Commit 3d1eac2f authored by Alexander Aring's avatar Alexander Aring Committed by Stefan Schmidt
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net: ieee802154: fix nl802154 del llsec dev 



This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_DEVICE is
not set by the user. If this is the case nl802154 will return -EINVAL.

Reported-by: default avatar <syzbot+d946223c2e751d136c94@syzkaller.appspotmail.com>
Signed-off-by: default avatarAlexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210221174321.14210-2-aahringo@redhat.com


Signed-off-by: default avatarStefan Schmidt <stefan@datenfreihafen.org>
parent 37feaaf5

net/ieee802154/nl802154.c

+2 −1
Original line number Diff line number Diff line
@@ -1758,7 +1758,8 @@ static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info) 
	struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];

	__le64 extended_addr;



	if (nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack))

	if (!info->attrs[NL802154_ATTR_SEC_DEVICE] ||

	    nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack))

		return -EINVAL;



	if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])