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authorMathias Krause <minipli@googlemail.com>2012-08-15 15:31:51 +0400
committerDavid S. Miller <davem@davemloft.net>2012-08-16 08:36:31 +0400
commit792039c73cf176c8e39a6e8beef2c94ff46522ed (patch)
treef337e39a3194c1de2330e3d0acc0b76e91a8593d /net/bluetooth/l2cap_sock.c
parent9344a972961d1a6d2c04d9008b13617bcb6ec2ef (diff)
downloadlinux-792039c73cf176c8e39a6e8beef2c94ff46522ed.tar.xz
Bluetooth: L2CAP - Fix info leak via getsockname()
The L2CAP code fails to initialize the l2_bdaddr_type member of struct sockaddr_l2 and the padding byte added for alignment. It that for leaks two bytes 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/l2cap_sock.c')
-rw-r--r--net/bluetooth/l2cap_sock.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index b94abd30e6f9..1497edd191a2 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -245,6 +245,7 @@ static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *l
BT_DBG("sock %p, sk %p", sock, sk);
+ memset(la, 0, sizeof(struct sockaddr_l2));
addr->sa_family = AF_BLUETOOTH;
*len = sizeof(struct sockaddr_l2);