CVE-2024-42140 Information

Description

In the Linux kernel the following vulnerability has been resolved:

riscv: kexec: Avoid deadlock in kexec crash path

If the kexec crash code is called in the interrupt context the machine_kexec_mask_interrupts() function will trigger a deadlock while trying to acquire the irqdesc spinlock and then deactivate irqchip in irq_set_irqchip_state() function.

Unlike arm64 riscv only requires irq_eoi handler to complete EOI and keeping irq_set_irqchip_state() will only leave this possible deadlock without any use. So we simply remove it.

Reference

https://git.kernel.org/stable/c/bb80a7911218bbab2a69b5db7d2545643ab0073d https://git.kernel.org/stable/c/653deee48a4682ea17a05b96fb6842795ab5943c https://git.kernel.org/stable/c/7692c9b6baacdee378435f58f19baf0eb69e4155 https://git.kernel.org/stable/c/484dd545271d02d1571e1c6b62ea7df9dbe5e692 https://git.kernel.org/stable/c/c562ba719df570c986caf0941fea2449150bcbc4