gvisor: socket() returns EPROTONOSUPPORT if protocol is not supported

PiperOrigin-RevId: 250426407

1 files changed, 4 insertions, 4 deletions

diff --git a/pkg/sentry/socket/unix/unix.go b/pkg/sentry/socket/unix/unix.go
index 931056d51..1414be0c6 100644
--- a/pkg/sentry/socket/unix/unix.go
+++ b/pkg/sentry/socket/unix/unix.go
@@ -598,8 +598,8 @@ type provider struct{}
 // Socket returns a new unix domain socket.
 func (*provider) Socket(t *kernel.Task, stype transport.SockType, protocol int) (*fs.File, *syserr.Error) {
 	// Check arguments.
-	if protocol != 0 {
-		return nil, syserr.ErrInvalidArgument
+	if protocol != 0 && protocol != linux.AF_UNIX /* PF_UNIX */ {
+		return nil, syserr.ErrProtocolNotSupported
 	}
 
 	// Create the endpoint and socket.
@@ -624,8 +624,8 @@ func (*provider) Socket(t *kernel.Task, stype transport.SockType, protocol int)
 // Pair creates a new pair of AF_UNIX connected sockets.
 func (*provider) Pair(t *kernel.Task, stype transport.SockType, protocol int) (*fs.File, *fs.File, *syserr.Error) {
 	// Check arguments.
-	if protocol != 0 {
-		return nil, nil, syserr.ErrInvalidArgument
+	if protocol != 0 && protocol != linux.AF_UNIX /* PF_UNIX */ {
+		return nil, nil, syserr.ErrProtocolNotSupported
 	}
 
 	var isPacket bool