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| author | Alexander Aring <aahringo@redhat.com> | 2021-02-21 12:43:19 -0500 |
|---|---|---|
| committer | Stefan Schmidt <stefan@datenfreihafen.org> | 2021-02-24 14:14:19 +0100 |
| commit | 3d1eac2f45585690d942cf47fd7fbd04093ebd1b (patch) | |
| tree | 82c9d486d969fb851b93326249222b5b4c3521ca /net | |
| parent | 37feaaf5ceb2245e474369312bb7b922ce7bce69 (diff) | |
| download | linux-3d1eac2f45585690d942cf47fd7fbd04093ebd1b.tar.gz linux-3d1eac2f45585690d942cf47fd7fbd04093ebd1b.tar.bz2 linux-3d1eac2f45585690d942cf47fd7fbd04093ebd1b.zip | |
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')
| -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 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]) |