Vasily Khoruzhick e5f516b24c ACPI: FPDT: properly handle invalid FPDT subtables ... commit a83c68a3bf upstream. Buggy BIOSes may have invalid FPDT subtables, e.g. on my hardware: S3PT subtable: 7F20FE30: 53 33 50 54 24 00 00 00-00 00 00 00 00 00 18 01 *S3PT$...........* 7F20FE40: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 *................* 7F20FE50: 00 00 00 00 Here the first record has zero length. FBPT subtable: 7F20FE50: 46 42 50 54-3C 00 00 00 46 42 50 54 *....FBPT<...FBPT* 7F20FE60: 02 00 30 02 00 00 00 00-00 00 00 00 00 00 00 00 *..0.............* 7F20FE70: 2A A6 BC 6E 0B 00 00 00-1A 44 41 70 0B 00 00 00 **..n.....DAp....* 7F20FE80: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 *................* And here FBPT table has FBPT signature repeated instead of the first record. Current code will be looping indefinitely due to zero length records, so break out of the loop if record length is zero. While we are here, add proper handling for fpdt_process_subtable() failures. Fixes: d1eb86e59b ("ACPI: tables: introduce support for FPDT table") Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> [ rjw: Comment edit, added empty code lines ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-28 17:20:03 +00:00
..
acpica	ACPICA: Add AML_NO_OPERAND_RESOLVE flag to Timer	2023-07-10 18:49:16 +02:00
apei	ACPI: APEI: Fix AER info corruption when error status data has multiple sections	2023-11-28 17:19:37 +00:00
arm64	Char/Misc driver changes for 6.6-rc1	2023-09-01 09:53:54 -07:00
dptf
nfit	ACPI: NFIT: Install Notify() handler before getting NFIT table	2023-10-22 12:47:43 +02:00
numa	ACPI/NUMA: Apply SRAT proximity domain to entire CFMWS window	2023-11-20 11:58:53 +01:00
pmic
riscv	drivers/acpi: RISC-V: Add RHCT related code	2023-06-01 08:45:04 -07:00
x86	Merge branch 'acpi-pm'	2023-08-25 20:55:47 +02:00
ac.c	ACPI: AC: Install Notify() handler directly	2023-07-14 18:58:34 +02:00
acpi_adxl.c
acpi_apd.c
acpi_cmos_rtc.c	ACPI: TAD: Install SystemCMOS address space handler for ACPI000E	2023-08-17 20:01:24 +02:00
acpi_configfs.c
acpi_dbg.c
acpi_extlog.c	ACPI: extlog: Fix finding the generic error data for v3 structure	2023-08-17 19:44:22 +02:00
acpi_ffh.c	ACPI: FFH: Drop the inclusion of linux/arm-smccc.h	2023-06-12 19:28:20 +02:00
acpi_fpdt.c	ACPI: FPDT: properly handle invalid FPDT subtables	2023-11-28 17:20:03 +00:00
acpi_ipmi.c
acpi_lpat.c
acpi_lpit.c
acpi_lpss.c	ACPI: LPSS: Add pwm_lookup_table entry for second PWM on CHT/BSW devices	2023-05-19 20:17:10 +02:00
acpi_memhotplug.c	mm/memory_hotplug: allow memmap on memory hotplug request to fallback	2023-08-21 13:37:48 -07:00
acpi_pad.c	ACPI: PAD: mark Zhaoxin CPUs NONSTOP TSC correctly	2023-06-12 19:25:55 +02:00
acpi_pcc.c
acpi_platform.c	ACPI: platform: Move SMB0001 HID to the header and reuse	2023-07-04 19:28:20 +02:00
acpi_pnp.c
acpi_processor.c	cpu-hotplug: Provide prototypes for arch CPU registration	2023-10-11 14:27:37 +02:00
