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linux/drivers/iio/light
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Luca Ceresoli 7ca84f6a22 iio: light: opt3001: fix deadlock due to concurrent flag access 
commit f063a28002 upstream.

The threaded IRQ function in this driver is reading the flag twice: once to
lock a mutex and once to unlock it. Even though the code setting the flag
is designed to prevent it, there are subtle cases where the flag could be
true at the mutex_lock stage and false at the mutex_unlock stage. This
results in the mutex not being unlocked, resulting in a deadlock.

Fix it by making the opt3001_irq() code generally more robust, reading the
flag into a variable and using the variable value at both stages.

Fixes: 94a9b7b180 ("iio: light: add support for TI's opt3001 light sensor")
Cc: stable@vger.kernel.org
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patch.msgid.link/20250321-opt3001-irq-fix-v1-1-6c520d851562@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[Fixed conflict while applying on 6.12]
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-05-22 14:29:53 +02:00
..
acpi-als.c iio: Rename iio_trigger_poll_chained and add kernel-doc 2023-03-11 12:18:29 +00:00
adjd_s311.c iio: light: adjd_s311: make use of iio_for_each_active_channel() 2024-08-03 10:13:40 +01:00
adux1020.c iio: light: adux1020: make use of regmap_clear_bits(), regmap_set_bits() 2024-06-25 21:04:47 +01:00
al3010.c iio: light: al3010: Fix an error handling path in al3010_probe() 2024-12-05 14:02:35 +01:00
al3320a.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
apds9300.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
apds9306.c iio: light: apds9306: fix max_scale_nano values 2025-03-13 13:02:17 +01:00
apds9960.c iio: light: apds9960: Add proximity and gesture offset calibration 2024-08-10 11:17:35 +01:00
as73211.c iio: light: as73211: fix channel handling in only-color triggered buffer 2025-02-17 10:05:31 +01:00
bh1745.c iio: light: bh1745: fix information leak in triggered buffer 2025-01-17 13:40:56 +01:00
bh1750.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
bh1780.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
cm3232.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
cm3323.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
cm3605.c iio: light: cm3605: Convert to platform remove callback returning void 2023-09-23 15:06:55 +01:00
cm32181.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
cm36651.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
cros_ec_light_prox.c iio: cros: Register FIFO callback after sensor is registered 2022-07-18 18:29:13 +01:00
gp2ap002.c iio: light: gp2ap002: Constify struct regmap_bus 2024-07-29 20:31:10 +01:00
gp2ap020a00f.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
hid-sensor-als.c IIO: 1st set of new device support, features and cleanup for 6.9 2024-02-25 14:11:41 +01:00
hid-sensor-prox.c iio: light: hid-sensor-prox: Convert to platform remove callback returning void 2023-09-23 15:06:55 +01:00
iqs621-als.c iio: light: iqs621-als: make use of regmap_clear_bits() 2024-06-25 21:04:47 +01:00
isl29018.c iio: light: isl29018: make use of regmap_clear_bits() 2024-06-25 21:04:47 +01:00
isl29028.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
isl29125.c iio: light: isl29125: make use of iio_for_each_active_channel() 2024-08-03 10:13:40 +01:00
isl76682.c iio: light: isl76682: remove unreachable code 2023-12-11 19:16:35 +00:00
jsa1212.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
Kconfig iio: light: bu27008: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig 2024-10-06 16:29:32 +01:00
lm3533-als.c iio: light: lm3533-als: Convert to platform remove callback returning void 2023-09-23 15:06:55 +01:00
ltr390.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ltr501.c iio: light: ltr501: Add LTER0303 to the supported devices 2024-12-14 20:04:08 +01:00
ltrf216a.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
lv0104cs.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
Makefile iio: light: ROHM BH1745 colour sensor 2024-08-03 10:13:41 +01:00
max44000.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
max44009.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
noa1305.c iio: light: noa1305: Fix up integration time look up 2024-08-17 15:37:37 +01:00
opt3001.c iio: light: opt3001: fix deadlock due to concurrent flag access 2025-05-22 14:29:53 +02:00
opt4001.c iio: light: opt4001: Use i2c_get_match_data() 2023-09-12 10:42:03 +01:00
pa12203001.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
rohm-bu27008.c iio: bu27008: Add illuminance channel 2023-11-16 19:10:27 +00:00
rohm-bu27034.c iio: bu27034: Add a read only HARDWAREGAIN 2024-08-03 10:13:35 +01:00
rpr0521.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
si1133.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
si1145.c iio: light: si1145: use new '.masklength' accessors 2024-08-03 10:13:40 +01:00
st_uvis25.h iio:light:st_uvis25: Fix timestamp alignment and prevent data leak. 2020-12-03 19:40:27 +00:00
st_uvis25_core.c iio: light: st_uvis25_core: make use of regmap_clear_bits() 2024-06-25 21:04:47 +01:00
st_uvis25_i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
st_uvis25_spi.c iio: light: st_uvis25: Use EXPORT_NS_SIMPLE_DEV_PM_OPS() 2022-09-21 18:42:57 +01:00
stk3310.c iio: light: stk3310: add support for stk3013 2024-08-03 10:13:44 +01:00
tcs3414.c iio: light: tcs3414: make use of iio_for_each_active_channel() 2024-08-03 10:13:40 +01:00
tcs3472.c iio: light: tcs3472: make use of iio_for_each_active_channel() 2024-08-03 10:13:40 +01:00
tsl2563.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
tsl2583.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
tsl2591.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
tsl2772.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
tsl4531.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
us5182d.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
vcnl4000.c iio: light: vcnl4000: Set ps high definition for 4040/4200 2024-02-17 16:16:09 +00:00
vcnl4035.c iio: light: vcnl4035: fix information leak in triggered buffer 2025-01-17 13:40:56 +01:00
veml6030.c iio: light: veml6030: fix microlux value calculation 2024-10-24 18:30:03 +01:00
veml6040.c iio: light: driver for Vishay VEML6040 2024-06-13 19:19:25 +01:00
veml6070.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
veml6075.c iio: light: Add check for array bounds in veml6075_read_int_time_ms 2025-04-10 14:39:24 +02:00
vl6180.c iio: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-27 09:48:57 +01:00
zopt2201.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00