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net/dns, cmd/tailscaled: plumb system health tracker into dns cleanup (#12969)

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fixes tailscale#12968

The dns manager cleanup func was getting passed a nil
health tracker, which will panic.  Fixed to pass it
the system health tracker.

Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
This commit is contained in:
Jonathan Nobels 2024-07-30 12:54:03 -04:00 committed by GitHub
parent eead25560f
commit 8a8ecac6a7
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GPG Key ID: B5690EEEBB952194
2 changed files with 5 additions and 3 deletions
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2
cmd/tailscaled/tailscaled.go
View File

@ -394,7 +394,7 @@ func run() (err error) {
// Always clean up, even if we're going to run the server. This covers cases
// such as when a system was rebooted without shutting down, or tailscaled
// crashed, and would for example restore system DNS configuration.
dns.CleanUp(logf, netMon, args.tunname)
dns.CleanUp(logf, netMon, sys.HealthTracker(), args.tunname)
router.CleanUp(logf, netMon, args.tunname)
// If the cleanUp flag was passed, then exit.
if args.cleanUp {

6
net/dns/manager.go
View File

@ -538,7 +538,9 @@ func (m *Manager) FlushCaches() error {
// CleanUp restores the system DNS configuration to its original state
// in case the Tailscale daemon terminated without closing the router.
// No other state needs to be instantiated before this runs.
func CleanUp(logf logger.Logf, netMon *netmon.Monitor, interfaceName string) {
//
// health must not be nil
func CleanUp(logf logger.Logf, netMon *netmon.Monitor, health *health.Tracker, interfaceName string) {
oscfg, err := NewOSConfigurator(logf, nil, nil, interfaceName)
if err != nil {
logf("creating dns cleanup: %v", err)
@ -546,7 +548,7 @@ func CleanUp(logf logger.Logf, netMon *netmon.Monitor, interfaceName string) {
}
d := &tsdial.Dialer{Logf: logf}
d.SetNetMon(netMon)
dns := NewManager(logf, oscfg, nil, d, nil, nil, runtime.GOOS)
dns := NewManager(logf, oscfg, health, d, nil, nil, runtime.GOOS)
if err := dns.Down(); err != nil {
logf("dns down: %v", err)
}