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Date: Tue, 14 Mar 2023 13:13:49 +0300 From: Evgeniy Baskov <baskov@...ras.ru> To: Ard Biesheuvel <ardb@...nel.org> Cc: Evgeniy Baskov <baskov@...ras.ru>, Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>, Dave Hansen <dave.hansen@...ux.intel.com>, Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Alexey Khoroshilov <khoroshilov@...ras.ru>, Peter Jones <pjones@...hat.com>, Gerd Hoffmann <kraxel@...hat.com>, "Limonciello, Mario" <mario.limonciello@....com>, joeyli <jlee@...e.com>, lvc-project@...uxtesting.org, x86@...nel.org, linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org Subject: [PATCH v5 22/27] x86/build: set type_of_loader for EFISTUB After switching to the local copy of boot_params, EFISTUB stopped setting type_of_loader, using the default value of 0. Restore that behavior by assigning the right value at the build time. Signed-off-by: Evgeniy Baskov <baskov@...ras.ru> --- arch/x86/boot/tools/build.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index 476ef05f16fb..5ac4f08ed923 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -588,6 +588,8 @@ int main(int argc, char **argv) memcpy(output + setup_size + efi_boot_params + SETUP_HEADER_OFFSET, setup_header, 0x290 - SETUP_HEADER_OFFSET /* == max possible sizeof(struct setup_header) */); + /* Set type_of_loader to the one that EFISTUB uses for the local copy */ + output[setup_size + efi_boot_params + SETUP_HEADER_OFFSET + 0x1F] = 0x21; #endif /* Calculate and write kernel checksum. */ -- 2.39.2
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