[Bug 247647] panic: page fault when opening netmap port (vmxnet3)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Jun 30 19:33:32 UTC 2020


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

--- Comment #3 from Vincenzo Maffione <vmaffione at FreeBSD.org> ---
Ack.
This is also easily reproducible on stable/12, within a QEMU/KVM VM:

# ifconfig vmx0 up
# pkt-gen -i vmx0
[CRASH]

It's a bug related to the DMA code within iflib (on the receive side).
I'll try to investigate.

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