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1da0b1cd42
linux/drivers
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Mateusz Jończyk 1da0b1cd42 rtc: cmos: take rtc_lock while reading from CMOS 
commit 454f47ff46 upstream.

Reading from the CMOS involves writing to the index register and then
reading from the data register. Therefore access to the CMOS has to be
serialized with rtc_lock. This invocation of CMOS_READ was not
serialized, which could cause trouble when other code is accessing CMOS
at the same time.

Use spin_lock_irq() like the rest of the function.

Nothing in kernel modifies the RTC_DM_BINARY bit, so there could be a
separate pair of spin_lock_irq() / spin_unlock_irq() before doing the
math.

Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Reviewed-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211210200131.153887-2-mat.jonczyk@o2.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-01-27 10:53:42 +01:00
..
accessibility
acpi ACPI: Get acpi_device's parent from the parent field 2021-12-01 09:18:58 +01:00
amba ARM: 9120/1: Revert "amba: make use of -1 IRQs warn" 2021-11-06 14:10:09 +01:00
android binder: fix async_free_space accounting for empty parcels 2022-01-05 12:40:33 +01:00
ata libata: if T_LENGTH is zero, dma direction should be DMA_NONE 2021-12-22 09:30:58 +01:00
atm atm: nicstar: register the interrupt handler in the right place 2021-07-19 09:44:52 +02:00
auxdisplay auxdisplay: ht16k33: Fix frame buffer device blanking 2021-11-18 14:04:24 +01:00
base devtmpfs regression fix: reconfigure on each mount 2022-01-20 09:17:49 +01:00
bcma bcma: Fix memory leak for internally-handled cores 2021-09-15 09:50:45 +02:00
block xen/blkfront: harden blkfront against event channel storms 2021-12-22 09:30:59 +01:00
bluetooth Bluetooth: bfusb: fix division by zero in send path 2022-01-16 09:14:22 +01:00
bus bus: ti-sysc: Fix variable set but not used warning for reinit_modules 2021-12-22 09:30:59 +01:00
cdrom
char random: fix crash on multiple early calls to add_bootloader_randomness() 2022-01-16 09:14:23 +01:00
clk clk: Don't parent clks until the parent is fully registered 2021-12-22 09:30:52 +01:00
clocksource clocksource/drivers/timer-ti-dm: Select TIMER_OF 2021-11-18 14:04:09 +01:00
connector
counter counter: 104-quad-8: Return error when invalid mode during ceiling_write 2021-09-15 09:50:38 +02:00
cpufreq cpufreq: Fix get_cpu_device() failure in add_cpu_dev_symlink() 2021-12-08 09:03:21 +01:00
cpuidle cpuidle: Fix kobject memory leaks in error paths 2021-11-18 14:04:05 +01:00
crypto crypto: qat - disregard spurious PFVF interrupts 2021-11-18 14:04:06 +01:00
dax
dca
devfreq PM / devfreq: Add missing error code in devfreq_add_device() 2021-07-14 16:56:11 +02:00
dio
dma dmaengine: st_fdma: fix MODULE_ALIAS 2021-12-22 09:30:53 +01:00
dma-buf dma-buf: WARN on dmabuf release with pending attachments 2021-11-18 14:03:52 +01:00
edac EDAC/amd64: Handle three rank interleaving mode 2021-11-18 14:04:06 +01:00
eisa
extcon extcon: intel-mrfld: Sync hardware and software state on init 2021-07-19 09:45:00 +02:00
firewire
firmware firmware: qemu_fw_cfg: fix kobject leak in probe error path 2022-01-20 09:17:51 +01:00
fpga fpga: machxo2-spi: Fix missing error code in machxo2_write_complete() 2021-09-30 10:11:04 +02:00
fsi fsi: Add missing MODULE_DEVICE_TABLE 2021-07-20 16:05:42 +02:00
