From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 11 Oct 2019 14:11:15 +0000 (+0300)
Subject: USB: legousbtower: fix a signedness bug in tower_probe()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=fd47a417e75e2506eb3672ae569b1c87e3774155;p=uclinux-h8%2Flinux.git

USB: legousbtower: fix a signedness bug in tower_probe()

The problem is that sizeof() is unsigned long so negative error codes
are type promoted to high positive values and the condition becomes
false.

Fixes: 1d427be4a39d ("USB: legousbtower: fix slab info leak at probe")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191011141115.GA4521@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 62dab2441ec4..23061f1526b4 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -878,7 +878,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device
 				  get_version_reply,
 				  sizeof(*get_version_reply),
 				  1000);
-	if (result < sizeof(*get_version_reply)) {
+	if (result != sizeof(*get_version_reply)) {
 		if (result >= 0)
 			result = -EIO;
 		dev_err(idev, "get version request failed: %d\n", result);