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| author | Alexander Aring <aahringo@redhat.com> | 2021-02-21 12:43:21 -0500 |
|---|---|---|
| committer | Stefan Schmidt <stefan@datenfreihafen.org> | 2021-02-24 14:34:35 +0100 |
| commit | 27c746869e1a135dffc2f2a80715bb7aa00445b4 (patch) | |
| tree | 9098ca3e41b826e221be4548ed5104054c03695e | |
| parent | 20d5fe2d7103f5c43ad11a3d6d259e9d61165c35 (diff) | |
| download | linux-stable-27c746869e1a135dffc2f2a80715bb7aa00445b4.tar.gz linux-stable-27c746869e1a135dffc2f2a80715bb7aa00445b4.tar.bz2 linux-stable-27c746869e1a135dffc2f2a80715bb7aa00445b4.zip | |
net: ieee802154: fix nl802154 del llsec devkey
This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_DEVKEY is
not set by the user. If this is the case nl802154 will return -EINVAL.
Reported-by: syzbot+368672e0da240db53b5f@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210221174321.14210-4-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
| -rw-r--r-- | net/ieee802154/nl802154.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 4aa9000b7eea..1600edb98107 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1916,7 +1916,8 @@ static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info struct ieee802154_llsec_device_key key; __le64 extended_addr; - if (nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack)) + if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] || + nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack)) return -EINVAL; if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]) |