linux-kernel - [PATCH 4.14 214/229] usb: host: ohci-ppc-of: Fix refcount leak bug

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Message-Id: <20220823080101.279637578@linuxfoundation.org>
Date:   Tue, 23 Aug 2022 10:26:15 +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, Alan Stern <stern@...land.harvard.edu>,
        Liang He <windhl@....com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 214/229] usb: host: ohci-ppc-of: Fix refcount leak bug

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

[ Upstream commit 40a959d7042bb7711e404ad2318b30e9f92c6b9b ]

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

Acked-by: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: Liang He <windhl@....com>
Link: https://lore.kernel.org/r/20220617034637.4003115-1-windhl@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/host/ohci-ppc-of.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 4f87a5c61b08..d22a70363fbf 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -168,6 +168,7 @@ static int ohci_hcd_ppc_of_probe(struct platform_device *op)
 				release_mem_region(res.start, 0x4);
 		} else
 			pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
+		of_node_put(np);
 	}
 
 	irq_dispose_mapping(irq);
-- 
2.35.1