[U-Boot] [PATCH 1/1] efi_loader: allowable event types in CreateEventEx()

[Heinrich Schuchardt]

CreateEventEx() does allow the following event types:

* EVT_SIGNAL_EXIT_BOOT_SERVICES
* EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_boottime.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 602b0da9f0..8965dabb2b 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -665,10 +665,26 @@ efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl,
 					efi_guid_t *event_group,
 					struct efi_event **event)
 {
+	efi_status_t ret;
+
 	EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function,
 		  notify_context, event_group);
-	return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
-					 notify_context, event_group, event));
+
+	/*
+	 * The allowable input parameters are the same as in CreateEvent()
+	 * except for the following two disallowed event types.
+	 */
+	switch (type) {
+	case EVT_SIGNAL_EXIT_BOOT_SERVICES:
+	case EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE:
+		ret = EFI_INVALID_PARAMETER;
+		goto out;
+	}
+
+	ret = efi_create_event(type, notify_tpl, notify_function,
+			       notify_context, event_group, event);
+out:
+	return EFI_EXIT(ret);
 }

 /**
--
2.20.1