From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathias Krause Subject: [PATCH 04/14] Bluetooth: HCI - Fix info leak via getsockname() Date: Wed, 15 Aug 2012 23:31:47 +0200 Message-ID: <1345066317-22512-5-git-send-email-minipli@googlemail.com> References: <1345066317-22512-1-git-send-email-minipli@googlemail.com> Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Mathias Krause , Marcel Holtmann , Gustavo Padovan , Johan Hedberg To: "David S. Miller" Return-path: In-Reply-To: <1345066317-22512-1-git-send-email-minipli@googlemail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 Cc: Marcel Holtmann Cc: Gustavo Padovan Cc: Johan Hedberg --- 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