[PATCH 1/2] KVM: selftests: Free the VM when the SEV smoke test's guest completes

[Gokul K <gokul02k@gmail.com>]

test_sev() returns directly out of the UCALL_DONE case rather than
leaving the loop, so the plain-SEV path skips the kvm_vm_free() at the
end of the function.  The SEV-ES path is unaffected; it breaks out of
the loop and frees the VM correctly.

main() invokes test_sev() once per supported SEV VM type, so a full run
leaks a VM and its file descriptors.  Nothing fails today because the
process exits shortly afterwards, which is presumably why this was not
noticed, but the leak also means the plain-SEV path never exercises VM
teardown.

Use a goto so UCALL_DONE joins the existing exit path.  A plain break
would only leave the switch statement and spin the loop again.

Fixes: be250ff437fa ("KVM: selftests: Add a basic SEV smoke test")
Signed-off-by: Gokul K <gokul02k@gmail.com>
---
 tools/testing/selftests/kvm/x86/sev_smoke_test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/x86/sev_smoke_test.c b/tools/testing/selftests/kvm/x86/sev_smoke_test.c
index 6b2cbe2a90b7..646ae93e3c46 100644
--- a/tools/testing/selftests/kvm/x86/sev_smoke_test.c
+++ b/tools/testing/selftests/kvm/x86/sev_smoke_test.c
@@ -178,7 +178,7 @@ static void test_sev(void *guest_code, u32 type, u64 policy)
 		case UCALL_SYNC:
 			continue;
 		case UCALL_DONE:
-			return;
+			goto done;
 		case UCALL_ABORT:
 			REPORT_GUEST_ASSERT(uc);
 		default:
@@ -187,6 +187,7 @@ static void test_sev(void *guest_code, u32 type, u64 policy)
 		}
 	}
 
+done:
 	kvm_vm_free(vm);
 }
 
-- 
2.54.0