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netlink: ignore route updates with no destination

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Currently we assume each route update must have a destination, but we
should check that it is set before we try to use it.

See: #1436
This commit is contained in:
Wade Simmons 2025-07-24 16:23:36 -04:00
parent 91eff03418
commit cc2722424e
1 changed files with 5 additions and 0 deletions
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5
overlay/tun_linux.go
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@ -638,6 +638,11 @@ func (t *tun) updateRoutes(r netlink.RouteUpdate) {
return
}
if r.Dst == nil {
t.l.WithField("route", r).Debug("Ignoring route update, no destination address")
return
}
dstAddr, ok := netip.AddrFromSlice(r.Dst.IP)
if !ok {
t.l.WithField("route", r).Debug("Ignoring route update, invalid destination address")