linux-kernel - [PATCH] powerpc: sysdev: Fix refcount leak bug in fsl

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Date:   Sat, 18 Jun 2022 11:32:07 +0800
From:   Liang He <windhl@....com>
To:     mpe@...erman.id.au, paulus@...ba.org, christophe.leroy@...roup.eu,
        nick.child@....com, pali@...nel.org, npiggin@...il.com
Cc:     windhl@....com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: sysdev: Fix refcount leak bug in fsl_pci.c

In is_kdump(), we need a of_node_put() to dec the refcount which is
incremented by of_find_node_by_type().

Signed-off-by: Liang He <windhl@....com>
---
 arch/powerpc/sysdev/fsl_pci.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 1011cfea2e32..4c986c955951 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -180,6 +180,7 @@ static int setup_one_atmu(struct ccsr_pci __iomem *pci,
 static bool is_kdump(void)
 {
 	struct device_node *node;
+	bool ret;
 
 	node = of_find_node_by_type(NULL, "memory");
 	if (!node) {
@@ -187,7 +188,10 @@ static bool is_kdump(void)
 		return false;
 	}
 
-	return of_property_read_bool(node, "linux,usable-memory");
+	ret = of_property_read_bool(node, "linux,usable-memory");
+	of_node_put(node);
+
+	return ret;
 }
 
 /* atmu setup for fsl pci/pcie controller */
-- 
2.25.1