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linux/drivers/firmware/efi
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Ard Biesheuvel 5ad5dcfd75 x86/efistub: Don't clear BSS twice in mixed mode 
[ Upstream commit df7ecce842 ]

Clearing BSS should only be done once, at the very beginning.
efi_pe_entry() is the entrypoint from the firmware, which may not clear
BSS and so it is done explicitly. However, efi_pe_entry() is also used
as an entrypoint by the mixed mode startup code, in which case BSS will
already have been cleared, and doing it again at this point will corrupt
global variables holding the firmware's GDT/IDT and segment selectors.

So make the memset() conditional on whether the EFI stub is running in
native mode.

Fixes: b3810c5a2c ("x86/efistub: Clear decompressor BSS in native EFI entrypoint")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-03-26 18:20:13 -04:00
..
libstub x86/efistub: Don't clear BSS twice in mixed mode 2024-03-26 18:20:13 -04:00
test efi/efi_test: read RuntimeServicesSupported 2020-12-09 08:37:27 +01:00
apple-properties.c efi: fix return value of __setup handlers 2022-03-01 09:02:21 +01:00
arm-runtime.c efi: runtime: Fix potential overflow of soft-reserved region size 2024-03-01 13:34:55 +01:00
capsule-loader.c efi/capsule-loader: fix incorrect allocation size 2024-03-06 14:48:37 +00:00
capsule.c efi: capsule: clean scatter-gather entries from the D-cache 2020-12-09 08:37:27 +01:00
cper-arm.c efi/cper: Remove unnecessary aer.h include 2023-04-07 16:42:31 -05:00
cper-x86.c x86/mce, cper: Pass x86 CPER through the MCA handling chain 2020-11-21 12:05:41 +01:00
cper.c EFI updates for v6.2: 2022-12-13 14:31:47 -08:00
cper_cxl.c efi/cper, cxl: Remove cxl_err.h 2023-02-03 23:59:58 +01:00
cper_cxl.h efi/cper, cxl: Decode CXL Protocol Error Section 2022-11-18 09:14:10 +01:00
dev-path-parser.c efi/dev-path-parser: Refactor _UID handling to use acpi_dev_uid_to_integer() 2022-09-19 18:34:42 +02:00
earlycon.c efi: earlycon: Reprobe after parsing config tables 2023-03-13 23:28:43 +01:00
efi-bgrt.c efi/bgrt: Accept BGRT tables with a version of 0 2020-02-22 23:37:37 +01:00
efi-init.c efi: Don't add memblocks for soft-reserved memory 2024-03-01 13:34:55 +01:00
efi-pstore.c EFI updates for v6.2: 2022-12-13 14:31:47 -08:00
efi.c Merge 3rd batch of EFI fixes into efi/urgent 2023-10-20 18:11:06 +02:00
efibc.c efi: efibc: Guard against allocation failure 2022-09-20 18:42:55 +02:00
embedded-firmware.c crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
esrt.c efi/esrt: Allow ESRT access without CAP_SYS_ADMIN 2023-06-06 15:33:59 +02:00
fdtparams.c efi: xen: Set EFI_PARAVIRT for Xen dom0 boot on all architectures 2022-11-18 09:14:09 +01:00
Kconfig efi/libstub: Implement support for unaccepted memory 2023-06-06 16:58:23 +02:00
Makefile efi: Add unaccepted memory support 2023-06-06 17:22:20 +02:00
memattr.c A healthy mix of EFI contributions this time: 2023-02-23 14:41:48 -08:00
memmap.c efi: xen: Set EFI_PARAVIRT for Xen dom0 boot on all architectures 2022-11-18 09:14:09 +01:00
mokvar-table.c efi/mokvar: move up init order 2022-03-08 13:55:52 +02:00
rci2-table.c efi: Don't attempt to map RCI2 config table if it doesn't exist 2019-12-10 12:13:02 +01:00
reboot.c efi: Fix efi_power_off() not being run before acpi_power_off() when necessary 2022-07-10 17:41:06 +02:00
riscv-runtime.c efi: runtime: Fix potential overflow of soft-reserved region size 2024-03-01 13:34:55 +01:00
runtime-wrappers.c efi/runtime-wrappers: Clean up white space and add __init annotation 2023-08-22 10:39:26 +02:00
sysfb_efi.c efi: sysfb_efi: Add quirk for Lenovo Yoga Book X91F/L 2023-03-18 11:44:57 +01:00
tpm.c efi/tpm: Pass correct address to memblock_reserve 2022-10-24 08:04:25 +02:00
unaccepted_memory.c efi/unaccepted: Fix off-by-one when checking for overlapping ranges 2023-12-08 08:52:23 +01:00
vars.c efivarfs: expose used and total size 2023-05-17 18:21:34 +02:00