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PowerCap: Fix an error code in powercap_register_zone()
[ Upstream commit216c4e9db4
] In the current code we accidentally return the successful result from idr_alloc() instead of a negative error pointer. The caller is looking for an error pointer and so it treats the returned value as a valid pointer. This one might be a bit serious because if it lets people get around the kernel's protection for remapping NULL. I'm not sure. Fixes:75d2364ea0
(PowerCap: Add class driver) Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -538,6 +538,7 @@ struct powercap_zone *powercap_register_zone(
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power_zone->id = result;
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idr_init(&power_zone->idr);
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result = -ENOMEM;
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power_zone->name = kstrdup(name, GFP_KERNEL);
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if (!power_zone->name)
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goto err_name_alloc;
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