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ACPI: CPPC: Fix reference count leak in acpi_cppc_processor_probe() 

commit 4d8be4bc94 upstream.

kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object. Previous
commit "b8eb718348b8" fixed a similar problem.

Fixes: 158c998ea4 ("ACPI / CPPC: add sysfs support to compute delivered performance")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Qiushi Wu 2020-05-27 17:35:51 -05:00 committed by Greg Kroah-Hartman
parent e4cc99efbe
commit 040b4dcc12
1 changed files with 1 additions and 0 deletions
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drivers/acpi/cppc_acpi.c
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@ -865,6 +865,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
"acpi_cppc");
if (ret) {
per_cpu(cpc_desc_ptr, pr->id) = NULL;
kobject_put(&cpc_ptr->kobj);
goto out_free;
}