[Bug 275169] Panic: rw_rlock: wlock already held for tcpinp @ /usr/src/sys/netinet/in_pcb.c:2529

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275169

--- Comment #10 from Dani I. <i.dani@outlook.com> ---
Created attachment 246450
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=246450&action=edit
Panic caused by sysctl net.link.ether.ipfw=1

A small update:
1: We're also able to trigger a panic when setting the following sysctl:
# sysctl net.link.ether.ipfw=1
After setting the sysctl the system crashes after a few seconds. The panic
seems to be the same but the locks shown in the dump seem to be different.

2: This isn't specific to http-traffic, more to tcp-traffic in general - we can
also reproduce this with ssh for example.

3: While debugging and trying out, we tried setting "hw.ix.enable_rss" to 0 in
loader.conf (default=1), which didn't have any impact (panic still occurs).

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