CVE-2024-43824

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init() Instead of getting the epc_features from pci_epc_get_features() API, use the cached pci_epf_test::epc_features value to avoid the NULL check. Since the NULL check is already performed in pci_epf_test_bind(), having one more check in pci_epf_test_core_init() is redundant and it is not possible to hit the NULL pointer dereference. Also with commit a01e7214bef9 ("PCI: endpoint: Remove "core_init_notifier" flag"), 'epc_features' got dereferenced without the NULL check, leading to the following false positive Smatch warning: drivers/pci/endpoint/functions/pci-epf-test.c:784 pci_epf_test_core_init() error: we previously assumed 'epc_features' could be null (see line 747) Thus, remove the redundant NULL check and also use the epc_features:: {msix_capable/msi_capable} flags directly to avoid local variables. [kwilczynski: commit log]

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8a ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/5a5095a8bd1bd349cce1c879e5e44407a34dda8aPatch
• https://git.kernel.org/stable/c/af4ad016abb1632ff7ee598a6037952b495e5b80Patch
• https://git.kernel.org/stable/c/5c71be3476088ab490d48a468b54d791f91241b8
• https://git.kernel.org/stable/c/97cee643a825808711cc78475fd61a30824b7a0f