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 tps65219getrdevbyname() helper along with the irqdata.rdev assignment that depended on it. This left irqdata.rdev uninitialized for all IRQs, causing undefined behavior when regulatornotifiercall_chain() is called from the IRQ handler:

Internal error: Oops: 0000000096000004 pc : regulatornotifiercallchain lr : tps65219regulatorirqhandler Call trace: regulatornotifiercallchain tps65219regulatorirqhandler handlenestedirq regmapirqthread irqthreadfn irqthread kthread retfrom_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 devmregulatorregister() 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.