[PATCH] Bluetooth: fix oob in sco_sock_setsockopt

[Edward Adam Davis]

If optlen < sizeof(u32) it will trigger oob, so take the min of them.

Reported-by: syzbot+b71011ec0a23f4d15625@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Edward Adam Davis <eadavis@xxxxxx>
---
 net/bluetooth/sco.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 43daf965a01e..815646d9e72b 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -890,7 +890,7 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case BT_PKT_STATUS:
-		if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+		if (copy_from_sockptr(&opt, optval, min_t(int, sizeof(u32), optlen))) {
 			err = -EFAULT;
 			break;
 		}
-- 
2.43.0