[Bug 247647] if_vmx(4): Page fault when opening netmap port (IFLIB/DMA)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247647

--- Comment #16 from Murat <murat at balaban.io> ---
We tested this patch against 12/STABLE (677f5a8efda).

I can also confirm that patch fixes the kernel crash. PINGs are also ok.

However, if you try to do secure copy, you start getting DUP packets; and
connection stalls.

Please see attached PCAP file and the pic.

Environment:

root at OPNsense:~ # uname -a
FreeBSD OPNsense.localdomain 12.1-STABLE FreeBSD 12.1-STABLE #2
677f5a8efda(stable/12)-dirty: Tue Aug  4 14:55:58 PDT 2020    
root at client_bsd12:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

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