AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/acpi
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Nathan Chancellor cc0b1776fd ACPI: bgrt: Fix CFI violation 
[ Upstream commit f37ccf8fce155d08ae2a4fb3db677911ced0c21a ]

clang's Control Flow Integrity requires that every indirect call has a
valid target, which is based on the type of the function pointer. The
*_show() functions in this file are written as if they will be called
from dev_attr_show(); however, they will be called from
sysfs_kf_seq_show() because the files were created by
sysfs_create_group() and the sysfs ops are based on kobj_sysfs_ops
because of kobject_add_and_create(). Because the *_show() functions do
not match the type of the show() member in struct kobj_attribute, there
is a CFI violation.

$ cat /sys/firmware/acpi/bgrt/{status,type,version,{x,y}offset}}
1
0
1
522
307

$ dmesg | grep "CFI failure"
[  267.761825] CFI failure (target: type_show.d5e1ad21498a5fd14edbc5c320906598.cfi_jt+0x0/0x8):
[  267.762246] CFI failure (target: xoffset_show.d5e1ad21498a5fd14edbc5c320906598.cfi_jt+0x0/0x8):
[  267.762584] CFI failure (target: status_show.d5e1ad21498a5fd14edbc5c320906598.cfi_jt+0x0/0x8):
[  267.762973] CFI failure (target: yoffset_show.d5e1ad21498a5fd14edbc5c320906598.cfi_jt+0x0/0x8):
[  267.763330] CFI failure (target: version_show.d5e1ad21498a5fd14edbc5c320906598.cfi_jt+0x0/0x8):

Convert these functions to the type of the show() member in struct
kobj_attribute so that there is no more CFI violation. Because these
functions are all so similar, combine them into a macro.

