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efi_loader: CloseProtocol() requires valid agent handle

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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.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-05-05 10:37:51 +02:00
parent 24f6be7ada
commit ec163faa1b
1 changed files with 5 additions and 2 deletions
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7
lib/efi_loader/efi_boottime.c
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@ -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;
}