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authorHerbert Xu <herbert@gondor.apana.org.au>2005-05-19 12:39:04 -0700
committerDavid S. Miller <davem@davemloft.net>2005-05-19 12:39:04 -0700
commitb9e9dead05b19e7f52c9aa00cd3a5b7ac4fcacf4 (patch)
tree89852e61eaea7cd88c652e91b594fd8f4c312a9d
parent8be58932ca596972e4953ae980d8bc286857cae8 (diff)
[IPSEC]: Fixed alg_key_len usage in attach_one_algo
The variable alg_key_len is in bits and not bytes. The function attach_one_algo is currently using it as if it were in bytes. This causes it to read memory which may not be there. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/xfrm/xfrm_user.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 5ddda2c98af..15ba08602aa 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -162,6 +162,7 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
struct rtattr *rta = u_arg;
struct xfrm_algo *p, *ualg;
struct xfrm_algo_desc *algo;
+ int len;
if (!rta)
return 0;
@@ -173,11 +174,12 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
return -ENOSYS;
*props = algo->desc.sadb_alg_id;
- p = kmalloc(sizeof(*ualg) + ualg->alg_key_len, GFP_KERNEL);
+ len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
+ p = kmalloc(len, GFP_KERNEL);
if (!p)
return -ENOMEM;
- memcpy(p, ualg, sizeof(*ualg) + ualg->alg_key_len);
+ memcpy(p, ualg, len);
*algpp = p;
return 0;
}