Merge tag 'efi-2019-07-rc3-3' of git://git.denx.de/u-boot-efi

[oweals/u-boot.git] / lib / efi_loader / efi_boottime.c

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index ec6f5758ded3d7812eb47957ee142be77061affa..54fff85e64efff2e0dc49160331aa8e689b352bc 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1916,10 +1916,17 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
 {
        static uint64_t mono;
+       efi_status_t ret;
 
        EFI_ENTRY("%p", count);
+       if (!count) {
+               ret = EFI_INVALID_PARAMETER;
+               goto out;
+       }
        *count = mono++;
-       return EFI_EXIT(EFI_SUCCESS);
+       ret = EFI_SUCCESS;
+out:
+       return EFI_EXIT(ret);
 }
 
 /**
@@ -2334,6 +2341,7 @@ efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
        efi_va_list argptr;
        const efi_guid_t *protocol;
        void *protocol_interface;
+       efi_handle_t old_handle;
        efi_status_t r = EFI_SUCCESS;
        int i = 0;
 
@@ -2346,6 +2354,20 @@ efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
                if (!protocol)
                        break;
                protocol_interface = efi_va_arg(argptr, void*);
+               /* Check that a device path has not been installed before */
+               if (!guidcmp(protocol, &efi_guid_device_path)) {
+                       struct efi_device_path *dp = protocol_interface;
+
+                       r = EFI_CALL(efi_locate_device_path(protocol, &dp,
+                                                           &old_handle));
+                       if (r == EFI_SUCCESS &&
+                           dp->type == DEVICE_PATH_TYPE_END) {
+                               EFI_PRINT("Path %pD already installed\n",
+                                         protocol_interface);
+                               r = EFI_ALREADY_STARTED;
+                               break;
+                       }
+               }
                r = EFI_CALL(efi_install_protocol_interface(
                                                handle, protocol,
                                                EFI_NATIVE_INTERFACE,
@@ -2453,9 +2475,16 @@ static efi_status_t EFIAPI efi_calculate_crc32(const void *data,
                                               efi_uintn_t data_size,
                                               u32 *crc32_p)
 {
+       efi_status_t ret = EFI_SUCCESS;
+
        EFI_ENTRY("%p, %zu", data, data_size);
+       if (!data || !data_size || !crc32_p) {
+               ret = EFI_INVALID_PARAMETER;
+               goto out;
+       }
        *crc32_p = crc32(0, data, data_size);
-       return EFI_EXIT(EFI_SUCCESS);
+out:
+       return EFI_EXIT(ret);
 }
 
 /**