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net: handle more interface types without a hardware address on Plan 9

We were handling loopback devices when attempting to read hardware
address, but packet interfaces were not being handled. As a general fix,
don't attempt to read hardware address of any device that's not inside
/net.

Fixes #39908

Change-Id: Ifa05e270357e111c60906110db2cc23dc7c1c49c
Reviewed-on: https://go-review.googlesource.com/c/go/+/240259
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David du Colombier <0intro@gmail.com>
This commit is contained in:
Fazlul Shahriar 2020-06-29 01:50:50 -04:00 committed by David du Colombier
parent c875503cf7
commit a980e8a690

View File

@ -68,8 +68,8 @@ func readInterface(i int) (*Interface, error) {
}
ifc.MTU = mtu
// Not a loopback device
if device != "/dev/null" {
// Not a loopback device ("/dev/null") or packet interface (e.g. "pkt2")
if stringsHasPrefix(device, netdir+"/") {
deviceaddrf, err := open(device + "/addr")
if err != nil {
return nil, err