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| author | Alexander Aring <aahringo@redhat.com> | 2021-02-21 12:43:20 -0500 |
|---|---|---|
| committer | Stefan Schmidt <stefan@datenfreihafen.org> | 2021-02-24 14:33:58 +0100 |
| commit | 20d5fe2d7103f5c43ad11a3d6d259e9d61165c35 (patch) | |
| tree | 069a6908c69a93c49615e27e1e5ac2db3c87868f /net/ieee802154 | |
| parent | 3d1eac2f45585690d942cf47fd7fbd04093ebd1b (diff) | |
| download | lwn-20d5fe2d7103f5c43ad11a3d6d259e9d61165c35.tar.gz lwn-20d5fe2d7103f5c43ad11a3d6d259e9d61165c35.zip | |
net: ieee802154: fix nl802154 add llsec key
This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_KEY is
not set by the user. If this is the case nl802154 will return -EINVAL.
Reported-by: syzbot+ce4e062c2d51977ddc50@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210221174321.14210-3-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Diffstat (limited to 'net/ieee802154')
| -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 460e53889781..4aa9000b7eea 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1544,7 +1544,8 @@ static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info) struct ieee802154_llsec_key_id id = { }; u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { }; - if (nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack)) + if (!info->attrs[NL802154_ATTR_SEC_KEY] || + nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack)) return -EINVAL; if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] || |