Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'efi-fixes-for-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fix from Ard Biesheuvel:
"This fixes an oversight on my part in the recent EFI stub rework for
x86, which is needed to get Linux/x86 distro builds signed again for
secure boot by Microsoft. For this reason, most of this work is being
backported to v6.1, which is therefore also affected by this
regression.
- Explicitly wipe BSS in the native EFI entrypoint, so that globals
shared with the legacy decompressor are zero-initialized correctly"
* tag 'efi-fixes-for-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
x86/efistub: Clear decompressor BSS in native EFI entrypoint
+4
-2
+4
-2
drivers/firmware/efi/libstub/x86-stub.c
+4
-2
drivers/firmware/efi/libstub/x86-stub.c
···
21
21
#include "efistub.h"
22
22
#include "x86-stub.h"
23
23
24
+
extern char _bss[], _ebss[];
25
+
24
26
const efi_system_table_t *efi_system_table;
25
27
const efi_dxe_services_table_t *efi_dxe_table;
26
28
static efi_loaded_image_t *image = NULL;
···
475
473
int options_size = 0;
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474
efi_status_t status;
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475
char *cmdline_ptr;
476
+
477
+
memset(_bss, 0, _ebss - _bss);
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478
479
479
efi_system_table = sys_table_arg;
480
480
···
974
970
void efi_handover_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg,
975
971
struct boot_params *boot_params)
976
972
{
977
-
extern char _bss[], _ebss[];
978
-
979
973
memset(_bss, 0, _ebss - _bss);
980
974
efi_stub_entry(handle, sys_table_arg, boot_params);
981
975
}