Bug 2320230 (CVE-2024-47751)

Summary: CVE-2024-47751 kernel: PCI: kirin: Fix buffer overflow in kirin_pcie_parse_port()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2320392    
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Description OSIDB Bzimport 2024-10-21 13:04:00 UTC 
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]
Comment 1 Robb Gatica 2024-10-21 16:01:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102113-CVE-2024-47751-7a96@gregkh/T