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Armin Wolf c8ae6a1870 hwmon: (gpio-fan) Fix array out of bounds access 
[ Upstream commit f233d2be38dbbb22299192292983037f01ab363c ]

The driver does not check if the cooling state passed to
gpio_fan_set_cur_state() exceeds the maximum cooling state as
stored in fan_data->num_speeds. Since the cooling state is later
used as an array index in set_fan_speed(), an array out of bounds
access can occur.
This can be exploited by setting the state of the thermal cooling device
to arbitrary values, causing for example a kernel oops when unavailable
memory is accessed this way.

Example kernel oops:
[  807.987276] Unable to handle kernel paging request at virtual address ffffff80d0588064
[  807.987369] Mem abort info:
[  807.987398]   ESR = 0x96000005
[  807.987428]   EC = 0x25: DABT (current EL), IL = 32 bits
[  807.987477]   SET = 0, FnV = 0
[  807.987507]   EA = 0, S1PTW = 0
[  807.987536]   FSC = 0x05: level 1 translation fault
[  807.987570] Data abort info:
[  807.987763]   ISV = 0, ISS = 0x00000005
[  807.987801]   CM = 0, WnR = 0
[  807.987832] swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000001165000
[  807.987872] [ffffff80d0588064] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
[  807.987961] Internal error: Oops: 96000005 [#1] PREEMPT SMP
[  807.987992] Modules linked in: cmac algif_hash aes_arm64 algif_skcipher af_alg bnep hci_uart btbcm bluetooth ecdh_generic ecc 8021q garp stp llc snd_soc_hdmi_codec brcmfmac vc4 brcmutil cec drm_kms_helper snd_soc_core cfg80211 snd_compress bcm2835_codec(C) snd_pcm_dmaengine syscopyarea bcm2835_isp(C) bcm2835_v4l2(C) sysfillrect v4l2_mem2mem bcm2835_mmal_vchiq(C) raspberrypi_hwmon sysimgblt videobuf2_dma_contig videobuf2_vmalloc fb_sys_fops videobuf2_memops rfkill videobuf2_v4l2 videobuf2_common i2c_bcm2835 snd_bcm2835(C) videodev snd_pcm snd_timer snd mc vc_sm_cma(C) gpio_fan uio_pdrv_genirq uio drm fuse drm_panel_orientation_quirks backlight ip_tables x_tables ipv6
[  807.988508] CPU: 0 PID: 1321 Comm: bash Tainted: G         C        5.15.56-v8+ #1575
[  807.988548] Hardware name: Raspberry Pi 3 Model B Rev 1.2 (DT)
[  807.988574] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  807.988608] pc : set_fan_speed.part.5+0x34/0x80 [gpio_fan]
[  807.988654] lr : gpio_fan_set_cur_state+0x34/0x50 [gpio_fan]
[  807.988691] sp : ffffffc008cf3bd0
[  807.988710] x29: ffffffc008cf3bd0 x28: ffffff80019edac0 x27: 0000000000000000
[  807.988762] x26: 0000000000000000 x25: 0000000000000000 x24: ffffff800747c920
[  807.988787] x23: 000000000000000a x22: ffffff800369f000 x21: 000000001999997c
[  807.988854] x20: ffffff800369f2e8 x19: ffffff8002ae8080 x18: 0000000000000000
[  807.988877] x17: 0000000000000000 x16: 0000000000000000 x15: 000000559e271b70
[  807.988938] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
[  807.988960] x11: 0000000000000000 x10: ffffffc008cf3c20 x9 : ffffffcfb60c741c
[  807.989018] x8 : 000000000000000a x7 : 00000000ffffffc9 x6 : 0000000000000009
[  807.989040] x5 : 000000000000002a x4 : 0000000000000000 x3 : ffffff800369f2e8
[  807.989062] x2 : 000000000000e780 x1 : 0000000000000001 x0 : ffffff80d0588060
[  807.989084] Call trace:
[  807.989091]  set_fan_speed.part.5+0x34/0x80 [gpio_fan]
[  807.989113]  gpio_fan_set_cur_state+0x34/0x50 [gpio_fan]
[  807.989199]  cur_state_store+0x84/0xd0
[  807.989221]  dev_attr_store+0x20/0x38
[  807.989262]  sysfs_kf_write+0x4c/0x60
[  807.989282]  kernfs_fop_write_iter+0x130/0x1c0
[  807.989298]  new_sync_write+0x10c/0x190
[  807.989315]  vfs_write+0x254/0x378
[  807.989362]  ksys_write+0x70/0xf8
[  807.989379]  __arm64_sys_write+0x24/0x30
[  807.989424]  invoke_syscall+0x4c/0x110
[  807.989442]  el0_svc_common.constprop.3+0xfc/0x120
[  807.989458]  do_el0_svc+0x2c/0x90
[  807.989473]  el0_svc+0x24/0x60
[  807.989544]  el0t_64_sync_handler+0x90/0xb8
[  807.989558]  el0t_64_sync+0x1a0/0x1a4
[  807.989579] Code: b9403801 f9402800 7100003f 8b35cc00 (b9400416)
[  807.989627] ---[ end trace 8ded4c918658445b ]---

Fix this by checking the cooling state and return an error if it
exceeds the maximum cooling state.

