diff options
| author |   Ard Biesheuvel <ardb@kernel.org> | 2020-02-01 09:32:21 +0100 |
|---|---|---|
| committer |   Mimi Zohar <zohar@linux.ibm.com> | 2020-02-11 14:42:37 -0500 |
| commit | ff5ac61ee83c13f516544d29847d28be093a40ee (patch) | |
| tree | 2c74d8c21779f5753a602cf9ffc6b39b468ff9de /arch | |
| parent | Linux 5.6-rc1 (diff) | |
| download | linux-dev-ff5ac61ee83c13f516544d29847d28be093a40ee.tar.xz linux-dev-ff5ac61ee83c13f516544d29847d28be093a40ee.zip | |
x86/ima: use correct identifier for SetupMode variable
The IMA arch code attempts to inspect the "SetupMode" EFI variable
by populating a variable called efi_SetupMode_name with the string
"SecureBoot" and passing that to the EFI GetVariable service, which
obviously does not yield the expected result.
Given that the string is only referenced a single time, let's get
rid of the intermediate variable, and pass the correct string as
an immediate argument. While at it, do the same for "SecureBoot".
Fixes: 399574c64eaf ("x86/ima: retry detecting secure boot mode")
Fixes: 980ef4d22a95 ("x86/ima: check EFI SetupMode too")
Cc: Matthew Garrett <mjg59@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: stable@vger.kernel.org # v5.3
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/ima_arch.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/x86/kernel/ima_arch.c b/arch/x86/kernel/ima_arch.c index 4d4f5d9faac3..23054909c8dd 100644 --- a/arch/x86/kernel/ima_arch.c +++ b/arch/x86/kernel/ima_arch.c @@ -10,8 +10,6 @@ extern struct boot_params boot_params; static enum efi_secureboot_mode get_sb_mode(void) { - efi_char16_t efi_SecureBoot_name[] = L"SecureBoot"; - efi_char16_t efi_SetupMode_name[] = L"SecureBoot"; efi_guid_t efi_variable_guid = EFI_GLOBAL_VARIABLE_GUID; efi_status_t status; unsigned long size; @@ -25,7 +23,7 @@ static enum efi_secureboot_mode get_sb_mode(void) } /* Get variable contents into buffer */ - status = efi.get_variable(efi_SecureBoot_name, &efi_variable_guid, + status = efi.get_variable(L"SecureBoot", &efi_variable_guid, NULL, &size, &secboot); if (status == EFI_NOT_FOUND) { pr_info("ima: secureboot mode disabled\n"); @@ -38,7 +36,7 @@ static enum efi_secureboot_mode get_sb_mode(void) } size = sizeof(setupmode); - status = efi.get_variable(efi_SetupMode_name, &efi_variable_guid, + status = efi.get_variable(L"SetupMode", &efi_variable_guid, NULL, &size, &setupmode); if (status != EFI_SUCCESS) /* ignore unknown SetupMode */ |