From: Aditya Pakki <pakki001@umn.edu>
To: pakki001@umn.edu
Cc: kjlu@umn.edu, Richard Leitner <richard.leitner@skidata.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3] usb: usb251xb: fix to avoid potential NULL pointer dereference
Date: Wed, 20 Mar 2019 10:27:11 -0500 [thread overview]
Message-ID: <20190320152711.28749-1-pakki001@umn.edu> (raw)
of_match_device in usb251xb_probe can fail and returns a NULL pointer.
The patch avoids a potential NULL pointer dereference in this scenario.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Richard Leitner <richard.leitner@skidata.com>
---
v2: Fix version changes below sign off
v1: avoid return in case of error, per Richard's suggestion.
---
drivers/usb/misc/usb251xb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 4d72b7d1d383..bbfdb7447d6f 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -612,7 +612,7 @@ static int usb251xb_probe(struct usb251xb *hub)
dev);
int err;
- if (np) {
+ if (np && of_id) {
err = usb251xb_get_ofdata(hub,
(struct usb251xb_data *)of_id->data);
if (err) {
--
2.17.1
reply other threads:[~2019-03-20 15:27 UTC|newest]
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