George Cherian 1ecbd7170d ACPI / CPPC: Fix KASAN global out of bounds warning ... Default value of pcc_subspace_idx is -1. Make sure to check pcc_subspace_idx before using the same as array index. This will avoid following KASAN warnings too. [ 15.113449] ================================================================== [ 15.116983] BUG: KASAN: global-out-of-bounds in cppc_get_perf_caps+0xf3/0x3b0 [ 15.116983] Read of size 8 at addr ffffffffb9a5c0d8 by task swapper/0/1 [ 15.116983] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 4.15.0-rc2+ #2 [ 15.116983] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.2.8 01/26/2016 [ 15.116983] Call Trace: [ 15.116983] dump_stack+0x7c/0xbb [ 15.116983] print_address_description+0x1df/0x290 [ 15.116983] kasan_report+0x28a/0x370 [ 15.116983] ? cppc_get_perf_caps+0xf3/0x3b0 [ 15.116983] cppc_get_perf_caps+0xf3/0x3b0 [ 15.116983] ? cpc_read+0x210/0x210 [ 15.116983] ? __rdmsr_on_cpu+0x90/0x90 [ 15.116983] ? rdmsrl_on_cpu+0xa9/0xe0 [ 15.116983] ? rdmsr_on_cpu+0x100/0x100 [ 15.116983] ? wrmsrl_on_cpu+0x9c/0xd0 [ 15.116983] ? wrmsrl_on_cpu+0x9c/0xd0 [ 15.116983] ? wrmsr_on_cpu+0xe0/0xe0 [ 15.116983] __intel_pstate_cpu_init.part.16+0x3a2/0x530 [ 15.116983] ? intel_pstate_init_cpu+0x197/0x390 [ 15.116983] ? show_no_turbo+0xe0/0xe0 [ 15.116983] ? __lockdep_init_map+0xa0/0x290 [ 15.116983] intel_pstate_cpu_init+0x30/0x60 [ 15.116983] cpufreq_online+0x155/0xac0 [ 15.116983] cpufreq_add_dev+0x9b/0xb0 [ 15.116983] subsys_interface_register+0x1ae/0x290 [ 15.116983] ? bus_unregister_notifier+0x40/0x40 [ 15.116983] ? mark_held_locks+0x83/0xb0 [ 15.116983] ? _raw_write_unlock_irqrestore+0x32/0x60 [ 15.116983] ? intel_pstate_setup+0xc/0x104 [ 15.116983] ? intel_pstate_setup+0xc/0x104 [ 15.116983] ? cpufreq_register_driver+0x1ce/0x2b0 [ 15.116983] cpufreq_register_driver+0x1ce/0x2b0 [ 15.116983] ? intel_pstate_setup+0x104/0x104 [ 15.116983] intel_pstate_register_driver+0x3a/0xa0 [ 15.116983] intel_pstate_init+0x3c4/0x434 [ 15.116983] ? intel_pstate_setup+0x104/0x104 [ 15.116983] ? intel_pstate_setup+0x104/0x104 [ 15.116983] do_one_initcall+0x9c/0x206 [ 15.116983] ? parameq+0xa0/0xa0 [ 15.116983] ? initcall_blacklisted+0x150/0x150 [ 15.116983] ? lock_downgrade+0x2c0/0x2c0 [ 15.116983] kernel_init_freeable+0x327/0x3f0 [ 15.116983] ? start_kernel+0x612/0x612 [ 15.116983] ? _raw_spin_unlock_irq+0x29/0x40 [ 15.116983] ? finish_task_switch+0xdd/0x320 [ 15.116983] ? finish_task_switch+0x8e/0x320 [ 15.116983] ? rest_init+0xd0/0xd0 [ 15.116983] kernel_init+0xf/0x11a [ 15.116983] ? rest_init+0xd0/0xd0 [ 15.116983] ret_from_fork+0x24/0x30 [ 15.116983] The buggy address belongs to the variable: [ 15.116983] __key.36299+0x38/0x40 [ 15.116983] Memory state around the buggy address: [ 15.116983] ffffffffb9a5bf80: fa fa fa fa 00 fa fa fa fa fa fa fa 00 fa fa fa [ 15.116983] ffffffffb9a5c000: fa fa fa fa 00 fa fa fa fa fa fa fa 00 fa fa fa [ 15.116983] >ffffffffb9a5c080: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 00 00 [ 15.116983] ^ [ 15.116983] ffffffffb9a5c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.116983] ffffffffb9a5c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.116983] ================================================================== Fixes: 85b1407bf6 (ACPI / CPPC: Make CPPC ACPI driver aware of PCC subspace IDs) Reported-by: Changbin Du <changbin.du@intel.com> Signed-off-by: George Cherian <george.cherian@cavium.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2017-12-05 23:25:49 +01:00
..
