diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2005-05-19 12:39:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-05-19 12:39:49 -0700 |
| commit | 31c26852cb2ac77f1d4acb37bcf31f165fd5eb68 (patch) | |
| tree | ce2e98c79f4d9051baff55c5f5fdb90defb9e18e /net/xfrm/xfrm_user.c | |
| parent | b9e9dead05b19e7f52c9aa00cd3a5b7ac4fcacf4 (diff) | |
| download | lwn-31c26852cb2ac77f1d4acb37bcf31f165fd5eb68.tar.gz lwn-31c26852cb2ac77f1d4acb37bcf31f165fd5eb68.zip | |
[IPSEC]: Verify key payload in verify_one_algo
We need to verify that the payload contains enough data so that
attach_one_algo can copy alg_key_len bits from the payload.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_user.c')
| -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 && |