Patch "ath9k: fix tx99 potential info leak" has been added to the 4.14-stable tree

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

ath9k: fix tx99 potential info leak

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ath9k-fix-tx99-potential-info-leak.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Miaoqing Pan <[email protected]>
Date: Wed, 27 Sep 2017 09:13:34 +0800
Subject: ath9k: fix tx99 potential info leak

From: Miaoqing Pan <[email protected]>

[ Upstream commit ee0a47186e2fa9aa1c56cadcea470ca0ba8c8692 ]

When the user sets count to zero the string buffer would remain completely uninitialized which causes the kernel to parse its own stack data, potentially leading to an info leak. In addition to that, the string might be not terminated properly when the user data does not contain a 0-terminator.

---
 drivers/net/wireless/ath/ath9k/tx99.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -179,6 +179,9 @@ static ssize_t write_file_tx99(struct fi
 	ssize_t len;
 	int r;
 
+	if (count < 1)
+		return -EINVAL;
+
 	if (sc->cur_chan->nvifs > 1)
 		return -EOPNOTSUPP;
 

@@ -186,6 +189,8 @@ static ssize_t write_file_tx99(struct fi
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 
+	buf[len] = '\0';
+
 	if (strtobool(buf, &start))
 		return -EINVAL;
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/ath9k-fix-tx99-potential-info-leak.patch