PCI: kirin: Fix buffer overflow in kirin_pcie_parse_port()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: PCI: kirin: Fix buffer overflow in kirin_pcie_parse_port() Within kirin_pcie_parse_port(), the pcie->num_slots is compared to pcie->gpio_id_reset size (MAX_PCI_SLOTS) which is correct and would lead to an overflow. Thus, fix condition to pcie->num_slots + 1 >= MAX_PCI_SLOTS and move pcie->num_slots increment below the if-statement to avoid out-of-bounds array access. Found by Linux Verification Center (linuxtesting.org) with SVACE. [kwilczynski: commit log]

References

• https://git.kernel.org/stable/c/a5f795f9412854df28e66679c5e6b68b0b79c229
• https://git.kernel.org/stable/c/95248d7497bcbfe7deed4805469c6ff6ddd7f9d1
• https://git.kernel.org/stable/c/6dcc5b49d6607a741a14122bf3105f3ac50d259e
• https://git.kernel.org/stable/c/aeb0335971806e15ac91e838ca471936c8e7efd5
• https://git.kernel.org/stable/c/c500a86693a126c9393e602741e348f80f1b0fc5