diff options
| author | Mathias Krause <minipli@googlemail.com> | 2012-08-15 11:31:50 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-02 09:47:16 -0700 |
| commit | 00553f5b9fd16a2c2287e41cc18217bdc7f9d310 (patch) | |
| tree | b0186293ce1296309f6b2306b7ae6fb860f4ef5e /net/bluetooth | |
| parent | 416a675770e625f4f5ccef3ce70b560abc94757a (diff) | |
Bluetooth: RFCOMM - Fix info leak via getsockname()
[ Upstream commit 9344a972961d1a6d2c04d9008b13617bcb6ec2ef ]
The RFCOMM code fails to initialize the trailing padding byte of struct
sockaddr_rc added for alignment. It that for leaks one byte kernel stack
via the getsockname() syscall. Add an explicit memset(0) before filling
the structure 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 1b10727ce52..9dfe702ce11 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -544,6 +544,7 @@ static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int * BT_DBG("sock %p, sk %p", sock, sk); + memset(sa, 0, sizeof(*sa)); sa->rc_family = AF_BLUETOOTH; sa->rc_channel = rfcomm_pi(sk)->channel; if (peer) |