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authorMathias Krause <minipli@googlemail.com>2012-08-15 15:31:47 +0400
committerDavid S. Miller <davem@davemloft.net>2012-08-16 08:36:30 +0400
commit3f68ba07b1da811bf383b4b701b129bfcb2e4988 (patch)
treea6632984849d7101a95ba8649db505b293507a00 /net
parente15ca9a0ef9a86f0477530b0f44a725d67f889ee (diff)
downloadlinux-3f68ba07b1da811bf383b4b701b129bfcb2e4988.tar.xz
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>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/hci_sock.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index a27bbc3cd4b7..19fdac78e555 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;