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 dan.carpenter@oracle.com 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.

Fixes: c6dc001f2add ("staging: r8712u: Merging Realtek's latest (v2.6.6). Various fixes.") Cc: stable stable@vger.kernel.org Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Link: https://lore.kernel.org/r/YDYSR+1rj26NRhvb@mwanda Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/rtl8712/rtl871x_ioctl_linux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c index 81de5a9e6b67..60dd798a6e51 100644 --- a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c +++ b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c @@ -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);