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

irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove

The driver allocates domain generic chips using
irq_alloc_domain_generic_chips() during probe and sets up chained
handlers using irq_set_chained_handler_and_data(). However, on driver
removal, the generic chips are not freed and the chained handlers are
not removed.

The generic chips remain on the global gc_list and may later be accessed by
generic interrupt chip suspend, resume, or shutdown callbacks after the
driver has been removed, potentially resulting in a use-after-free and
kernel crash.

The chained handlers that were installed in probe for peripheral and
syswake interrupts are also left dangling, which can lead to spurious
interrupts accessing freed memory.

Fix these issues by:

  - Setting IRQ_DOMAIN_FLAG_DESTROY_GC flag in domain->flags, so the
    core code automatically removes generic chips when irq_domain_remove()
    is called

  - Clearing all chained handlers with NULL in pdc_intc_remove()

https://git.kernel.org/stable/c/0405a65e4ebd9eac13a765f9f02ac05851ca5421

https://git.kernel.org/stable/c/37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057

https://git.kernel.org/stable/c/41826e5297e67cd96a0a46fde06a5069a8ce436a

https://git.kernel.org/stable/c/44567537a2623dcd2b4018a7f043cf8069579e5d

https://git.kernel.org/stable/c/8176773dfceae7978b01c20b233693e072053700

https://git.kernel.org/stable/c/83d7ec14b0938ad8cae008058fd6f912f4a9a312

https://git.kernel.org/stable/c/b3a3831b2eb884641906fc5e46207b205b6aea13

https://git.kernel.org/stable/c/c2c7733101bb8c0b29ac9ee41073eaf602821a59

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