[Xen-devel] [PATCH] acpi: Make sure valid CPU is passed to do_pm_op()

[Boris Ostrovsky <boris.ostrovsky@xxxxxxx>]

# HG changeset patch
# User Boris Ostrovsky <boris.ostrovsky@xxxxxxx>
# Date 1344962129 -7200
# Node ID 4ebf248d3aa1423da340d6900dd5f21072e519b3
# Parent  33d596f46521ea852e90cf6dbdbf3680d104134c
acpi: Make sure valid CPU is passed to do_pm_op()

Passing invalid CPU value to do_pm_op() will cause assertion
in cpu_online().

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxx>

diff -r 33d596f46521 -r 4ebf248d3aa1 xen/drivers/acpi/pmstat.c
--- a/xen/drivers/acpi/pmstat.c Mon Aug 13 18:09:33 2012 +0100
+++ b/xen/drivers/acpi/pmstat.c Tue Aug 14 18:35:29 2012 +0200
@@ -419,7 +419,7 @@ int do_pm_op(struct xen_sysctl_pm_op *op
     int ret = 0;
     const struct processor_pminfo *pmpt;
 
-    if ( !op || !cpu_online(op->cpuid) )
+    if ( !op || op->cpuid >= nr_cpu_ids || !cpu_online(op->cpuid) )
         return -EINVAL;
     pmpt = processor_pminfo[op->cpuid];
 


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