CVE-2024-57949 Information

Description

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 ]

Reference

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