aboutsummaryrefslogtreecommitdiff
path: root/net/key
diff options
context:
space:
mode:
authorDan Carpenter <dan.carpenter@oracle.com>2012-09-27 22:21:19 +0000
committerDavid S. Miller <davem@davemloft.net>2012-10-01 17:15:06 -0400
commitf674e72ff1aad23a99c7c205473cf02c85c2ac33 (patch)
tree032274dd7d42c5feeb17fe8b944ce9709001e339 /net/key
parent862096a8bbf8f992f6d0a1a8786ffd3fc7437e48 (diff)
downloadlinux-f674e72ff1aad23a99c7c205473cf02c85c2ac33.tar.gz
net/key/af_key.c: add range checks on ->sadb_x_policy_len
Because sizeof() is size_t then if "len" is negative, it counts as a large positive value. The call tree looks like: pfkey_sendmsg() -> pfkey_process() -> pfkey_spdadd() -> parse_ipsecrequests() Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/key')
-rw-r--r--net/key/af_key.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 2ca7d7f6861..08897a3c7ec 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1923,6 +1923,9 @@ parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
+ if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
+ return -EINVAL;
+
while (len >= sizeof(struct sadb_x_ipsecrequest)) {
if ((err = parse_ipsecrequest(xp, rq)) < 0)
return err;