diff mbox series

[v2,2/2] x86/boot: efistub: Assign global boot_params variable

Message ID 20231017132510.3845531-6-ardb@google.com
State New
Headers show
Series x86/boot: Fix boot_params init in EFI stub | expand

Commit Message

Ard Biesheuvel Oct. 17, 2023, 1:25 p.m. UTC 
From: Ard Biesheuvel <ardb@kernel.org>

Now that the x86 EFI stub calls into some APIs exposed by the
decompressor (e.g., kaslr_get_random_long()), it is necessary to ensure
that the global boot_params variable is set correctly before doing so.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/x86-stub.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index 3bfc59637dd1..2e374ce099ab 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -818,6 +818,8 @@  void __noreturn efi_stub_entry(efi_handle_t handle,
 	unsigned long kernel_entry;
 	efi_status_t status;
 
+	boot_params_p = boot_params;
+
 	efi_system_table = sys_table_arg;
 	/* Check if we were booted by the EFI firmware */
 	if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)