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Bluetooth: Fix user channel for 32bit userspace on 64bit kernel 

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 <szymon.janc@codecoup.pl>
Signed-off-by: Marko Kiiskila <marko@runtime.io>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Szymon Janc 2017-04-24 18:25:04 -07:00 committed by Marcel Holtmann
parent 763d9a302a
commit ab89f0bdd6
1 changed files with 2 additions and 1 deletions
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3
net/bluetooth/hci_sock.c
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@ -1680,7 +1680,8 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
if (msg->msg_flags & MSG_OOB) if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP; 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; return -EINVAL;
if (len < 4 || len > HCI_MAX_FRAME_SIZE) if (len < 4 || len > HCI_MAX_FRAME_SIZE)