Return-Path: From: Szymon Janc To: linux-bluetooth@vger.kernel.org Cc: Szymon Janc , Marko Kiiskila Subject: [PATCH] Bluetooth: Fix user channel for 32bit userspace on 64bit kernel Date: Mon, 24 Apr 2017 18:25:04 -0700 Message-Id: <20170425012504.30505-1-szymon.janc@codecoup.pl> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Running 32bit userspace on 64bit kernel results in MSG_CMSG_COMPAT being defined as 0x80000000. This results in sendmsg failure if used from 32bit userspace running on 64bit kernel. Fix this by accounting for MSG_CMSG_COMPAT in flags check in hci_sock_sendmsg. Signed-off-by: Szymon Janc Signed-off-by: Marko Kiiskila --- net/bluetooth/hci_sock.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index f64d656..e9d3e1b 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -1680,7 +1680,8 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, if (msg->msg_flags & MSG_OOB) return -EOPNOTSUPP; - if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE)) + if (msg->msg_flags & + ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE|MSG_CMSG_COMPAT)) return -EINVAL; if (len < 4 || len > HCI_MAX_FRAME_SIZE) -- 2.9.3