Patch "powerpc/xive: Fix refcount leak in xive_get_max_prio" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    powerpc/xive: Fix refcount leak in xive_get_max_prio

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-xive-fix-refcount-leak-in-xive_get_max_prio.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1b0d8005f649e7e0bd3b31749b243b8c147555f3
Author: Miaoqian Lin <linmq006@xxxxxxxxx>
Date:   Sun Jun 5 09:32:23 2022 +0400

    powerpc/xive: Fix refcount leak in xive_get_max_prio
    
    [ Upstream commit 255b650cbec6849443ce2e0cdd187fd5e61c218c ]
    
    of_find_node_by_path() returns a node pointer with
    refcount incremented, we should use of_node_put() on it when done.
    Add missing of_node_put() to avoid refcount leak.
    
    Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
    Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
    Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220605053225.56125-1-linmq006@xxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c
index b57eeaff7bb3..38e8b9896174 100644
--- a/arch/powerpc/sysdev/xive/spapr.c
+++ b/arch/powerpc/sysdev/xive/spapr.c
@@ -710,6 +710,7 @@ static bool xive_get_max_prio(u8 *max_prio)
 	}
 
 	reg = of_get_property(rootdn, "ibm,plat-res-int-priorities", &len);
+	of_node_put(rootdn);
 	if (!reg) {
 		pr_err("Failed to read 'ibm,plat-res-int-priorities' property\n");
 		return false;