Re: [PATCH wpan 2/4] net: ieee802154: fix nl802154 del llsec dev
From: Stefan Schmidt <stefan@datenfreihafen.org>
Date: 2021-02-24 15:20:05
Hello. On 21.02.21 18:43, Alexander Aring wrote:
quoted hunk ↗ jump to hunk
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> --- net/ieee802154/nl802154.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 2f0a138bd5eb..063b12cba71f 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c@@ -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])
This patch has been applied to the wpan tree and will be part of the next pull request to net. Thanks! regards Stefan Schmidt