In the Linux kernel, the following vulnerability has been resolved:
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
Currently, Alpha's pci_mmap_resource() does not check
security_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap
PCI BARs.
The generic version has had this check since commit eb627e17727e ("PCI:
Lock down BAR access when the kernel is locked down") to prevent DMA
attacks when the kernel is locked down.
Add the same check to Alpha's pci_mmap_resource().
References 8
https://git.kernel.org/stable/c/257b55dc3d18d7ef01f62a8ff7317871f7597e28
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4de5ff924c0a8ef8166c1a68af9087826e1e8d61
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6e368485a1ac19fbde0a8b6a332d4545ae72a8ac
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/78a228f0aa0e9eba31955950c8a40a9945e2c8bb
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/85f966b1120874fe530edec50d28373ceb06ebcd
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/94defb18ac792fd16407d5a52ad0d3f5055c4b43
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c3234efe21d4198945492cf7dba6859476f0f6ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2b
416baaa9-dc9f-4396-8d5f-8c081fb06d67