path: root/net/bluetooth/rfcomm/sock.c
diff options
authorMathias Krause <minipli@googlemail.com>2012-08-15 11:31:50 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-15 21:36:31 -0700
commit9344a972961d1a6d2c04d9008b13617bcb6ec2ef (patch)
treec6cf635fe8226c8cb008b9f2717b992ac6f2f2ad /net/bluetooth/rfcomm/sock.c
parentf9432c5ec8b1e9a09b9b0e5569e3c73db8de432a (diff)
Bluetooth: RFCOMM - Fix info leak via getsockname()
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>
Diffstat (limited to 'net/bluetooth/rfcomm/sock.c')
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 64f55ca61472..1a17850d093c 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -528,6 +528,7 @@ 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)

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