Merge pull request #42649 from kinvolk/rata/seccomp-default-errno

seccomp: Use explicit DefaultErrnoRet

profiles/seccomp/default.json

@@ -1,5 +1,6 @@
 {
 	"defaultAction": "SCMP_ACT_ERRNO",
+	"defaultErrnoRet": 1,
 	"archMap": [
 		{
 			"architecture": "SCMP_ARCH_X86_64",

profiles/seccomp/default_linux.go

@@ -753,9 +753,11 @@ func DefaultProfile() *Seccomp {
 		},
 	}
 
+	errnoRet := uint(unix.EPERM)
 	return &Seccomp{
 		LinuxSeccomp: specs.LinuxSeccomp{
-			DefaultAction: specs.ActErrno,
+			DefaultAction:   specs.ActErrno,
+			DefaultErrnoRet: &errnoRet,
 		},
 		ArchMap:  arches(),
 		Syscalls: syscalls,

profiles/seccomp/fixtures/example.json

@@ -1,5 +1,6 @@
 {
     "defaultAction": "SCMP_ACT_ERRNO",
+    "defaultErrnoRet": 1,
     "syscalls": [
         {
             "name": "clone",

profiles/seccomp/seccomp_test.go

@@ -23,8 +23,10 @@ func TestLoadProfile(t *testing.T) {
 		t.Fatal(err)
 	}
 	var expectedErrno uint = 12345
+	var expectedDefaultErrno uint = 1
 	expected := specs.LinuxSeccomp{
-		DefaultAction: specs.ActErrno,
+		DefaultAction:   specs.ActErrno,
+		DefaultErrnoRet: &expectedDefaultErrno,
 		Syscalls: []specs.LinuxSyscall{
 			{
 				Names:  []string{"clone"},