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linux/drivers/platform
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Denis Arefev 943fe13970 asus-laptop: Fix an uninitialized variable 
commit 6c683c6887 upstream.

The value returned by acpi_evaluate_integer() is not checked,
but the result is not always successful, so it is necessary to
add a check of the returned value.

If the result remains negative during three iterations of the loop,
then the uninitialized variable 'val' will be used in the clamp_val()
macro, so it must be initialized with the current value of the 'curr'
variable.

In this case, the algorithm should be less noisy.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: b23910c219 ("asus-laptop: Pegatron Lucid accelerometer")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Link: https://lore.kernel.org/r/20250403122603.18172-1-arefev@swemel.ru
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-04-25 10:43:52 +02:00
..
chrome platform/chrome: cros_ec_typec: fix missing fwnode reference decrement 2024-12-14 19:54:02 +01:00
goldfish platform: goldfish: pipe: Use platform_get_irq() to get the interrupt 2022-03-18 13:55:21 +01:00
loongarch platform/loongarch: laptop: Fix possible UAF and simplify generic_acpi_laptop_init() 2022-10-29 16:29:31 +08:00
mellanox platform/mellanox: nvsw-sn2201: Add check for platform_device_add_resources 2024-07-25 09:49:15 +02:00
mips platform: mips: cpu_hwmon: Disable driver on unsupported hardware 2024-08-03 08:49:43 +02:00
olpc platform/olpc: Fix uninitialized data in debugfs write 2022-07-28 20:40:15 +02:00
surface platform/surface: aggregator_registry: Add support for Surface Laptop Go 3 2024-09-18 19:23:03 +02:00
x86 asus-laptop: Fix an uninitialized variable 2025-04-25 10:43:52 +02:00
Kconfig LoongArch: Add ACPI-based generic laptop driver 2022-10-12 16:36:20 +08:00
Makefile LoongArch: Add ACPI-based generic laptop driver 2022-10-12 16:36:20 +08:00