From: Shuah Khan <shuahkh@osg.samsung.com>
Date: Fri, 15 Dec 2017 17:50:09 +0000 (-0700)
Subject: usbip: prevent leaking socket pointer address in messages
X-Git-Tag: v3.2.100~81
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=10f1f61202688423e5e70f78f72c0af2b30ea343;p=thirdparty%2Fkernel%2Fstable.git

usbip: prevent leaking socket pointer address in messages

commit 90120d15f4c397272aaf41077960a157fc4212bf upstream.

usbip driver is leaking socket pointer address in messages. Remove
the messages that aren't useful and print sockfd in the ones that
are useful for debugging.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/drivers/staging/usbip/stub_dev.c b/drivers/staging/usbip/stub_dev.c
index 55c0b510889ce..d98821a82612a 100644
--- a/drivers/staging/usbip/stub_dev.c
+++ b/drivers/staging/usbip/stub_dev.c
@@ -186,8 +186,7 @@ static void stub_shutdown_connection(struct usbip_device *ud)
 	 * step 1?
 	 */
 	if (ud->tcp_socket) {
-		dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n",
-			ud->tcp_socket);
+		dev_dbg(&sdev->udev->dev, "shutdown sockfd %d\n", ud->sockfd);
 		kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
 	}
 
diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c
index e5cbc34ef3856..783052cabadbb 100644
--- a/drivers/staging/usbip/usbip_common.c
+++ b/drivers/staging/usbip/usbip_common.c
@@ -346,13 +346,10 @@ int usbip_recv(struct socket *sock, void *buf, int size)
 	char *bp = buf;
 	int osize = size;
 
-	usbip_dbg_xmit("enter\n");
-
-	if (!sock || !buf || !size) {
-		pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf,
-		       size);
+	if (!sock || !buf || !size)
 		return -EINVAL;
-	}
+
+	usbip_dbg_xmit("enter\n");
 
 	do {
 		sock->sk->sk_allocation = GFP_NOIO;
@@ -366,11 +363,8 @@ int usbip_recv(struct socket *sock, void *buf, int size)
 		msg.msg_flags      = MSG_NOSIGNAL;
 
 		result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL);
-		if (result <= 0) {
-			pr_debug("receive sock %p buf %p size %u ret %d total %d\n",
-				 sock, buf, size, result, total);
+		if (result <= 0)
 			goto err;
-		}
 
 		size -= result;
 		buf += result;
diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c
index c75625089a1e4..40172b95ab8f4 100644
--- a/drivers/staging/usbip/vhci_hcd.c
+++ b/drivers/staging/usbip/vhci_hcd.c
@@ -811,7 +811,7 @@ static void vhci_shutdown_connection(struct usbip_device *ud)
 
 	/* need this? see stub_dev.c */
 	if (ud->tcp_socket) {
-		pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
+		pr_debug("shutdown tcp_socket %d\n", ud->sockfd);
 		kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
 	}