Kernel panics in 20.7 after enabling MDNS reflector, IGMP Proxy, or UDP Broadcast Relay

[Madj42]

After upgrading from 20.1 to 20.7, I'm experiencing kernel panics and reboots if I enable the IGMP Proxy, MDNS Reflector, or UDP Broadcast Relay plugins. While the bug report I'm attaching is related to the test kernel from the forums, I receive the same exact messages from the stock kernels in 20.7 and 20.7.1. I have submitted a bunch of bug reports already on this from the console.

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[Madj42]

Any chance I would be able to get someone to look at these panics or help point me in the right direction to figure out a fix? All I am doing is enabling these plugins and they cause the panic.

[fichtner]

The crashes inside swi_net() are very suspicious in the sense that they reveal nothing about a particular networking bug. Everything seems to involve multicast somehow, but since the latest multicast patches didn't help this might be something broader. I'm unsure how to proceed other than scanning for swi_net() artefacts in FreeBSD stable/12.

Cheers,
Franco

[fichtner]

Lucky guess freebsd/freebsd-src@6aa64803703ab ?

[fichtner]

I don't really understand the errata policy of FreeBSD ignoring these kind of issues in active releases... the issue was assigned to release 12 in February and would clearly apply for 12.1 fixing ever since then ;)

# opnsense-update -kr 20.7.2-igmp

Please test and let me know. Thanks for the report!

[Madj42]

Thank you! This has fixed the kernel panic. I will know later if the functionality is there. Hoping this could get rolled into the netmap kernel as well so I can use both.

[Madj42]

Functionality works as well. Thank you!

[fichtner]

Ok, great. Will add this to 20.7.3 and 20.7.3-netmap variants when the release is ready next week.