shim-unsigned-x64/SOURCES/0032-Work-around-stuff-Wadd...

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2020-07-29 17:16:37 +00:00
From 2cbf56b82a5102777b37c4f7f47c8cf058cea027 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 13 May 2019 16:34:35 -0400
Subject: [PATCH 32/62] Work around stuff -Waddress-of-packed-member finds.
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In MokManager we get a lot of these:
../src/MokManager.c:1063:19: error: taking address of packed member of struct <anonymous> may result in an unaligned pointer value [-Werror=address-of-packed-member]
1063 | if (CompareGuid(&(list[i].Type), &X509_GUID) == 0)
| ^~~~~~~~~~~~~~~
The reason for this is that gnu-efi takes EFI_GUID * as its argument
instead of VOID *, and there's nothing telling the compiler that it
doesn't have alignment constraints on the input, so the compiler wants
it to have 16-byte alignment.
Just use CompareMem() for these, as that's all CompareGuid is calling
anyway.
Signed-off-by: Peter Jones <pjones@redhat.com>
Upstream-commit-id: 08c14376b59
---
MokManager.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/MokManager.c b/MokManager.c
index df9b6fe6912..a1bd39a68e2 100644
--- a/MokManager.c
+++ b/MokManager.c
@@ -22,6 +22,8 @@
#define CERT_STRING L"Select an X509 certificate to enroll:\n\n"
#define HASH_STRING L"Select a file to trust:\n\n"
+#define CompareMemberGuid(x, y) CompareMem(x, y, sizeof(EFI_GUID))
+
typedef struct {
UINT32 MokSize;
UINT8 *Mok;
@@ -1077,7 +1079,7 @@ static EFI_STATUS write_back_mok_list(MokListNode * list, INTN key_num,
continue;
DataSize += sizeof(EFI_SIGNATURE_LIST);
- if (CompareGuid(&(list[i].Type), &X509_GUID) == 0)
+ if (CompareMemberGuid(&(list[i].Type), &X509_GUID) == 0)
DataSize += sizeof(EFI_GUID);
DataSize += list[i].MokSize;
}
@@ -1099,7 +1101,7 @@ static EFI_STATUS write_back_mok_list(MokListNode * list, INTN key_num,
CertList->SignatureType = list[i].Type;
CertList->SignatureHeaderSize = 0;
- if (CompareGuid(&(list[i].Type), &X509_GUID) == 0) {
+ if (CompareMemberGuid(&(list[i].Type), &X509_GUID) == 0) {
CertList->SignatureListSize = list[i].MokSize +
sizeof(EFI_SIGNATURE_LIST) + sizeof(EFI_GUID);
CertList->SignatureSize =
@@ -1140,7 +1142,7 @@ static void delete_cert(void *key, UINT32 key_size,
int i;
for (i = 0; i < mok_num; i++) {
- if (CompareGuid(&(mok[i].Type), &X509_GUID) != 0)
+ if (CompareMemberGuid(&(mok[i].Type), &X509_GUID) != 0)
continue;
if (mok[i].MokSize == key_size &&
@@ -1191,7 +1193,7 @@ static void delete_hash_in_list(EFI_GUID Type, UINT8 * hash, UINT32 hash_size,
sig_size = hash_size + sizeof(EFI_GUID);
for (i = 0; i < mok_num; i++) {
- if ((CompareGuid(&(mok[i].Type), &Type) != 0) ||
+ if ((CompareMemberGuid(&(mok[i].Type), &Type) != 0) ||
(mok[i].MokSize < sig_size))
continue;
@@ -1355,7 +1357,7 @@ static EFI_STATUS delete_keys(void *MokDel, UINTN MokDelSize, BOOLEAN MokX)
/* Search and destroy */
for (i = 0; i < del_num; i++) {
- if (CompareGuid(&(del_key[i].Type), &X509_GUID) == 0) {
+ if (CompareMemberGuid(&(del_key[i].Type), &X509_GUID) == 0) {
delete_cert(del_key[i].Mok, del_key[i].MokSize,
mok, mok_num);
} else if (is_sha2_hash(del_key[i].Type)) {
--
2.26.2