linux-kernel - [PATCH 4.19 31/49] xtensa: Fix refcount leak bug in time.c

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Message-Id: <20220630133234.808305251@linuxfoundation.org>
Date:   Thu, 30 Jun 2022 15:46:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liang He <windhl@....com>,
        Max Filippov <jcmvbkbc@...il.com>
Subject: [PATCH 4.19 31/49] xtensa: Fix refcount leak bug in time.c

From: Liang He <windhl@....com>

commit a0117dc956429f2ede17b323046e1968d1849150 upstream.

In calibrate_ccount(), of_find_compatible_node() will return a node
pointer with refcount incremented. We should use of_node_put() when
it is not used anymore.

Cc: stable@...r.kernel.org
Signed-off-by: Liang He <windhl@....com>
Message-Id: <20220617124432.4049006-1-windhl@....com>
Signed-off-by: Max Filippov <jcmvbkbc@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/xtensa/kernel/time.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/xtensa/kernel/time.c
+++ b/arch/xtensa/kernel/time.c
@@ -146,6 +146,7 @@ static void __init calibrate_ccount(void
 	cpu = of_find_compatible_node(NULL, NULL, "cdns,xtensa-cpu");
 	if (cpu) {
 		clk = of_clk_get(cpu, 0);
+		of_node_put(cpu);
 		if (!IS_ERR(clk)) {
 			ccount_freq = clk_get_rate(clk);
 			return;