acpica	Merge branch 'acpica'	2017-11-13 01:36:58 +01:00
apei	ACPI updates for v4.15-rc1	2017-11-13 20:08:22 -08:00
arm64	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
dptf	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nfit	libnvdimm for 4.15	2017-11-17 09:51:57 -08:00
pmic	- New Drivers	2017-11-16 09:15:57 -08:00
x86	ACPI / x86: Extend KIOX000A quirk to cover all affected BIOS versions	2017-10-21 13:24:53 +02:00
ac.c	ACPI: Mark expected switch fall-throughs	2017-11-09 00:55:16 +01:00
acpi_amba.c
acpi_apd.c	ACPI / APD: Add clock frequency for ThunderX2 I2C controller	2017-10-17 23:52:54 +02:00
acpi_cmos_rtc.c
acpi_configfs.c	ACPI: configfs: make config_item_type const	2017-10-19 16:15:29 +02:00
acpi_dbg.c
acpi_extlog.c
acpi_ipmi.c
acpi_lpat.c
acpi_lpit.c	ACPI / LPIT: Add Low Power Idle Table (LPIT) support	2017-10-11 15:38:10 +02:00
acpi_lpss.c	ACPI updates for v4.15-rc1	2017-11-13 20:08:22 -08:00
acpi_memhotplug.c
acpi_pad.c
acpi_platform.c
acpi_pnp.c
acpi_processor.c	ACPI: Mark expected switch fall-throughs	2017-11-09 00:55:16 +01:00
acpi_video.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
acpi_watchdog.c	ACPI / watchdog: properly initialize resources	2017-09-19 01:49:02 +02:00
battery.c	ACPI: make device_attribute const	2017-08-24 03:38:25 +02:00
battery.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bgrt.c
blacklist.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
bus.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
button.c	Modules updates for v4.15	2017-11-15 13:46:33 -08:00
cm_sbs.c
container.c
cppc_acpi.c	ACPI / CPPC: Fix KASAN global out of bounds warning	2017-12-05 23:25:49 +01:00
custom_method.c
debugfs.c
device_pm.c	Merge branch 'pm-core'	2017-11-13 01:41:26 +01:00
device_sysfs.c	ACPI / bus: Leave modalias empty for devices which are not present	2017-11-20 23:48:51 +01:00
dock.c	ACPI: Mark expected switch fall-throughs	2017-11-09 00:55:16 +01:00
ec_sys.c
ec.c	Merge branch 'acpi-ec' into acpi	2017-11-30 13:37:29 +01:00
event.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
evged.c
fan.c
glue.c
hed.c
internal.h	Merge branch 'acpi-ec' into acpi	2017-11-30 13:37:29 +01:00
ioapic.c
irq.c
Kconfig	- New Drivers	2017-11-16 09:15:57 -08:00
Makefile	- New Drivers	2017-11-16 09:15:57 -08:00
numa.c
nvs.c
osi.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
osl.c	ACPI / LPIT: Add Low Power Idle Table (LPIT) support	2017-10-11 15:38:10 +02:00
pci_irq.c
pci_link.c
pci_mcfg.c
pci_root.c	treewide: Consolidate Apple DMI checks	2017-08-03 23:26:22 +02:00
pci_slot.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
power.c
proc.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
processor_core.c
processor_driver.c
processor_idle.c	Revert "x86/mm: Stop calling leave_mm() in idle code"	2017-11-04 15:01:50 +01:00
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
processor_thermal.c
processor_throttling.c
property.c	ACPI: properties: Fix __acpi_node_get_property_reference() return codes	2017-10-11 21:16:37 +02:00
reboot.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
resource.c	ACPI: Mark expected switch fall-throughs	2017-11-09 00:55:16 +01:00
sbs.c	Merge branches 'acpi-video', 'acpi-battery', 'acpi-spcr' and 'acpi-misc'	2017-09-03 23:54:29 +02:00
sbshc.c
sbshc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
scan.c	Merge branch 'acpi-ec' into acpi	2017-11-30 13:37:29 +01:00
sleep.c	ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell XPS13 9360	2017-11-06 23:56:57 +01:00
sleep.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
spcr.c	Merge branches 'acpi-video', 'acpi-battery', 'acpi-spcr' and 'acpi-misc'	2017-09-03 23:54:29 +02:00
sysfs.c	Modules updates for v4.15	2017-11-15 13:46:33 -08:00
tables.c
thermal.c	dmi: Mark all struct dmi_system_id instances const	2017-09-14 11:59:30 +02:00
utils.c	ACPI / utils: Fix memory leak in acpi_evaluate_reference() error path	2017-11-14 12:54:55 +01:00
video_detect.c
wakeup.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00