From: Alexander Aring <aahringo@redhat.com>
Date: Mon, 5 Apr 2021 00:30:46 +0000 (-0400)
Subject: net: ieee802154: forbid monitor for add llsec dev
X-Git-Tag: v4.4.268~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=91a35cfd989b5635adad13909688c1f25ef2afcc;p=thirdparty%2Fkernel%2Fstable.git

net: ieee802154: forbid monitor for add llsec dev

[ Upstream commit 5303f956b05a2886ff42890908156afaec0f95ac ]

This patch forbids to add llsec dev for monitor interfaces which we
don't support yet. Otherwise we will access llsec mib which isn't
initialized for monitors.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-8-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index e4ba6764c4a30..a602fd45e384d 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1750,6 +1750,9 @@ static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
 	struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
 	struct ieee802154_llsec_device dev_desc;
 
+	if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+		return -EOPNOTSUPP;
+
 	if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
 					  &dev_desc) < 0)
 		return -EINVAL;