net: TestInterfaceArrivalAndDepartureZoneCache failures

[gopherbot]

#!watchflakes
default <- pkg == "net" && test == "TestInterfaceArrivalAndDepartureZoneCache"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestInterfaceArrivalAndDepartureZoneCache (0.00s)
    interface_unix_test.go:196: args=[ip address add fe80::1 dev gotest0] out="RTNETLINK answers: Permission denied\n" err=exit status 2

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net" && test == "TestInterfaceArrivalAndDepartureZoneCache"

2023-07-19 19:10 linux-arm64-longtest go@6211a024 net.TestInterfaceArrivalAndDepartureZoneCache (log)

--- FAIL: TestInterfaceArrivalAndDepartureZoneCache (0.00s)
    interface_unix_test.go:196: args=[ip address add fe80::1 dev gotest0] out="RTNETLINK answers: Permission denied\n" err=exit status 2

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net" && test == "TestInterfaceArrivalAndDepartureZoneCache"

2023-07-18 17:25 linux-arm64-longtest go@c2de6836 net.TestInterfaceArrivalAndDepartureZoneCache (log)

--- FAIL: TestInterfaceArrivalAndDepartureZoneCache (0.00s)
    interface_unix_test.go:196: args=[ip address add fe80::1 dev gotest0] out="RTNETLINK answers: Permission denied\n" err=exit status 2
2023/07/18 19:07:19 killing splice client after 5 second shutdown timeout

2023-07-19 21:06 linux-arm64-longtest go@03c7e96b net.TestInterfaceArrivalAndDepartureZoneCache (log)

--- FAIL: TestInterfaceArrivalAndDepartureZoneCache (0.00s)
    interface_unix_test.go:196: args=[ip address add fe80::1 dev gotest0] out="RTNETLINK answers: Permission denied\n" err=exit status 2
2023/07/19 21:23:19 killing splice client after 5 second shutdown timeout

— watchflakes