From: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Date: Tue, 15 Dec 2015 21:02:30 +0100
> The following program leads to leak of 6 bytes from kernel stack:
This should fix it:
====================
[PATCH] bluetooth: Validate socket address length in sco_sock_bind().
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
net/bluetooth/sco.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index fe12966..f52bcbf 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -526,6 +526,9 @@ static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
if (!addr || addr->sa_family != AF_BLUETOOTH)
return -EINVAL;
+ if (addr_len < sizeof(struct sockaddr_sco))
+ return -EINVAL;
+
lock_sock(sk);
if (sk->sk_state != BT_OPEN) {
--
2.4.1
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