Fixes: d1ff4b1cdb ("ACPI: Add support for exposing BGRT data")
Link: https://github.com/ClangBuiltLinux/linux/issues/1406
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-14 16:56:12 +02:00
..
acpica ACPICA: Fix memory leak caused by _CID repair function 2021-07-14 16:55:59 +02:00
apei ACPI: APEI: fix synchronous external aborts in user-mode 2021-07-14 16:56:12 +02:00
arm64 ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure 2021-05-11 14:47:34 +02:00
dptf ACPI: DPTF: Support Alder Lake 2020-11-10 18:52:51 +01:00
nfit ACPI: NFIT: Fix input validation of bus-family 2020-12-30 11:54:05 +01:00
numa ACPI updates for 5.10-rc1 2020-10-14 11:42:04 -07:00
pmic ACPI / PMIC: Move TPS68470 OpRegion driver to drivers/acpi/pmic/ 2020-09-15 19:40:59 +02:00
x86 ACPI: Convert to new X86 CPU match macros 2020-03-24 21:30:50 +01:00
ac.c Merge branches 'acpi-mm', 'acpi-tables', 'acpi-apei' and 'acpi-misc' 2020-08-03 13:14:42 +02:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c Merge 5.2-rc6 into char-misc-next 2019-06-23 09:23:33 +02:00
acpi_apd.c serial: 8250_dw: Add device HID for new AMD UART controller 2021-06-03 09:00:33 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Remove leftover ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_configfs.c ACPI: configfs: add missing check after configfs_register_default_group() 2021-03-04 11:38:22 +01:00
acpi_dbg.c ACPI: debug: don't allow debugging when ACPI is disabled 2020-10-16 17:58:52 +02:00
acpi_extlog.c ACPI / extlog: Check for RDMSR failure 2020-10-02 19:01:55 +02:00
acpi_ipmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c drm next for 5.10-rc1 2020-10-15 10:46:16 -07:00
acpi_memhotplug.c mm/memory_hotplug: prepare passing flags to add_memory() and friends 2020-10-16 11:11:18 -07:00
acpi_pad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
acpi_platform.c ACPI: platform: Remove ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_pnp.c ACPI: PNP: compare the string length in the matching_id() 2020-12-30 11:54:06 +01:00
acpi_processor.c ACPI: processor: remove comment regarding string _UID support 2020-10-16 18:11:27 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
acpi_video.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
acpi_watchdog.c ACPI: watchdog: Put the watchdog action table after parsing 2020-05-09 11:29:17 +02:00
battery.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
bgrt.c ACPI: bgrt: Fix CFI violation 2021-07-14 16:56:12 +02:00
blacklist.c ACPI: blacklist: fix clang warning for unused DMI table 2019-07-11 22:45:00 +02:00
bus.c ACPI: bus: Call kobject_put() in acpi_init() error path 2021-07-14 16:55:59 +02:00
button.c ACPI: button: Add DMI quirk for Medion Akoya E2228T 2020-11-09 19:29:41 +01:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: Replace cppc_attr with kobj_attribute 2021-05-14 09:50:16 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-05-11 14:47:12 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-07-14 16:56:11 +02:00
device_sysfs.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
dock.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
ec.c ACPI: EC: trust DSDT GPE for certain HP laptop 2021-07-14 16:56:01 +02:00
event.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-07-14 16:56:11 +02:00
fan.h ACPI: PM / fan: Put fan device IDs into separate header file 2021-07-14 16:56:11 +02:00
glue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
hed.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
internal.h ACPI: scan: Use unique number for instance_no 2021-03-30 14:32:06 +02:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 11:01:13 -07:00
Kconfig ACPI / PMIC: Move TPS68470 OpRegion driver to drivers/acpi/pmic/ 2020-09-15 19:40:59 +02:00
Makefile ACPI: tables: Add custom DSDT file as makefile prerequisite 2021-07-14 16:56:01 +02:00
nvs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c ACPI: OSL: Make ACPICA use logical addresses of GPE blocks 2020-09-11 16:45:00 +02:00
pci_irq.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_link.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_mcfg.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_root.c Merge branches 'acpi-extlog', 'acpi-memhotplug', 'acpi-button', 'acpi-tools' and 'acpi-pci' 2020-10-13 14:45:36 +02:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
power.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-07-14 16:56:12 +02:00
pptt.c ACPI: PPTT: Consistently use unsigned int as parameter type 2020-01-07 11:46:36 +01:00
proc.c ACPI: proc: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_core.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_driver.c cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
processor_idle.c ACPI: processor idle: Fix up C-state latency if not ordered 2021-07-14 16:55:57 +02:00
processor_pdc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor_perflib.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
processor_thermal.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_throttling.c x86: ACPI: fix CPU hotplug deadlock 2020-04-04 16:28:24 +02:00
property.c ACPI: property: Fix fwnode string properties matching 2021-03-04 11:38:22 +01:00
reboot.c ACPI: reboot: Avoid racing after writing to ACPI RESET_REG 2020-10-16 18:04:52 +02:00
resource.c ACPI: resources: Add checks for ACPI IRQ override 2021-07-14 16:55:59 +02:00
sbs.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: scan: Fix a memory leak in an error handling path 2021-05-19 10:13:13 +02:00
sleep.c Revert "ACPI: sleep: Put the FACS table after using it" 2021-06-16 12:01:39 +02:00
sleep.h ACPI: PM: Add acpi_[un]register_wakeup_handler() 2020-04-04 19:45:18 +02:00
spcr.c ACPI: Use fallthrough pseudo-keyword 2020-07-09 14:09:28 +02:00
sysfs.c Merge back sysfs-related ACPI material for v5.9. 2020-06-29 13:49:49 +02:00
tables.c ACPI: tables: x86: Reserve memory occupied by ACPI tables 2021-04-07 15:00:08 +02:00
thermal.c ACPI: thermal: Do not call acpi_thermal_check() directly 2021-02-03 23:28:37 +01:00
tiny-power-button.c ACPI: tiny-power-button: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
utils.c ACPI: utils: remove unreachable breaks 2020-10-22 18:58:26 +02:00
video_detect.c ACPI: video: use native backlight for GA401/GA502/GA503 2021-07-14 16:55:57 +02:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00