CVE-2024-26810

In the Linux kernel, the following vulnerability has been resolved:
vfio/pci: Lock external INTx masking ops Mask operations through config
space changes to DisINTx may race INTx configuration changes via ioctl.
Create wrappers that add locking for paths outside of the core interrupt
code. In particular, irq_type is updated holding igate, therefore testing
is_intx() requires holding igate. For example clearing DisINTx from config
space can otherwise race changes of the interrupt configuration. This
aligns interfaces which may trigger the INTx eventfd into two camps, one
side serialized by igate and the other only enabled while INTx is
configured. A subsequent patch introduces synchronization for the latter
flows.