Tested on a Raspberry Pi 3.

Fixes: b5cf88e46bad ("(gpio-fan): Add thermal control hooks")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20220830011101.178843-1-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-09-15 12:17:03 +02:00
..
pmbus
hwmon: (pmbus) Add Vin unit off handling
2022-04-15 14:14:44 +02:00
ab8500.c
…
abituguru3.c
…
abituguru.c
…
abx500.c
hwmon: (abx500) drop the use of IRQF_NO_SUSPEND
2015-10-14 07:57:14 -07:00
abx500.h
…
acpi_power_meter.c
hwmon: (acpi_power_meter) Fix potential memory leak in acpi_power_meter_add()
2020-07-09 09:37:11 +02:00
ad7314.c
hwmon: (ad7314) Convert to devm_hwmon_device_register_with_groups
2016-06-27 18:58:03 -07:00
ad7414.c
hwmon: (ad7414) Add OF device ID table
2017-04-02 07:01:53 -07:00
ad7418.c
…
adc128d818.c
hwmon: (adc128d818) constify attribute_group structures.
2017-08-13 08:24:38 -07:00
adcxx.c
spi: Drop owner assignment from spi_drivers
2015-10-28 10:30:17 +09:00
adm1021.c
hwmon: (adm1021) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
adm1025.c
hwmon: (adm1025) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
adm1026.c
hwmon: (adm1026) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
adm1029.c
…
adm1031.c
hwmon: (adm1031) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
adm9240.c
hwmon: (adm9240) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
ads1015.c
hwmon: (ads1015) Convert to using %pOF instead of full_name
2017-08-13 08:24:38 -07:00
ads7828.c
hwmon: (ads7828) Accept optional parameters from device tree
2017-04-02 07:01:53 -07:00
ads7871.c
hwmon: (ads7871) Convert to devm_hwmon_device_register_with_groups
2016-06-27 18:58:03 -07:00
adt7x10.c
hwmon: (adt7x10) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
adt7x10.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
adt7310.c
spi: Drop owner assignment from spi_drivers
2015-10-28 10:30:17 +09:00
adt7410.c
…
adt7411.c
hwmon: (adt7411) add min, max and alarm attributes
2017-01-02 10:19:45 -08:00
adt7462.c
hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT()
2020-03-11 14:15:12 +01:00
adt7470.c
hwmon: (adt7470) Fix warning on module removal
2022-05-12 12:20:24 +02:00
adt7475.c
hwmon: (adt7475) Make volt2reg return same reg as reg2volt input
2020-01-29 16:43:18 +01:00
amc6821.c
hwmon: (amc6821) sign extension temperature
2016-12-02 13:28:04 -08:00
applesmc.c
hwmon: (applesmc) check status earlier.
