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netlink: ignore route updates with no destination (#1437)

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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
2025-08-25 14:05:35 -04:00
committed by GitHub
parent 7da79685ff
commit 5cff83b282
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")