Commit 3f68ba07 authored by Mathias Krause's avatar Mathias Krause Committed by David S. Miller

Bluetooth: HCI - Fix info leak via getsockname()

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: default avatarMathias Krause <minipli@googlemail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e15ca9a0
...@@ -694,6 +694,7 @@ static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, ...@@ -694,6 +694,7 @@ static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
*addr_len = sizeof(*haddr); *addr_len = sizeof(*haddr);
haddr->hci_family = AF_BLUETOOTH; haddr->hci_family = AF_BLUETOOTH;
haddr->hci_dev = hdev->id; haddr->hci_dev = hdev->id;
haddr->hci_channel= 0;
release_sock(sk); release_sock(sk);
return 0; return 0;
......
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