2020-09-09 19:04:23 +02:00
asb100.c
hwmon: (asb100) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
asc7621.c
hwmon: (asc7621) remove redundant assignment to newval
2017-10-29 18:36:03 -07:00
aspeed-pwm-tacho.c
hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow
2020-07-29 10:16:53 +02:00
asus_atk0110.c
hwmon: (asus_atk0110) Make use of device managed memory
2018-06-01 09:38:36 -07:00
atxp1.c
hwmon: (atxp1) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
coretemp.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
da9052-hwmon.c
hwmon: (da9052) Synchronize access with mfd
2020-05-20 08:18:44 +02:00
da9055-hwmon.c
…
dell-smm-hwmon.c
hwmon: (dell-smm) Speed up setting of fan speed
2022-02-16 12:51:47 +01:00
dme1737.c
hwmon: (dme1737) Fix overflows seen when writing into limit attributes
2017-01-10 08:57:55 -08:00
ds620.c
hwmon: (ds620) move header file out of I2C realm
2017-06-11 17:08:19 -07:00
ds1621.c
hwmon: (ds1621) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
emc6w201.c
hwmon: (emcw201) Fix overflows seen when writing into limit attributes
2016-12-12 11:33:44 -08:00
emc1403.c
hwmon: Mark expected switch fall-throughs
2018-07-08 20:08:13 -07:00
emc2103.c
hwmon: (emc2103) fix unable to change fan pwm1_enable attribute
2020-07-22 09:32:11 +02:00
f71805f.c
hwmon: (f71805f) Use request_muxed_region for Super-IO accesses
2019-05-31 06:46:22 -07:00
f71882fg.c
hwmon: (f71882fg) Fix negative temperature
2022-05-18 09:42:48 +02:00
f75375s.c
…
fam15h_power.c
hwmon: (fam15h_power) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
fschmd.c
hwmon: (fschmd) fix typo 'can by' to 'can be'
2018-05-21 07:51:59 -07:00
ftsteutates.c
hwmon: (ftsteutates) constify i2c_device_id
2017-08-29 17:44:23 -07:00
g760a.c
hwmon: (g760a) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
g762.c
hwmon: (g762) handle cleanup with devm_add_action
2018-03-10 19:00:14 -08:00
gl518sm.c
hwmon: (gl518sm) Fix overflows seen when writing into limit attributes
2017-01-10 08:58:36 -08:00
gl520sm.c
hwmon: (gl520sm) Fix overflows and crash seen when writing into limit attributes
2017-01-10 08:59:35 -08:00
gpio-fan.c
hwmon: (gpio-fan) Fix array out of bounds access
2022-09-15 12:17:03 +02:00
hih6130.c
hwmon: (hih6130) Fix documentation of struct hih6130
2018-01-02 15:05:34 -08:00
hwmon-vid.c
x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping
2018-02-15 01:15:52 +01:00
hwmon.c
Revert "hwmon: Make chip parameter for with_info API mandatory"
2022-06-25 11:49:18 +02:00
i5k_amb.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
i5500_temp.c
hwmon: (i5500_temp) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
ibmaem.c
hwmon: (ibmaem) don't call platform_device_del() if platform_device_add() fails
2022-07-07 17:35:11 +02:00
ibmpex.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
ibmpowernv.c
hwmon: (ibmpowernv) Remove bogus __init annotations
2018-11-27 16:13:04 +01:00
iio_hwmon.c
hwmon: (iio_hwmon) Use devm functions
2018-07-23 11:38:33 -07:00
ina2xx.c
hwmon: (ina2xx) Fix current value calculation
2018-12-17 09:24:32 +01:00
ina209.c
hwmon: (ina209) Handled signed registers
2017-04-21 12:30:09 -07:00
ina3221.c
hwmon: (ina3221) Fix INA3221_CONFIG_MODE macros
2019-11-24 08:21:01 +01:00
it87.c
hwmon: (it87) Reapply probe path chip registers settings after resume
2017-08-13 08:24:38 -07:00
jc42.c
hwmon: (jc42) Fix name to have no illegal characters
2020-05-02 17:26:00 +02:00
jz4740-hwmon.c
hwmon: (jz4740) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
k8temp.c
x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping
2018-02-15 01:15:52 +01:00
k10temp.c
