PCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init()

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]

Timeline

1. Aug 17, 2024, 9:21 AM UTCCVE published
2. Sep 10, 2024, 4:08 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 21, 2026, 12:35 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 5e50ee27d4a52a817ab152128c48690ec7c5cdf1 · fixed in 97cee643a825808711cc78475fd61a30824b7a0f; From 5e50ee27d4a52a817ab152128c48690ec7c5cdf1 · fixed in af4ad016abb1632ff7ee598a6037952b495e5b80; From 5e50ee27d4a52a817ab152128c48690ec7c5cdf1 · fixed in 5a5095a8bd1bd349cce1c879e5e44407a34dda8a

• Linux Linux

  5.7

• KernelLinux

  From 5.7.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.10.3

References 3