From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ upstream commit 2196937e12b1b4ba139806d132647e1651d655df ]
We could be reading 8 bytes into a 4 byte buffer here. It seems
harmless but adding a check is the right thing to do and it silences a
static checker warning.
Cc: <stable@xxxxxxxxxxxxxxx> # 3.2.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.4.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.10.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.12.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.14.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.16.x
Cc: <stable@xxxxxxxxxxxxxxx> # 3.17.x
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
net/netfilter/ipset/ip_set_core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index 86f9d76..d259da3 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -1863,6 +1863,12 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len)
if (*op < IP_SET_OP_VERSION) {
/* Check the version at the beginning of operations */
struct ip_set_req_version *req_version = data;
+
+ if (*len < sizeof(struct ip_set_req_version)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
if (req_version->version != IPSET_PROTOCOL) {
ret = -EPROTO;
goto done;
--
1.7.10.4
--
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