From: Alexander Aring <aahri...@redhat.com>

[ Upstream commit 9ec87e322428d4734ac647d1a8e507434086993d ]

This patch forbids to add llsec seclevel 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 <aahri...@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-14-aahri...@redhat.com
Signed-off-by: Stefan Schmidt <ste...@datenfreihafen.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 net/ieee802154/nl802154.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 10fc37e45e2b..f0b47d43c9f6 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2120,6 +2120,9 @@ static int nl802154_add_llsec_seclevel(struct sk_buff 
*skb,
        struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
        struct ieee802154_llsec_seclevel sl;
 
+       if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+               return -EOPNOTSUPP;
+
        if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
                                 &sl) < 0)
                return -EINVAL;
-- 
2.30.2



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