diff options
| -rw-r--r-- | net/xfrm/xfrm_user.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 15ba08602aa1..97509011c274 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -34,14 +34,21 @@ static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) { struct rtattr *rt = xfrma[type - 1]; struct xfrm_algo *algp; + int len; if (!rt) return 0; - if ((rt->rta_len - sizeof(*rt)) < sizeof(*algp)) + len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); + if (len < 0) return -EINVAL; algp = RTA_DATA(rt); + + len -= (algp->alg_key_len + 7U) / 8; + if (len < 0) + return -EINVAL; + switch (type) { case XFRMA_ALG_AUTH: if (!algp->alg_key_len && |