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https://git.proxmox.com/git/fwupd
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d5bf8e45f2
This reverts commit 44f55e2ee6.
This behavior caused fwupdx64.efi to loop for a very long time until
either aborting, running out of memory or some other problems.
Fixes: #1756
Fixes: #1751
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* Copyright (C) 2019 Richard Hughes <richard@hughsie.com>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "fwup-cleanups.h"
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#include "fwup-common.h"
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#include "fwup-debug.h"
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#include "fwup-efi.h"
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EFI_STATUS
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fwup_delete_variable(CHAR16 *name, EFI_GUID *guid)
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{
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EFI_STATUS rc;
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UINT32 attrs = 0;
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/* get the attrs so we can delete it */
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rc = uefi_call_wrapper(RT->GetVariable, 5, name, guid, &attrs, NULL, NULL);
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if (EFI_ERROR(rc)) {
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if (rc == EFI_NOT_FOUND) {
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fwup_debug(L"Not deleting variable '%s' as not found", name);
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return EFI_SUCCESS;
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}
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fwup_debug(L"Could not get variable '%s' for delete: %r", name, rc);
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return rc;
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}
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return uefi_call_wrapper(RT->SetVariable, 5, name, guid, attrs, 0, NULL);
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}
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EFI_STATUS
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fwup_set_variable(CHAR16 *name, EFI_GUID *guid, VOID *data, UINTN size, UINT32 attrs)
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{
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return uefi_call_wrapper(RT->SetVariable, 5, name, guid, attrs, size, data);
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}
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EFI_STATUS
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fwup_get_variable(CHAR16 *name, EFI_GUID *guid, VOID **buf_out, UINTN *buf_size_out, UINT32 *attrs_out)
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{
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EFI_STATUS rc;
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UINTN size = 0;
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UINT32 attrs;
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_cleanup_free VOID *buf = NULL;
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rc = uefi_call_wrapper(RT->GetVariable, 5, name, guid, &attrs, &size, NULL);
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if (EFI_ERROR(rc)) {
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if (rc == EFI_BUFFER_TOO_SMALL) {
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buf = fwup_malloc(size);
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if (buf == NULL)
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return EFI_OUT_OF_RESOURCES;
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} else if (rc != EFI_NOT_FOUND) {
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fwup_debug(L"Could not get variable '%s': %r", name, rc);
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return rc;
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}
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} else {
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fwup_debug(L"GetVariable(%s) succeeded with size=0", name);
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return EFI_INVALID_PARAMETER;
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}
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rc = uefi_call_wrapper(RT->GetVariable, 5, name, guid, &attrs, &size, buf);
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if (EFI_ERROR(rc)) {
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fwup_warning(L"Could not get variable '%s': %r", name, rc);
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return rc;
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}
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*buf_out = _steal_pointer(&buf);
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*buf_size_out = size;
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*attrs_out = attrs;
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return EFI_SUCCESS;
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}
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