patch "staging: rtl8712: unterminated string leads to read overflow" added to staging-linus

This is a note to let you know that I've just added the patch titled

staging: rtl8712: unterminated string leads to read overflow

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 3c0992038070465b5362fd401e41d3f85a2512a2 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <[email protected]>
Date: Wed, 24 Feb 2021 11:45:59 +0300
Subject: staging: rtl8712: unterminated string leads to read overflow

The memdup_user() function does not necessarily return a NUL terminated string so this can lead to a read overflow. Switch from memdup_user() to strndup_user() to fix this bug.

---
 drivers/staging/rtl8712/rtl871x_ioctl_linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 81de5a9e6b67..60dd798a6e51 100644
@@ -924,7 +924,7 @@ static int r871x_wx_set_priv(struct net_device *dev,
 	struct iw_point *dwrq = (struct iw_point *)awrq;
 
 	len = dwrq->length;
-	ext = memdup_user(dwrq->pointer, len);
+	ext = strndup_user(dwrq->pointer, len);
 	if (IS_ERR(ext))
 		return PTR_ERR(ext);
 

2.30.1