From: Dan Carpenter <dan.carpenter@oracle.com>
To: Juergen Stuber <starblue@users.sourceforge.net>,
Johan Hovold <johan@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
legousb-devel@lists.sourceforge.net, linux-usb@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH] USB: legousbtower: fix a signedness bug in tower_probe()
Date: Fri, 11 Oct 2019 16:35:25 +0300 [thread overview]
Message-ID: <20191011133525.GB22905@mwanda> (raw)
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>
---
drivers/usb/misc/legousbtower.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 9d4c52a7ebe0..835908fe1e65 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -881,7 +881,7 @@ 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 < 0 || result < sizeof(*get_version_reply)) {
if (result >= 0)
result = -EIO;
dev_err(idev, "get version request failed: %d\n", result);
--
2.20.1
next reply other threads:[~2019-10-11 13:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 13:35 Dan Carpenter [this message]
2019-10-11 13:51 ` [PATCH] USB: legousbtower: fix a signedness bug in tower_probe() walter harms
2019-10-11 13:58 ` Dan Carpenter
2019-10-11 14:08 ` Johan Hovold
2019-10-11 14:11 ` [PATCH v2] " Dan Carpenter
2019-10-11 14:23 ` Johan Hovold
2019-10-11 14:04 ` [PATCH] " Johan Hovold
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