From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 8 Jan 2014 21:22:05 +0000 (+0100)
Subject: mac80211: fix agg_status debugfs file write
X-Git-Tag: v3.15-rc1~113^2~18^2^2~47^2~81
X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=c4d2ffac330fd013944654f11cdfc06ff5ca9bf4;p=cascardo%2Flinux.git

mac80211: fix agg_status debugfs file write

Initialize the buffer to all zeroes, otherwise the stack
data might be interpreted as the TID, which is likely to
fail completely.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 80194b557a0c..2ecb4deddb5d 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -195,7 +195,7 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 				    size_t count, loff_t *ppos)
 {
-	char _buf[12], *buf = _buf;
+	char _buf[12] = {}, *buf = _buf;
 	struct sta_info *sta = file->private_data;
 	bool start, tx;
 	unsigned long tid;