Jonathan Cameron 2488444274 arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry ... In a review discussion of the changes to support vCPU hotplug where a check was added on the GICC being enabled if was online, it was noted that there is need to map back to the cpu and use that to index into a cpumask. As such, a valid ID is needed. If an MPIDR check fails in acpi_map_gic_cpu_interface() it is possible for the entry in cpu_madt_gicc[cpu] == NULL. This function would then cause a NULL pointer dereference. Whilst a path to trigger this has not been established, harden this caller against the possibility. Reviewed-by: Gavin Shan <gshan@redhat.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/20240529133446.28446-13-Jonathan.Cameron@huawei.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2024-06-28 18:38:30 +01:00
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asm	arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry	2024-06-28 18:38:30 +01:00
uapi/asm	S390:	2024-03-15 13:03:13 -07:00