{bp-19324} drivers: pci: Fix EPC MSI IRQ map validation#19341
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pci_epc_map_msi_irq() used && when checking the EPC pointer and map_msi_irq callback. If epc is NULL, the right-hand side dereferences it; if the callback is NULL on a valid EPC, the guard does not reject it before the call. Match the surrounding EPC wrappers by rejecting a NULL EPC, an out-of-range function number, or a missing map_msi_irq callback before taking the lock and invoking the operation. Generated-by: OpenAI Codex Signed-off-by: Old-Ding <35417409+Old-Ding@users.noreply.github.com>
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Jul 6, 2026
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Summary
pci_epc_map_msi_irq() used && when checking the EPC pointer and map_msi_irq callback. If epc is NULL, the right-hand side dereferences it; if the callback is NULL on a valid EPC, the guard does not reject it before the call.
Match the surrounding EPC wrappers by rejecting a NULL EPC, an out-of-range function number, or a missing map_msi_irq callback before taking the lock and invoking the operation.
Generated-by: OpenAI Codex
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