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 <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Dec 18 13:29:00 CET 2017
From: Miaoqing Pan <miaoqing@xxxxxxxxxxxxxx>
Date: Wed, 27 Sep 2017 09:13:34 +0800
Subject: ath9k: fix tx99 potential info leak
From: Miaoqing Pan <miaoqing@xxxxxxxxxxxxxx>
[ 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.
Signed-off-by: Miaoqing Pan <miaoqing@xxxxxxxxxxxxxx>
Reviewed-by: Christoph Böhmwalder <christoph@xxxxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/tx99.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/net/wireless/ath/ath9k/tx99.c
+++ b/drivers/net/wireless/ath/ath9k/tx99.c
@@ -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 miaoqing@xxxxxxxxxxxxxx are
queue-4.14/ath9k-fix-tx99-potential-info-leak.patch