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[IA64] Avoid array overflow if there are too many cpus in SRAT table 

acpi_numa_init() has to parse the whole SRAT table, even if the
kernel wants to limit the number of cpus it will use (because the
ones it is going to use may be described by entries at the end of
the SRAT table).  Avoid overflowing the node_cpuid array.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Tony Luck 2011-01-07 09:11:55 -08:00
parent e7d282535c
commit 05f2f274c8
1 changed files with 6 additions and 0 deletions
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6
arch/ia64/kernel/acpi.c
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@ -477,6 +477,12 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
return;
if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
printk_once(KERN_WARNING
"node_cpuid[%d] is too small, may not be able to use all cpus\n",
ARRAY_SIZE(node_cpuid));
return;
}
pxm = get_processor_proximity_domain(pa);
/* record this node in proximity bitmap */