xen, cpu_hotplug: Prevent an out of bounds access
The "cpu" variable comes from the sscanf() so Smatch marks it as
untrusted data. We can't pass a higher value than "nr_cpu_ids" to
cpu_possible() or it results in an out of bounds access.
Fixes: d68d82afd4
("xen: implement CPU hotplugging")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
parent
b1ddd406cd
commit
201676095d
|
@ -54,7 +54,7 @@ static int vcpu_online(unsigned int cpu)
|
|||
}
|
||||
static void vcpu_hotplug(unsigned int cpu)
|
||||
{
|
||||
if (!cpu_possible(cpu))
|
||||
if (cpu >= nr_cpu_ids || !cpu_possible(cpu))
|
||||
return;
|
||||
|
||||
switch (vcpu_online(cpu)) {
|
||||
|
|
Loading…
Reference in a new issue