hwmon/k10temp, x86/amd_nb: Consolidate shared device IDs
2020-06-22 09:05:23 +02:00
Kconfig
hwmon: (ltq-cputemp) restrict it to SOC_XWAY
2022-05-18 09:42:48 +02:00
lineage-pem.c
…
lm63.c
hwmon: (lm63) Add OF device ID table
2017-04-02 07:01:53 -07:00
lm70.c
hwmon: (lm70) Add support for TI TMP122/124
2017-01-21 12:26:38 -08:00
lm73.c
…
lm75.c
hwmon: (lm75) Fix write operations for negative temperatures
2020-01-27 14:51:08 +01:00
lm75.h
…
lm77.c
…
lm78.c
hwmon: (lm78) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
lm80.c
Revert "hwmon: (lm80) fix a missing check of bus read in lm80 probe"
2021-05-26 11:48:34 +02:00
lm83.c
hwmon: (lm83) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
lm85.c
hwmon: (lm85) Add OF device ID table
2017-04-02 07:01:53 -07:00
lm87.c
hwmon: (lm87) Add OF device ID table
2017-04-13 06:09:26 -07:00
lm90.c
hwmon: (lm90) Reduce maximum conversion rate for G781
2022-02-08 18:23:08 +01:00
lm92.c
hwmon: (lm92) Add max6635 to lm92_id[]
2018-03-22 09:33:24 -07:00
lm93.c
hwmon: (lm93) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
lm95234.c
hwmon: (lm95234) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
lm95241.c
hwmon: (lm95241) Update module description to include LM95231
2016-09-13 07:28:01 -07:00
lm95245.c
hwmon: (lm95245) Add OF device ID table
2017-04-02 07:01:53 -07:00
ltc2945.c
…
ltc2990.c
hwmon: (ltc2990) support all measurement modes
2018-05-21 07:52:01 -07:00
ltc4151.c
hwmon: (ltc4151) Export OF device ID table as module aliases
2017-01-21 08:57:41 -08:00
ltc4215.c
…
ltc4222.c
…
ltc4245.c
hwmon: (ltc4245) move header file out of I2C realm
2017-06-11 17:08:19 -07:00
ltc4260.c
…
ltc4261.c
…
ltq-cputemp.c
hwmon: (ltq-cputemp) add cpu temp sensor driver
2017-09-01 07:24:14 -07:00
Makefile
ARM: SoC driver updates
2018-08-23 13:52:46 -07:00
max197.c
headers: separate linux/mod_devicetable.h from linux/platform_device.h
2018-07-07 17:52:26 +02:00
max1111.c
hwmon: (max1111) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
max1619.c
hwmon: (max1619) Add dt binding
2017-10-29 18:36:03 -07:00
max1668.c
…
max6621.c
hwmon: (max6621) Inverted if condition in max6621_read()
2017-10-29 18:36:03 -07:00
max6639.c
hwmon: (max6639) move header file out of I2C realm
2017-06-11 17:08:19 -07:00
max6642.c
…
max6650.c
hwmon: (max6650) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
max6697.c
hwmon: (max6697) Make sure the OVERT mask is set correctly
2020-07-09 09:37:10 +02:00
max16065.c
…
max31722.c
hwmon: (max31722) Remove non-standard ACPI device IDs
2021-07-20 16:15:48 +02:00
max31790.c
hwmon: (max31790) Fix fan speed reporting for fan7..12
2021-07-20 16:15:48 +02:00
mc13783-adc.c
headers: separate linux/mod_devicetable.h from linux/platform_device.h
2018-07-07 17:52:26 +02:00
mcp3021.c
hwmon: (mcp3021) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
menf21bmc_hwmon.c
…
mlxreg-fan.c
hwmon: (mlxreg-fan) Return non-zero value when fan current state is enforced from sysfs
2021-10-06 15:31:22 +02:00
nct6683.c
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
nct6775.c
hwmon: (nct6775) Fix names of DIMM temperature sources
2019-11-24 08:21:00 +01:00
nct7802.c
hwmon: (nct7802) Fix voltage limits to wrong registers
2020-01-29 16:43:21 +01:00
nct7904.c
hwmon: (nct7904) Fix UNSPECIFIED_INT warning
2018-07-08 20:08:13 -07:00
npcm750-pwm-fan.c
hwmon: (npcm-750-pwm-fan) Change initial pwm target to 255
2019-11-24 08:21:01 +01:00
nsa320-hwmon.c
hwmon: (nsa320) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
ntc_thermistor.c
hwmon: (ntc_thermistor) Use devm_hwmon_device_register_with_groups
2016-09-08 21:34:15 -07:00
pc87360.c
hwmon: (pc87360) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
