From: Hao Chen <flank3rsky@gmail.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Hao Chen <flank3rsky@gmail.com>
Subject: [PATCH] nl80211: Check for the required netlink attribute presence
Date: Wed, 3 Jan 2018 11:00:31 +0800 [thread overview]
Message-ID: <1514948431-20893-1-git-send-email-flank3rsky@gmail.com> (raw)
nl80211_nan_add_func() does not check if the required attribute
NL80211_NAN_FUNC_FOLLOW_UP_DEST is present when processing
NL80211_CMD_ADD_NAN_FUNCTION request. This request can be issued
by users with CAP_NET_ADMIN privilege and may result in NULL dereference
and a system crash. Add a check for the required attribute presence.
Signed-off-by: Hao Chen <flank3rsky@gmail.com>
---
net/wireless/nl80211.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 213d0c4..2b3dbcd 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -11361,7 +11361,8 @@ static int nl80211_nan_add_func(struct sk_buff *skb,
break;
case NL80211_NAN_FUNC_FOLLOW_UP:
if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
- !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]) {
+ !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] ||
+ !tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]) {
err = -EINVAL;
goto out;
}
--
1.9.1
next reply other threads:[~2018-01-03 3:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-03 3:00 Hao Chen [this message]
2018-01-04 15:09 ` Johannes Berg
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