Fix ephemeral port range parity to eliminate kernel warning #13976
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- Changed c_ephemeralPortRange from (10000, 20000) to (10000, 20001) to fix parity - 10000 is even, 20001 is odd - different parity eliminates dmesg warning - Changed CONTAINER_PORT_RANGE from (20000, 65535) to (20002, 65535) - Ensures non-overlapping ranges and static_assert passes (20001 < 20002) - Reverts incorrect change from previous commit that set it to 20000 Co-authored-by: benhillis <17727402+benhillis@users.noreply.github.com>
Co-authored-by: benhillis <17727402+benhillis@users.noreply.github.com>
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[WIP] Fix default CONTAINER_PORT_RANGE to resolve dmesg warning
Fix ephemeral port range parity to eliminate kernel warning
Dec 24, 2025
benhillis
merged commit 51d9760
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user/benhill/wsla_port_range_parity
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Summary of the Pull Request
Fixes Linux kernel dmesg warning:
ip_local_port_range: prefer different parity for start/end values.The kernel generates this warning when
/proc/sys/net/ipv4/ip_local_port_rangeis set with both values having the same parity. The ephemeral range was configured as(10000, 20000)— both even.Changes:
c_ephemeralPortRange:(10000, 20000)→(10000, 20001)for different parityCONTAINER_PORT_RANGE:(20000, 65535)→(20002, 65535)to maintain non-overlapping ranges and satisfystatic_assert(c_ephemeralPortRange.second < CONTAINER_PORT_RANGE.first)PR Checklist
Detailed Description of the Pull Request / Additional comments
The ephemeral port range is written to the kernel in
WSLAInit.cpp:891-892:With
(10000, 20001), the kernel receives start=10000 (even), end=20001 (odd), eliminating the parity warning. The container port range adjustment ensures no port allocation overlap.Validation Steps Performed
20001 < 20002evaluates totrue💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.