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

irqchip/gic-v3-its: Don't enable interrupts in its_irq_set_vcpu_affinity()

The following call-chain leads to enabling interrupts in a nested interrupt
disabled section:

irq_set_vcpu_affinity()
  irq_get_desc_lock()
     raw_spin_lock_irqsave()   <--- Disable interrupts
  its_irq_set_vcpu_affinity()
     guard(raw_spinlock_irq)   <--- Enables interrupts when leaving the guard()
  irq_put_desc_unlock()        <--- Warns because interrupts are enabled

This was broken in commit b97e8a2f7130, which replaced the original
raw_spin_[un]lock() pair with guard(raw_spinlock_irq).

Fix the issue by using guard(raw_spinlock).

[ tglx: Massaged change log ]

https://git.kernel.org/stable/c/35cb2c6ce7da545f3b5cb1e6473ad7c3a6f08310

https://git.kernel.org/stable/c/6c84ff2e788fce0099ee3e71a3ed258b1ca1a223

https://git.kernel.org/stable/c/93955a7788121ab5a0f7f27e988b2ed1135a4866

https://git.kernel.org/stable/c/d7b0e89610dd45ac6cf0d6f99bfa9ccc787db344