https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202960
Bug ID: 202960
Summary: Kernel panic when bridging e1000 NIC with pf rules
Product: Base System
Version: 10.2-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: jeff...@endrift.com
Created attachment 160825
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=160825&action=edit
core.txt
When trying to set up a tap device for bhyve, I ran into a kernel panic with
some combination of the e1000 drivers for my Intel NIC and pf forwarding of
IPv6 packets. I was following the instructions on the bhyve page for setting up
the tap device and bridge:
https://www.freebsd.org/doc/handbook/virtualization-host-bhyve.html which
worked fine until I try to bring up the bridge, at which point it will panic
shortly after (presumably when it gets an IPv6 multicast packet).
The crash appears to be a bad interaction between the e1000 driver and
ip6_forward, where it panics when trying to log that it can't forward multicast
messages. The name of the interface in one of the mbufs is null, leading to a
fault when it tries to strlen the argument to kvprintf.
core.txt is attached.
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