pkg/host: only try enabled syscalls when starting syz-fuzzer

When syz-fuzzer starts, it tries all syscalls to filter out any that are
not supported. This process should include only the syscalls that are
enabled using the 'enable_syscalls' and 'disable_syscalls' fields in
syz-manager's config.

This is useful for fuzzing Cuttlefish devices, for example, where the
'vhost_vsock' syscall needs to be excluded from fuzzing and from this
test.

1 files changed, 5 insertions, 1 deletions

diff --git a/pkg/runtest/run_test.go b/pkg/runtest/run_test.go
index adafedab2..bc71a9f08 100644
--- a/pkg/runtest/run_test.go
+++ b/pkg/runtest/run_test.go
@@ -58,7 +58,11 @@ func test(t *testing.T, sysTarget *targets.Target) {
 	if err != nil {
 		t.Fatalf("failed to detect host features: %v", err)
 	}
-	calls, _, err := host.DetectSupportedSyscalls(target, "none")
+	enabled := make(map[*prog.Syscall]bool)
+	for _, c := range target.Syscalls {
+		enabled[c] = true
+	}
+	calls, _, err := host.DetectSupportedSyscalls(target, "none", enabled)
 	if err != nil {
 		t.Fatalf("failed to detect supported syscalls: %v", err)
 	}