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authorAlexander Aring <aahringo@redhat.com>2021-02-21 20:43:19 +0300
committerStefan Schmidt <stefan@datenfreihafen.org>2021-02-24 16:14:19 +0300
commit3d1eac2f45585690d942cf47fd7fbd04093ebd1b (patch)
tree82c9d486d969fb851b93326249222b5b4c3521ca /net/ieee802154/nl802154.c
parent37feaaf5ceb2245e474369312bb7b922ce7bce69 (diff)
downloadlinux-3d1eac2f45585690d942cf47fd7fbd04093ebd1b.tar.xz
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>
Diffstat (limited to 'net/ieee802154/nl802154.c')
-rw-r--r--net/ieee802154/nl802154.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index f4a4d4a417e0..460e53889781 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])