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[GH-ISSUE #71] olm SIGSEGV #600
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Reference: github-starred/olm#600
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Originally created by @outbackdingo on GitHub (Dec 29, 2025).
Original GitHub issue: https://github.com/fosrl/olm/issues/71
Describe the Bug
olm
INFO: 2025/12/29 08:54:00 Olm version 1.3.0
DEBUG: 2025/12/29 08:54:00 Saved full olm config with all options
INFO: 2025/12/29 08:54:00 Starting HTTP server on socket /var/run/olm.sock
INFO: 2025/12/29 08:54:00 Created shared UDP socket on port 64615 (refcount: 2)
INFO: 2025/12/29 08:54:01 Starting hole punch for 0 exit nodes
INFO: 2025/12/29 08:54:01 No exit nodes available yet, waiting for nodes to be added
INFO: 2025/12/29 08:54:01 Websocket Connected
INFO: 2025/12/29 08:54:02 Sent initial ping message
INFO: 2025/12/29 08:54:02 UAPI listener started
ERROR: 2025/12/29 08:54:02 Failed to create DNS proxy: failed to pick DNS proxy IP from subnet: invalid subnet: netip.ParsePrefix(""): no '/'
INFO: 2025/12/29 08:54:02 The tunnel IP is: 100.90.128.3/24
INFO: 2025/12/29 08:54:02 Set IPv4 addresses: [100.90.128.3], subnet masks: [255.255.255.0]
INFO: 2025/12/29 08:54:02 Set MTU: 1280
INFO: 2025/12/29 08:54:02 Started holepunch connection monitor
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x60 pc=0x83e791]
goroutine 46 [running]:
github.com/fosrl/olm/dns.(*DNSProxy).Start(0x0)
github.com/fosrl/olm/dns/dns_proxy.go:224 +0x51
github.com/fosrl/olm/olm.StartTunnel.func2({{0xc00014ec20?, 0xc000366480?}, {0x9843a0?, 0xc000319290?}})
github.com/fosrl/olm/olm/olm.go:432 +0xd16
github.com/fosrl/olm/websocket.(*Client).readPumpWithDisconnectDetection(0xc000456200)
github.com/fosrl/olm/websocket/client.go:655 +0x115
created by github.com/fosrl/olm/websocket.(*Client).establishConnection in goroutine 11
github.com/fosrl/olm/websocket/client.go:506 +0x70f
Environment
To Reproduce
run olm
Expected Behavior
finialize tunnel
@oschwartz10612 commented on GitHub (Dec 29, 2025):
I think this is because you do not have a "utility subnet" defined in
your org.
Are you on the latest version of Pangolin? This could occur if you are
on a version less than 1.13.0. If so, could you turn on debug for olm
with --log-level debug and let me know the output?
@outbackdingo commented on GitHub (Dec 29, 2025):
im running Community Edition https://github.com/fosrl/pangolin
v1.11.1 https://github.com/fosrl/pangolin/releases/tag/1.11.1
ive upgraded everything and recreated the machine resources and tunnels
come up now
however no machine can ping the other ? and i cannot seem to connect via ssh
to another machine
On Mon, Dec 29, 2025 at 10:16 PM Owen Schwartz @.***>
wrote:
@oschwartz10612 commented on GitHub (Dec 30, 2025):
Make sure you have the latest newt installed and the latest Pangolin. Ping support were added in these versions! :}