The HCI code fails to initialize the hci_channel member of struct
sockaddr_hci and that for leaks two bytes kernel stack via the
getsockname() syscall. Initialize hci_channel with 0 to avoid the
info leak.
Signed-off-by: Mathias Krause <mini...@googlemail.com>
Cc: Marcel Holtmann <mar...@holtmann.org>
Cc: Gustavo Padovan <gust...@padovan.org>
Cc: Johan Hedberg <johan.hedb...@gmail.com>
---
net/bluetooth/hci_sock.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index a27bbc3..19fdac7 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -694,6 +694,7 @@ static int hci_sock_getname(struct socket *sock, struct
sockaddr *addr,
*addr_len = sizeof(*haddr);
haddr->hci_family = AF_BLUETOOTH;
haddr->hci_dev = hdev->id;
+ haddr->hci_channel= 0;
release_sock(sk);
return 0;
--
1.7.10.4
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