Merge: Fix refcount leak in powerpc xics

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6504

Description: Fix refcount leak in powerpc xics

JIRA: https://issues.redhat.com/browse/RHEL-80861

CVE: CVE-2022-49432

Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=66857305

Tested: Verified Brew build test kernel RPMs

Signed-off-by: Mamatha Inamdar <[email protected]>

commit 5dd9e27
Author: Lv Ruyi <[email protected]>
Date:   Sat Apr 2 01:34:19 2022 +0000

    powerpc/xics: fix refcount leak in icp_opal_init()

    The of_find_compatible_node() function returns a node pointer with
    refcount incremented, use of_node_put() on it when done.

    Reported-by: Zeal Robot <[email protected]>
    Signed-off-by: Lv Ruyi <[email protected]>
    Signed-off-by: Michael Ellerman <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]

Signed-off-by: Mamatha Inamdar <[email protected]>

Approved-by: Steve Best <[email protected]>
Approved-by: Tony Camuso <[email protected]>
Approved-by: CKI KWF Bot <[email protected]>

Merged-by: Augusto Caringi <[email protected]>

Author: caringi

arch/powerpc/sysdev/xics/icp-opal.c

@@ -196,6 +196,7 @@ int icp_opal_init(void)
 
 	printk("XICS: Using OPAL ICP fallbacks\n");
 
+	of_node_put(np);
 	return 0;
 }