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linux/drivers/acpi
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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 ACPI: PMIC: Add comments with DSDT power opregion field names 2023-01-30 16:47:13 +01:00
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: processor: Check for null return of devm_kzalloc() in fch_misc_setup() 2023-03-20 18:04:58 +01:00
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: LPIT: move to use bus_get_dev_root() 2023-03-22 20:25:18 +01:00
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: PNP: Introduce list of known non-PNP devices 2023-01-17 12:52:11 +01:00
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 ACPI: CPPC: Add auto select register read/write support 2023-03-17 19:06:23 +01:00
custom_method.c
debugfs.c
device_pm.c PCI/ACPI: Account for _S0W of the target bridge in acpi_pci_bridge_d3() 2023-01-13 15:56:10 -06:00
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 ACPI: Fix selecting wrong ACPI fwnode for the iGPU on some Dell laptops 2023-01-10 20:23:48 +01:00
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 ACPI: Silence missing prototype warnings 2022-12-30 19:12:30 +01:00
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/CXL: Export native CXL error reporting control 2023-01-05 13:31:27 -08:00
pci_slot.c
pfr_telemetry.c mm: replace vma->vm_flags direct modifications with modifier calls 2023-02-09 16:51:39 -08:00
pfr_update.c iov_iter work; most of that is about getting rid of 2022-12-12 18:29:54 -08:00
platform_profile.c
power.c ACPI: PM: Do not turn of unused power resources on the Toshiba Click Mini 2023-04-27 18:44:43 +02:00
pptt.c ACPI: PPTT: Fix to avoid sleep in the atomic context when PPTT is absent 2023-03-14 20:34:38 +01:00
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 ACPI: processor: Reorder acpi_processor_driver_init() 2023-03-22 15:20:38 +01:00
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 ACPI: processor: perflib: Avoid updating frequency QoS unnecessarily 2022-12-30 19:10:02 +01:00
processor_thermal.c ACPI: processor: thermal: Update CPU cooling devices on cpufreq policy changes 2023-03-22 15:20:38 +01:00
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 ACPI: SBS: Fix handling of Smart Battery Selectors 2023-03-30 19:01:05 +02:00
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 ACPI: SPCR: Amend indentation 2023-03-27 20:50:28 +02:00
sysfs.c ACPI: sysfs: Enable ACPI sysfs support for CCEL records 2023-03-27 20:43:58 +02:00
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 ACPI: VIOT: Initialize the correct IOMMU fwspec 2023-03-30 19:20:42 +02:00
wakeup.c