syz-fuzzer: fix testing when shmem is not used

We get program output info only if shmem is used.
Output info over pipes is not implemented.
So don't fail when we got nothing.

1 files changed, 6 insertions, 0 deletions

diff --git a/syz-fuzzer/testing.go b/syz-fuzzer/testing.go
index 990891348..0819d4dc4 100644
--- a/syz-fuzzer/testing.go
+++ b/syz-fuzzer/testing.go
@@ -128,6 +128,7 @@ func checkSimpleProgram(args *checkArgs) error {
 	if err != nil {
 		return fmt.Errorf("failed to create ipc env: %v", err)
 	}
+	defer env.Close()
 	p := args.target.GenerateSimpleProg()
 	output, info, failed, hanged, err := env.Exec(args.ipcExecOpts, p)
 	if err != nil {
@@ -139,6 +140,11 @@ func checkSimpleProgram(args *checkArgs) error {
 	if failed {
 		return fmt.Errorf("program failed:\n%s", output)
 	}
+	if args.ipcConfig.Flags&ipc.FlagUseShmem == 0 {
+		// Output is currently only supported via shmem.
+		// So if we are using pipes, we won't get any info.
+		return nil
+	}
 	if len(info) == 0 {
 		return fmt.Errorf("no calls executed:\n%s", output)
 	}