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

PCI: mediatek: Fix IRQ domain leak when port fails to enable

When mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port
from pcie->ports and frees the port structure. However, the IRQ domains set
up earlier by mtk_pcie_init_irq_domain() are never freed.

Fix this by refactoring mtk_pcie_irq_teardown() into a per-port helper,
mtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when
mtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in
the probe error path (during resume, child devices may have active MSI
mappings and the NOIRQ context prohibits sleeping locks),
mtk_pcie_enable_port() is changed to return an error code so callers can
distinguish the two paths and act accordingly.

This issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC
support series.

https://git.kernel.org/stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12

https://git.kernel.org/stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225

https://git.kernel.org/stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986

https://git.kernel.org/stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e

https://git.kernel.org/stable/c/e23da72ef202654a7d5269885c4fa39a8404db76

https://git.kernel.org/stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035

https://git.kernel.org/stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7

https://git.kernel.org/stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0

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