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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: syzbot+d946223c2e751d136c94@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210221174321.14210-2-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
This commit is contained in:
Alexander Aring 2021-02-21 12:43:19 -05:00 committed by Stefan Schmidt
parent 37feaaf5ce
commit 3d1eac2f45
1 changed files with 2 additions and 1 deletions
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3
net/ieee802154/nl802154.c
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@ -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])