CVE-2024-27079

In the Linux kernel, the following vulnerability has been resolved:
iommu/vt-d: Fix NULL domain on device release In the kdump kernel, the
IOMMU operates in deferred_attach mode. In this mode, info->domain may not
yet be assigned by the time the release_device function is called. It leads
to the following crash in the crash kernel: BUG: kernel NULL pointer
dereference, address: 000000000000003c … RIP:
0010:do_raw_spin_lock+0xa/0xa0 … _raw_spin_lock_irqsave+0x1b/0x30
intel_iommu_release_device+0x96/0x170 iommu_deinit_device+0x39/0xf0
__iommu_group_remove_device+0xa0/0xd0 iommu_bus_notifier+0x55/0xb0
notifier_call_chain+0x5a/0xd0 blocking_notifier_call_chain+0x41/0x60
bus_notify+0x34/0x50 device_del+0x269/0x3d0
pci_remove_bus_device+0x77/0x100 p2sb_bar+0xae/0x1d0 …
i801_probe+0x423/0x740 Use the release_domain mechanism to fix it. The
scalable mode context entry which is not part of release domain should be
cleared in release_device().