

[jow-]

Indeed, that one is on me :/