acpi_tad.c	ACPI: TAD: Install SystemCMOS address space handler for ACPI000E	2023-08-17 20:01:24 +02:00
acpi_video.c	ACPI: video: Fix NULL pointer dereference in acpi_video_bus_add()	2023-09-25 11:53:40 +02:00
acpi_watchdog.c
battery.c	ACPI: battery: Install Notify() handler directly	2023-07-14 18:58:34 +02:00
bgrt.c
blacklist.c
bus.c	ACPI: bus: Move acpi_arm_init() to the place of after acpi_ghes_init()	2023-10-18 13:26:30 +02:00
button.c	Merge branches 'acpi-thermal' and 'acpi-button'	2023-06-26 17:20:28 +02:00
container.c
cppc_acpi.c
custom_method.c
debugfs.c
device_pm.c
device_sysfs.c	ACPI: sysfs: Fix create_pnp_modalias() and create_of_modalias()	2023-11-20 11:59:03 +01:00
dock.c
ec_sys.c
ec.c	ACPI: EC: Add quirk for HP 250 G7 Notebook PC	2023-11-28 17:19:38 +00:00
event.c
evged.c
fan_attr.c
fan_core.c
fan.h
glue.c
hed.c	ACPI: HED: Install Notify() handler directly	2023-07-14 18:58:34 +02:00
internal.h	Merge branches 'acpi-scan', 'acpi-tad', 'acpi-extlog' and 'acpi-misc'	2023-08-25 20:49:52 +02:00
ioapic.c
irq.c	ACPI: irq: Fix incorrect return value in acpi_register_gsi()	2023-10-18 13:11:04 +02:00
Kconfig	acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers	2023-08-22 10:39:26 +02:00
Makefile	ACPI: Move AMBA bus scan handling into arm64 specific directory	2023-08-01 13:59:25 +02:00
nvs.c
osi.c
osl.c	ACPI: OSL: Make should_use_kmap() 0 for RISC-V	2023-06-01 08:45:00 -07:00
pci_irq.c
pci_link.c
pci_mcfg.c
pci_root.c
pci_slot.c
pfr_telemetry.c
pfr_update.c
platform_profile.c
power.c
pptt.c
prmt.c	acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers	2023-08-22 10:39:26 +02:00
proc.c
processor_core.c	ACPI: processor: LoongArch: Get physical ID from MADT	2023-08-17 18:39:28 +02:00
processor_driver.c
processor_idle.c	cpuidle, ACPI: Evaluate LPI arch_flags for broadcast timer	2023-10-04 16:31:27 +01:00
processor_pdc.c	ACPI: processor: Fix uninitialized access of buf in acpi_set_pdc_bits()	2023-09-18 12:16:16 +02:00
processor_perflib.c
processor_thermal.c
processor_throttling.c
property.c	ACPI: property: Allow _DSD buffer data only for byte accessors	2023-11-20 11:58:59 +01:00
reboot.c
resource.c	ACPI: resource: Do IRQ override on TongFang GMxXGxx	2023-11-28 17:19:58 +00:00
sbs.c
sbshc.c
sbshc.h
scan.c	IOMMU Updates for Linux v6.6	2023-09-01 16:54:25 -07:00
sleep.c	Merge branches 'acpi-scan', 'acpi-pm', 'acpi-resource' and 'acpi-ec'	2023-06-26 16:54:10 +02:00
sleep.h
spcr.c
sysfs.c
tables.c	ACPI: tables: Print RINTC information when MADT is parsed	2023-06-01 08:44:59 -07:00
thermal.c	thermal: Constify the trip argument of the .get_trend() zone callback	2023-09-11 17:16:40 +02:00
tiny-power-button.c	ACPI: tiny-power-button: Eliminate the driver notify callback	2023-06-16 19:48:09 +02:00
utils.c
video_detect.c	ACPI: video: Add acpi_backlight=vendor quirk for Toshiba Portégé R100	2023-11-20 11:58:59 +01:00
viot.c
wakeup.c