CVE-2026-64230

In the Linux kernel, the following vulnerability has been resolved:

regulator: tps65219: fix irq_data.rdev not being assigned

Commit 64a6b577490c ("regulator: tps65219: Remove debugging helper

function") removed the tps65219_get_rdev_by_name() helper along with

the irq_data.rdev assignment that depended on it. This left

irq_data.rdev uninitialized for all IRQs, causing undefined behavior

when regulator_notifier_call_chain() is called from the IRQ handler:

Internal error: Oops: 0000000096000004

pc : regulator_notifier_call_chain

lr : tps65219_regulator_irq_handler

Call trace:

regulator_notifier_call_chain

tps65219_regulator_irq_handler

handle_nested_irq

regmap_irq_thread

irq_thread_fn

irq_thread

kthread

ret_from_fork

Instead of restoring a dedicated lookup array, restructure the probe

function to combine regulator registration with IRQ registration in

the same loop. This way the rdev returned by devm_regulator_register()

is naturally available for assigning to irq_data.rdev without any

auxiliary data structure.

Non-regulator IRQs (SENSOR, TIMEOUT) that don't correspond to any

registered regulator are registered with rdev=NULL, and the IRQ handler

is protected with a NULL check to avoid crashing.