[U-Boot] [PATCH 1/1] efi_loader: CloseProtocol() requires valid agent handle

[Heinrich Schuchardt]

Return EFI_INVALID_PARAMETER from CloseProtcol() if the agent handle is not
valid.

Return EFI_INVALID_PARAMETER if the optional controller handle is not
valid.

Return immediately from efi_search_obj if the handle is NULL.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 lib/efi_loader/efi_boottime.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 9a6e1947a6..af9b2f4df3 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -971,11 +971,13 @@ struct efi_object *efi_search_obj(const efi_handle_t 
handle)
 {
        struct efi_object *efiobj;

+       if (!handle)
+               return NULL;
+
        list_for_each_entry(efiobj, &efi_obj_list, link) {
                if (efiobj == handle)
                        return efiobj;
        }
-
        return NULL;
 }

@@ -1982,7 +1984,8 @@ static efi_status_t EFIAPI 
efi_close_protocol(efi_handle_t handle,
        EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle,
                  controller_handle);

-       if (!agent_handle) {
+       if (!efi_search_obj(agent_handle) ||
+           (controller_handle && !efi_search_obj(controller_handle))) {
                r = EFI_INVALID_PARAMETER;
                goto out;
        }
--
2.20.1

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