pc87427.c
hwmon: (pc87427) Use request_muxed_region for Super-IO accesses
2019-05-31 06:46:22 -07:00
pcf8591.c
hwmon: (pcf8591) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
powr1220.c
…
pwm-fan.c
hwmon: (pwm-fan) Silence error on probe deferral
2019-11-24 08:21:00 +01:00
raspberrypi-hwmon.c
hwmon: (raspberrypi) Fix initial notify
2018-12-17 09:24:31 +01:00
s3c-hwmon.c
…
sch56xx-common.c
hwmon: (sch56xx-common) Replace WDOG_ACTIVE with WDOG_HW_RUNNING
2022-04-15 14:14:43 +02:00
sch56xx-common.h
…
sch5627.c
hwmon: (sch5627) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
sch5636.c
hwmon: (sch5636) trivial fix of spelling mistake on revision
2016-04-25 07:26:29 -07:00
scmi-hwmon.c
hwmon: (scmi) Fix potential buffer overflow in scmi_hwmon_probe()
2020-07-29 10:16:54 +02:00
scpi-hwmon.c
hwmon: (scpi-hwmon) shows the negative temperature properly
2021-06-30 08:48:22 -04:00
sht3x.c
hwmon: (sht3x) wait predefined limits loading complete before access
2018-01-12 14:18:39 -08:00
sht15.c
hwmon: (sht15) Fix parameter documentation of sht15_crc8()
2018-01-02 15:05:34 -08:00
sht21.c
hwmon: (sht21) Update data sheet URLs
2018-03-10 19:00:14 -08:00
shtc1.c
hwmon: (shtc1) fix shtc1 and shtw1 id mask
2020-01-27 14:51:12 +01:00
sis5595.c
hwmon: (sis5595) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
smm665.c
…
smsc47b397.c
hwmon: (smsc47b397) Use request_muxed_region for Super-IO accesses
2019-05-31 06:46:22 -07:00
smsc47m1.c
hwmon: (smsc47m1) Use request_muxed_region for Super-IO accesses
2019-05-31 06:46:22 -07:00
smsc47m192.c
hwmon: (smsc47m192) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
stts751.c
hwmon: (stts751) Fix buffer size passed to snprintf
2017-10-29 18:36:03 -07:00
tc74.c
hwmon: add driver for Microchip TC74
2015-06-21 22:54:53 -07:00
tc654.c
hwmon: Add tc654 driver
2016-12-02 13:28:05 -08:00
thmc50.c
…
tmp102.c
hwmon: (tmp102) Fix first temperature reading
2017-10-24 06:17:14 -07:00
tmp103.c
hwmon: (tmp103) Use SIMPLE_DEV_PM_OPS helper macro
2017-04-24 06:30:41 -07:00
tmp108.c
hwmon: Add Texas Instruments TMP108 temperature sensor driver.
2016-12-09 21:54:25 -08:00
tmp401.c
hwmon: (tmp401) Add OF device ID table
2022-05-18 09:42:47 +02:00
tmp421.c
hwmon: (tmp421) fix rounding for negative values
2021-10-06 15:31:23 +02:00
ultra45_env.c
…
vexpress-hwmon.c
hwmon: (vexpress) rename vexpress hwmon implementation
2016-03-05 06:25:33 -08:00
via686a.c
hwmon: (via686a) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
via-cputemp.c
hwmon: (via-cputemp) support new centaur CPUs
2018-03-30 07:53:57 -07:00
vt1211.c
hwmon: (vt1211) Use request_muxed_region for Super-IO accesses
2019-05-31 06:46:21 -07:00
vt8231.c
hwmon: (vt8231) use permission-specific DEVICE_ATTR variants
2017-01-02 10:19:45 -08:00
w83l785ts.c
…
w83l786ng.c
…
w83627ehf.c
hwmon: (w83627ehf) Use request_muxed_region
2017-04-02 07:01:53 -07:00
w83627hf.c
hwmon: (w83627hf) Use request_muxed_region for Super-IO accesses
2020-01-27 14:50:39 +01:00
w83773g.c
hwmon: (w83773g) Fix fault detection and reporting
2018-01-02 15:05:34 -08:00
w83781d.c
hwmon: (w83781d) Remove duplicate NULL check
2017-11-16 01:01:55 -08:00
w83791d.c
hwmon: (w83791d) Remove duplicate NULL check
2017-11-16 01:02:23 -08:00
w83792d.c
hwmon: (w83792d) Remove duplicate NULL check
2017-11-16 01:02:43 -08:00
w83793.c
hwmon: (w83793) Remove duplicate NULL check
2017-11-16 01:03:19 -08:00
w83795.c
hwmon: (w83795) temp4_type has writable permission
2018-12-17 09:24:33 +01:00
wm831x-hwmon.c
…
wm8350-hwmon.c
…
xgene-hwmon.c
hwmon: (xgene) Minor clean up of ifdef and acpi_match_table reference
2017-11-01 06:14:52 -07:00