gnss
gpio gpio: dln2: Fix interrupts when replugging the device 2021-12-29 12:26:03 +01:00
gpu drm/i915: Avoid bitwise vs logical OR warning in snb_wm_latency_quirk() 2022-01-16 09:14:24 +01:00
greybus
hid HID: wacom: Avoid using stale array indicies to read contact count 2022-01-27 10:53:40 +01:00
hsi
hv hyperv/vmbus: include linux/bitops.h 2021-11-18 14:03:42 +01:00
hwmon hwmon: (lm90) Do not report 'busy' status bit as alarm 2021-12-29 12:26:07 +01:00
hwspinlock
hwtracing coresight: cti: Correct the parameter for pm_runtime_put 2021-11-18 14:03:51 +01:00
i2c i2c: validate user data in compat ioctl 2022-01-05 12:40:32 +01:00
i3c
ide
idle
iio iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove 2021-12-14 11:32:45 +01:00
infiniband RDMA/uverbs: Check for null return of kmalloc_array 2022-01-11 15:24:59 +01:00
input Input: zinitix - make sure the IRQ is allocated before it gets enabled 2022-01-11 15:25:02 +01:00
interconnect treewide: Change list_sort to use const pointers 2021-09-30 10:11:04 +02:00
iommu iommu/amd: Clarify AMD IOMMUv2 initialization messages 2021-12-01 09:19:09 +01:00
ipack ipack: ipoctal: fix module reference leak 2021-10-06 15:56:01 +02:00
irqchip irqchip: nvic: Fix offset for Interrupt Priority Offsets 2021-12-14 11:32:46 +01:00
isdn mISDN: change function names to avoid conflicts 2022-01-11 15:25:02 +01:00
leds leds: trigger: audio: Add an activate callback to ensure the initial brightness is set 2021-09-15 09:50:36 +02:00
lightnvm
macintosh
mailbox soc: mediatek: cmdq: add address shift in jump 2021-09-18 13:40:16 +02:00
mcb mcb: fix error handling in mcb_alloc_bus() 2021-09-30 10:11:00 +02:00
md md: revert io stats accounting 2022-01-16 09:14:21 +01:00
media media: uvcvideo: fix division by zero at stream start 2022-01-20 09:17:50 +01:00
memory memory: fsl_ifc: fix leak of irq and nand_irq in fsl_ifc_ctrl_probe 2021-11-18 14:04:16 +01:00
memstick memstick: jmb38x_ms: use appropriate free function in jmb38x_ms_alloc_host() 2021-11-18 14:04:07 +01:00
message
mfd mfd: intel-lpss: Fix too early PM enablement in the ACPI ->probe() 2022-01-16 09:14:23 +01:00
misc misc: fastrpc: fix improper packet size calculation 2021-12-14 11:32:46 +01:00
mmc mmc: sdhci-pci: Add PCI ID for Intel ADL 2022-01-16 09:14:23 +01:00
most most: fix control-message timeouts 2021-11-18 14:03:51 +01:00
mtd mtd: rawnand: davinci: Rewrite function description 2022-01-27 10:53:41 +01:00
mux
net rtlwifi: rtl8192cu: Fix WARNING when calling local_irq_restore() with interrupts enabled 2022-01-20 09:17:51 +01:00
nfc NFC: st21nfca: Fix memory leak in device probe and remove 2022-01-05 12:40:31 +01:00
ntb NTB: perf: Fix an error code in perf_setup_inbuf() 2021-09-22 12:28:02 +02:00
nubus
nvdimm libnvdimm/pmem: Fix crash triggered when I/O in-flight during unbind 2021-09-18 13:40:36 +02:00
nvme nvmet: use IOCB_NOWAIT only if the filesystem supports it 2021-12-01 09:19:07 +01:00
nvmem nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells 2021-10-20 11:45:01 +02:00
of of: unittest: fix EXPECT text for gpio hog errors 2021-11-18 14:04:13 +01:00
opp opp: Fix return in _opp_add_static_v2() 2021-11-18 14:04:22 +01:00
oprofile
parisc parisc: Move pci_dev_is_behind_card_dino to where it is used 2021-09-26 14:08:59 +02:00
parport parport: remove non-zero check on count 2021-09-18 13:40:34 +02:00
