Brad Fitzpatrick 41a756c1fe net/dnsfallback: don't panic on nil netmon.Monitor in bootstrap DNS path ...

MakeLookupFunc documents its netMon parameter as optional, but
bootstrapDNSMap passed it straight to netns.NewDialer, which has panicked
on nil since 3672f29a4. Any caller that omitted the monitor and then had a
first dial fail (which is when dnscache consults LookupIPFallback) crashed
with "netns.NewDialer called with nil netMon". control/tsp clients hit this
under Antithesis fault injection.

Use a plain net.Dialer when no monitor is provided and add a regression
test.

Updates tailscale/corp#47865

Change-Id: Ie8255033602dd1f8243c1ced8f453fb7ab9be74d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

2026-09-16 07:29:31 -07:00

..

dns-fallback-servers.json

net/dnsfallback: set CanPort80 in static DERPMap (#12929)

2024-07-26 13:04:12 -07:00

dnsfallback_test.go

net/dnsfallback: don't panic on nil netmon.Monitor in bootstrap DNS path

2026-09-16 07:29:31 -07:00

dnsfallback.go

net/dnsfallback: don't panic on nil netmon.Monitor in bootstrap DNS path

2026-09-16 07:29:31 -07:00

update-dns-fallbacks.go

all: remove AUTHORS file and references to it

2026-01-23 15:49:45 -08:00