From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Olav Kongas <ok@artecdesign.ee>,
        Sasha Levin <sashal@kernel.org>, linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 6.2 36/64] USB: isp116x: fix memory leak with using debugfs_lookup()
Date:   Fri,  3 Mar 2023 16:40:38 -0500
Message-Id: <20230303214106.1446460-36-sashal@kernel.org>
In-Reply-To: <20230303214106.1446460-1-sashal@kernel.org>
References: <20230303214106.1446460-1-sashal@kernel.org>
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit a95f62d5813facbec20ec087472eb313ee5fa8af ]

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

Cc: Olav Kongas <ok@artecdesign.ee>
Link: https://lore.kernel.org/r/20230202153235.2412790-6-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/host/isp116x-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 4f564d71bb0bc..49ae01487af4d 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1205,7 +1205,7 @@ static void create_debug_file(struct isp116x *isp116x)
 
 static void remove_debug_file(struct isp116x *isp116x)
 {
-	debugfs_remove(debugfs_lookup(hcd_name, usb_debug_root));
+	debugfs_lookup_and_remove(hcd_name, usb_debug_root);
 }
 
 #else
-- 
2.39.2