route: work around macOS kernel bug
The macOS kernel reliably crashes in a repeated TestRouteMessage.
Putting some extra padding into the request buffer avoids the crash.
This will do as workaround; the kernel bug will be reported to Apple separately.
Fixes golang/go#22456.
Change-Id: I789d3d57fbc511016d9f4a3fa7662d6c7642f137
Reviewed-on: https://go-review.googlesource.com/73690
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/route/route_classic.go b/route/route_classic.go
index 61b2bb4..02fa688 100644
--- a/route/route_classic.go
+++ b/route/route_classic.go
@@ -6,7 +6,10 @@
package route
-import "syscall"
+import (
+ "runtime"
+ "syscall"
+)
func (m *RouteMessage) marshal() ([]byte, error) {
w, ok := wireFormats[m.Type]
@@ -14,6 +17,11 @@
return nil, errUnsupportedMessage
}
l := w.bodyOff + addrsSpace(m.Addrs)
+ if runtime.GOOS == "darwin" {
+ // Fix stray pointer writes on macOS.
+ // See golang.org/issue/22456.
+ l += 1024
+ }
b := make([]byte, l)
nativeEndian.PutUint16(b[:2], uint16(l))
if m.Version == 0 {
