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| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-05-29 14:34:39 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2024-06-28 18:38:30 +0100 |
| commit | 2488444274c70038eb6b686cba5f1ce48ebb9cdd (patch) | |
| tree | bf492dcc7e6d47487b4bb6f29e14a9380d6af0ca /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | arm64: acpi: Move get_cpu_for_acpi_id() to a header (diff) | |
| download | linux-2488444274c70038eb6b686cba5f1ce48ebb9cdd.tar.gz linux-2488444274c70038eb6b686cba5f1ce48ebb9cdd.zip | |
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>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions