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linux/drivers/acpi
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Mark Langsdorf d11fdbee28 ACPI: custom_method: fix a possible memory leak 
commit 1cfd895643 upstream.

In cm_write(), if the 'buf' is allocated memory but not fully consumed,
it is possible to reallocate the buffer without freeing it by passing
'*ppos' as 0 on a subsequent call.

Add an explicit kfree() before kzalloc() to prevent the possible memory
leak.

Fixes: 526b4af47f ("ACPI: Split out custom_method functionality into an own driver")
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-11 14:47:12 +02:00
..
acpica
ACPICA: Always create namespace nodes using acpi_ns_create_node()
2021-03-30 14:31:54 +02:00
apei
ACPI, APEI, Fix error return value in apei_map_generic_address()
2020-11-16 19:27:37 +01:00
arm64
arm64: mm: Set ZONE_DMA size based on early IORT scan
2021-03-09 11:11:13 +01:00
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
Merge tag 'acpi-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
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
ACPI: APD: Clean up header file include statements
2020-09-25 12:48:11 +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
Merge tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm
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
Merge tag 'sched-fifo-2020-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2020-08-06 11:55:43 -07:00
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
PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED
2020-04-24 21:34:22 +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
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
Merge tag 'usb-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
2020-10-15 09:51:18 -07:00
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: Fix reference count leak in acpi_cppc_processor_probe()
2020-05-28 13:47:53 +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
PM: ACPI: PCI: Drop acpi_pm_set_bridge_wakeup()
2020-12-30 11:54:05 +01:00
device_sysfs.c
ACPI: sysfs: Prefer "compatible" modalias
2021-02-03 23:28:37 +01:00
dock.c
ACPI: dock: fix enum-conversion warning
2020-10-27 19:30:27 +01:00
ec_sys.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482
2019-06-19 17:09:52 +02:00
ec.c
ACPI: EC: PM: Drop ec_no_wakeup check from acpi_ec_dispatch_gpe()
2020-10-06 12:31:31 +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: fan: Initialize performance state sysfs attribute
2020-11-16 15:18:38 +01:00
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 / PMIC: Move TPS68470 OpRegion driver to drivers/acpi/pmic/
2020-09-15 19:40:59 +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: Fix whitespace inconsistencies
2020-11-09 19:08:06 +01:00
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: Fix build when CONFIG_ACPI_PROCESSOR=m
2021-04-14 08:41:58 +02:00
processor_pdc.c
…
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
Revert "ACPI / resources: Use AE_CTRL_TERMINATE to terminate resources walks"
2020-12-30 11:54:06 +01:00
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: Use unique number for instance_no
2021-03-30 14:32:06 +02:00
sleep.c
Merge tag 'acpi-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2020-06-02 13:25:52 -07:00
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: Add missing callback back for Sony VPCEH3U1E
2021-03-30 14:31:54 +02:00
wakeup.c
ACPI: Fix whitespace inconsistencies
2020-11-09 19:08:06 +01:00