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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: Mathias 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: David S. Miller <davem@davemloft.net>
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@ -694,6 +694,7 @@ static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
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*addr_len = sizeof(*haddr);
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haddr->hci_family = AF_BLUETOOTH;
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haddr->hci_dev = hdev->id;
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haddr->hci_channel= 0;
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release_sock(sk);
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return 0;
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