linux-kernel - [PATCH] usbip: usbip_detach: Fix memory, udev context and udev leak

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Message-Id: <20180529221303.27042-1-shuah@kernel.org>
Date:   Tue, 29 May 2018 16:13:03 -0600
From:   "Shuah Khan (Samsung OSG)" <shuah@...nel.org>
To:     shuah@...nel.org, valentina.manea.m@...il.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: [PATCH] usbip: usbip_detach: Fix memory, udev context and udev leak

detach_port() fails to call usbip_vhci_driver_close() from its error
path after usbip_vhci_detach_device() returns failure, leaking memory
allocated in usbip_vhci_driver_open() and holding udev_context and udev
references. Fix it to call usbip_vhci_driver_close().

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@...nel.org>
---
 tools/usb/usbip/src/usbip_detach.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/usb/usbip/src/usbip_detach.c b/tools/usb/usbip/src/usbip_detach.c
index 9db9d21bb2ec..6a8db858caa5 100644
--- a/tools/usb/usbip/src/usbip_detach.c
+++ b/tools/usb/usbip/src/usbip_detach.c
@@ -43,7 +43,7 @@ void usbip_detach_usage(void)
 
 static int detach_port(char *port)
 {
-	int ret;
+	int ret = 0;
 	uint8_t portnum;
 	char path[PATH_MAX+1];
 
@@ -73,9 +73,12 @@ static int detach_port(char *port)
 	}
 
 	ret = usbip_vhci_detach_device(portnum);
-	if (ret < 0)
-		return -1;
+	if (ret < 0) {
+		ret = -1;
+		goto call_driver_close;
+	}
 
+call_driver_close:
 	usbip_vhci_driver_close();
 
 	return ret;
-- 
2.14.1