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From 2cbf56b82a5102777b37c4f7f47c8cf058cea027 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Mon, 13 May 2019 16:34:35 -0400
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Subject: [PATCH 32/62] Work around stuff -Waddress-of-packed-member finds.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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In MokManager we get a lot of these:
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../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]
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1063 | if (CompareGuid(&(list[i].Type), &X509_GUID) == 0)
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| ^~~~~~~~~~~~~~~
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The reason for this is that gnu-efi takes EFI_GUID * as its argument
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instead of VOID *, and there's nothing telling the compiler that it
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doesn't have alignment constraints on the input, so the compiler wants
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it to have 16-byte alignment.
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Just use CompareMem() for these, as that's all CompareGuid is calling
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anyway.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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Upstream-commit-id: 08c14376b59
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---
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MokManager.c | 12 +++++++-----
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1 file changed, 7 insertions(+), 5 deletions(-)
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diff --git a/MokManager.c b/MokManager.c
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index df9b6fe6912..a1bd39a68e2 100644
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--- a/MokManager.c
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+++ b/MokManager.c
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@@ -22,6 +22,8 @@
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#define CERT_STRING L"Select an X509 certificate to enroll:\n\n"
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#define HASH_STRING L"Select a file to trust:\n\n"
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+#define CompareMemberGuid(x, y) CompareMem(x, y, sizeof(EFI_GUID))
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+
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typedef struct {
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UINT32 MokSize;
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UINT8 *Mok;
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@@ -1077,7 +1079,7 @@ static EFI_STATUS write_back_mok_list(MokListNode * list, INTN key_num,
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continue;
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DataSize += sizeof(EFI_SIGNATURE_LIST);
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- if (CompareGuid(&(list[i].Type), &X509_GUID) == 0)
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+ if (CompareMemberGuid(&(list[i].Type), &X509_GUID) == 0)
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DataSize += sizeof(EFI_GUID);
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DataSize += list[i].MokSize;
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}
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@@ -1099,7 +1101,7 @@ static EFI_STATUS write_back_mok_list(MokListNode * list, INTN key_num,
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CertList->SignatureType = list[i].Type;
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CertList->SignatureHeaderSize = 0;
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- if (CompareGuid(&(list[i].Type), &X509_GUID) == 0) {
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+ if (CompareMemberGuid(&(list[i].Type), &X509_GUID) == 0) {
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CertList->SignatureListSize = list[i].MokSize +
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sizeof(EFI_SIGNATURE_LIST) + sizeof(EFI_GUID);
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CertList->SignatureSize =
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@@ -1140,7 +1142,7 @@ static void delete_cert(void *key, UINT32 key_size,
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int i;
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for (i = 0; i < mok_num; i++) {
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- if (CompareGuid(&(mok[i].Type), &X509_GUID) != 0)
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+ if (CompareMemberGuid(&(mok[i].Type), &X509_GUID) != 0)
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continue;
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if (mok[i].MokSize == key_size &&
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@@ -1191,7 +1193,7 @@ static void delete_hash_in_list(EFI_GUID Type, UINT8 * hash, UINT32 hash_size,
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sig_size = hash_size + sizeof(EFI_GUID);
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for (i = 0; i < mok_num; i++) {
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- if ((CompareGuid(&(mok[i].Type), &Type) != 0) ||
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+ if ((CompareMemberGuid(&(mok[i].Type), &Type) != 0) ||
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(mok[i].MokSize < sig_size))
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continue;
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@@ -1355,7 +1357,7 @@ static EFI_STATUS delete_keys(void *MokDel, UINTN MokDelSize, BOOLEAN MokX)
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/* Search and destroy */
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for (i = 0; i < del_num; i++) {
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- if (CompareGuid(&(del_key[i].Type), &X509_GUID) == 0) {
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+ if (CompareMemberGuid(&(del_key[i].Type), &X509_GUID) == 0) {
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delete_cert(del_key[i].Mok, del_key[i].MokSize,
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mok, mok_num);
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} else if (is_sha2_hash(del_key[i].Type)) {
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--
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2.26.2
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