Vulnerability CVE-2022-48724
Published: 2024-06-20

Description:
In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping()

After commit e3beca48a45b ("irqdomain/treewide: Keep firmware node
unconditionally allocated"). For tear down scenario, fn is only freed
after fail to allocate ir_domain, though it also should be freed in case
dmar_enable_qi returns error.

Besides free fn, irq_domain and ir_msi_domain need to be removed as well
if intel_setup_irq_remapping fails to enable queued invalidation.

Improve the rewinding path by add out_free_ir_domain and out_free_fwnode
lables per Baolu's suggestion.

 References:
https://git.kernel.org/stable/c/a0c685ba99961b1dd894b2e470e692a539770f6d
https://git.kernel.org/stable/c/a31cb1f0fb6caf46ffe88c41252b6b7a4ee062d9
https://git.kernel.org/stable/c/5c43d46daa0d2928234dd2792ebebc35d29ee2d1
https://git.kernel.org/stable/c/9d9995b0371e4e8c18d4f955479e5d47efe7b2d4
https://git.kernel.org/stable/c/336d096b62bdc673e852b6b80d5072d7888ce85d
https://git.kernel.org/stable/c/b62eceb5f8f08815fe3f945fc55bbf997c344ecd
https://git.kernel.org/stable/c/99e675d473eb8cf2deac1376a0f840222fc1adcf
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