pci PCI/MSI: Mask MSI-X vectors only on success 2021-12-22 09:30:57 +01:00
pcmcia pcmcia: i82092: fix a null pointer dereference bug 2021-08-12 13:22:16 +02:00
perf perf/arm-cmn: Fix invalid pointer when access dtc object sharing the same IRQ number 2021-07-14 16:56:08 +02:00
phy phy: qcom-snps: Correct the FSEL_MASK 2021-11-18 14:04:20 +01:00
pinctrl pinctrl: mediatek: fix global-out-of-bounds issue 2021-12-29 12:26:07 +01:00
platform platform/x86: apple-gmux: use resource_size() with res 2022-01-05 12:40:29 +01:00
pnp
power power: bq25890: Enable continuous conversion for ADC at charging 2022-01-11 15:25:01 +01:00
powercap
pps
ps3
ptp ptp_pch: Load module automatically if ID matches 2021-10-13 10:04:27 +02:00
pwm pwm: stm32-lp: Don't modify HW state in .remove() callback 2021-09-26 14:09:01 +02:00
rapidio
ras
regulator regulator: s5m8767: do not use reset value as DVS voltage if GPIO DVS is disabled 2021-11-18 14:03:45 +01:00
remoteproc remoteproc: qcom: pil_info: Don't memcpy_toio more than is provided 2022-01-20 09:17:50 +01:00
reset reset: socfpga: add empty driver allowing consumers to probe 2021-11-18 14:03:42 +01:00
rpmsg
rtc rtc: cmos: take rtc_lock while reading from CMOS 2022-01-27 10:53:42 +01:00
s390 s390/cio: make ccw_device_dma_* more robust 2021-11-18 14:04:30 +01:00
sbus
scsi scsi: libiscsi: Fix UAF in iscsi_conn_get_param()/iscsi_conn_teardown() 2022-01-11 15:25:02 +01:00
sfi
sh maple: fix wrong return value of maple_bus_init(). 2021-11-26 10:39:12 +01:00
siox
slimbus slimbus: ngd: reset dma setup during runtime pm 2021-08-26 08:35:55 -04:00
soc soc/tegra: fuse: Fix bitwise vs. logical OR warning 2021-12-22 09:30:54 +01:00
soundwire soundwire: debugfs: use controller id and link_id for debugfs 2021-11-18 14:04:16 +01:00
spi spi: change clk_disable_unprepare to clk_unprepare 2021-12-29 12:25:54 +01:00
spmi
ssb ssb: Fix error return code in ssb_bus_scan() 2021-07-14 16:56:21 +02:00
staging staging: greybus: fix stack size warning with UBSAN 2022-01-16 09:14:24 +01:00
target scsi: target: Fix alua_tg_pt_gps_count tracking 2021-11-26 10:39:11 +01:00
tc
tee tee: optee: Fix incorrect page free bug 2021-12-29 12:26:05 +01:00
thermal thermal: core: Reset previous low and high trip during thermal zone init 2021-12-08 09:03:19 +01:00
thunderbolt thunderbolt: Fix port linking by checking all adapters 2021-09-18 13:40:27 +02:00
tty xen/console: harden hvc_xen against event channel storms 2021-12-22 09:30:59 +01:00
uio
usb USB: Fix "slab-out-of-bounds Write" bug in usb_hcd_poll_rh_status 2022-01-16 09:14:22 +01:00
vdpa vdpa/mlx5: Avoid destroying MR on empty iotlb 2021-08-26 08:35:42 -04:00
vfio vfio: Use config not menuconfig for VFIO_NOIOMMU 2021-09-18 13:40:12 +02:00
vhost vdpa: check that offsets are within bounds 2021-12-22 09:30:51 +01:00
video video: vga16fb: Only probe for EGA and VGA 16 color graphic cards 2022-01-20 09:17:50 +01:00
virt
virtio virtio_ring: Fix querying of maximum DMA mapping size for virtio device 2021-12-22 09:30:51 +01:00
visorbus visorbus: fix error return code in visorchipset_init() 2021-07-14 16:56:41 +02:00
vlynq
vme
w1 w1: ds2438: fixing bug that would always get page0 2021-07-20 16:05:39 +02:00
watchdog ar7: fix kernel builds for compiler test 2021-11-18 14:04:24 +01:00
xen xen: detect uninitialized xenbus in xenbus_init 2021-12-01 09:19:01 +01:00
zorro
Kconfig
Makefile