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

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commit ab89f0bdd6 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Szymon Janc 2017-04-24 18:25:04 -07:00 committed by Greg Kroah-Hartman
parent 89c91ea375
commit 518ca84479
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)
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)