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833a426cc4
linux/drivers/acpi
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Francesco Ruggeri 833a426cc4 ACPI: OSL: only free map once in osl.c 
acpi_os_map_cleanup checks map->refcount outside of acpi_ioremap_lock
before freeing the map. This creates a race condition the can result
in the map being freed more than once.
A panic can be caused by running

for ((i=0; i<10; i++))
do
        for ((j=0; j<100000; j++))
        do
                cat /sys/firmware/acpi/tables/data/BERT >/dev/null
        done &
done

This patch makes sure that only the process that drops the reference
to 0 does the freeing.

Fixes: b7c1fadd6c ("ACPI: Do not use krefs under a mutex in osl.c")
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-11-29 10:31:12 +01:00
..
acpica ACPICA: debugger: remove leading whitespaces when converting a string to a buffer 2019-10-28 22:12:46 +01:00
apei Printk changes for 5.5 2019-11-25 19:40:40 -08:00
arm64 ACPI/IORT: Rename arm_smmu_v3_set_proximity() 'node' local variable 2019-08-05 11:06:34 +01:00
dptf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
nfit ACPI: NFIT: Fix unlock on error in scrub_show() 2019-10-22 11:37:13 +02:00
numa ACPI: HMAT: use %u instead of %d to print u32 values 2019-11-12 10:05:57 +01:00
pmic ACPI / PMIC: Add Cherry Trail Crystal Cove PMIC OpRegion driver 2019-10-25 11:43:08 +02:00
x86 x86/intel: Aggregate big core mobile naming 2019-08-28 11:29:31 +02:00
ac.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
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 i2c: imx: ACPI support for NXP i2c controller 2019-09-13 15:12:38 +01:00
acpi_cmos_rtc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi_configfs.c ACPICA: make acpi_load_table() return table index 2019-10-28 22:12:46 +01:00
acpi_dbg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi_extlog.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 437 2019-06-05 17:37:17 +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 Merge branches 'acpi-pm' and 'pm-pci' 2019-07-08 10:49:36 +02:00
acpi_lpss.c Merge branches 'acpi-utils', 'acpi-platform', 'acpi-video' and 'acpi-doc' 2019-11-26 10:30:49 +01:00
acpi_memhotplug.c mm/memory_hotplug: rename walk_memory_range() and pass start+size instead of pfns 2019-07-18 17:08:06 -07:00
acpi_pad.c ACPI, x86: Add Zhaoxin processors support for NONSTOP TSC 2019-06-22 11:45:57 +02:00
acpi_platform.c ACPI: platform: Unregister stale platform devices 2019-10-17 23:48:39 +02:00
acpi_pnp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi_processor.c ACPI / processor: don't print errors for processorIDs == 0xff 2019-08-09 10:48:34 +02:00
acpi_tad.c ACPI: TAD: Add low-level support for real time capability 2018-10-18 09:11:53 +02:00
acpi_video.c ACPI: video: update doc for acpi_video_bus_DOS() 2019-10-11 11:40:26 +02:00
acpi_watchdog.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
battery.c acpi: Use pr_warn instead of pr_warning 2019-10-18 15:00:19 +02:00
bgrt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
blacklist.c ACPI: blacklist: fix clang warning for unused DMI table 2019-07-11 22:45:00 +02:00
bus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
button.c ACPI: button: Remove unused acpi_lid_notifier_[un]register() functions 2019-10-28 15:40:26 +01:00
cm_sbs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
container.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
cppc_acpi.c ACPI: CPPC: Set pcc_data[pcc_ss_id] to NULL in acpi_cppc_processor_exit() 2019-10-18 10:36:37 +02:00
custom_method.c Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
debugfs.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
device_pm.c Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools' 2019-09-17 09:49:19 +02:00
device_sysfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
dock.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
ec.c ACPI: EC: add support for hardware-reduced systems 2019-10-28 16:00:09 +01:00
event.c ACPI: event: replace strcpy() by strscpy() 2019-04-23 10:54:26 +02:00
evged.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
fan.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
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: EC: add support for hardware-reduced systems 2019-10-28 16:00:09 +01:00
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 Merge branch 'acpi-mm' 2019-11-26 10:31:02 +01:00
Makefile Merge branch 'acpi-mm' 2019-11-26 10:31:02 +01:00
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: only free map once in osl.c 2019-11-29 10:31:12 +01:00
pci_irq.c ACPI / PCI: fix acpi_pci_irq_enable() memory leak 2019-09-03 09:41:25 +02:00
pci_link.c ACPI/PCI: Remove surplus parentheses from a return statement 2019-08-21 00:05:20 +02:00
pci_mcfg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459 2019-06-19 17:09:09 +02:00
pci_root.c PCI: Move ASPM declarations to linux/pci.h 2019-08-28 08:28:39 -05:00
pci_slot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 491 2019-06-19 17:09:52 +02:00
power.c ACPI / PM: Introduce concept of a _PR0 dependent device 2019-06-27 12:31:57 +02:00
pptt.c ACPI/PPTT: Add support for ACPI 6.3 thread flag 2019-08-12 12:59:15 +01:00
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 treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +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: Skip dummy wait if kernel is in guest 2019-10-25 10:33:20 +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: processor: Add QoS requests for all CPUs 2019-10-25 11:33:48 +02:00
processor_thermal.c ACPI: processor: Add QoS requests for all CPUs 2019-10-25 11:33:48 +02:00
processor_throttling.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
property.c Char/Misc driver patches for 5.4-rc1 2019-09-18 11:14:31 -07:00
reboot.c ACPI: Allow CONFIG_PCI to be unset for reboot 2018-12-20 10:19:49 +01:00
resource.c acpi: Use pr_warn instead of pr_warning 2019-10-18 15:00:19 +02:00
sbs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
sbshc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
sbshc.h ACPI: SBS: remove unused const variable 'SMBUS_PEC' 2019-08-23 12:55:09 +02:00
scan.c ACPI: platform: Unregister stale platform devices 2019-10-17 23:48:39 +02:00
sleep.c ACPI: PM: Drop Dell XPS13 9360 from LPS0 Idle _DSM blacklist 2019-10-10 10:50:20 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sysfs.c ACPICA: Rename nameseg length macro/define for clarity 2019-04-09 11:24:48 +02:00
tables.c Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
thermal.c ACPI: thermal: Remove redundant acpi_has_method() calls 2019-09-02 22:52:50 +02:00
utils.c ACPI / utils: Introduce acpi_dev_hid_uid_match() helper 2019-10-15 12:06:23 +02:00
video_detect.c Merge branches 'acpi-utils', 'acpi-video', 'acpi-soc' and 'acpi-button' 2019-05-06 10:50:08 +02:00
wakeup.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00