This is a note to let you know that I've just added the patch titled
Bluetooth: Fix user channel for 32bit userspace on 64bit kernel
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-fix-user-channel-for-32bit-userspace-on-64bit-kernel.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ab89f0bdd63a3721f7cd3f064f39fc4ac7ca14d4 Mon Sep 17 00:00:00 2001
From: Szymon Janc <szymon.janc@xxxxxxxxxxx>
Date: Mon, 24 Apr 2017 18:25:04 -0700
Subject: Bluetooth: Fix user channel for 32bit userspace on 64bit kernel
From: Szymon Janc <szymon.janc@xxxxxxxxxxx>
commit ab89f0bdd63a3721f7cd3f064f39fc4ac7ca14d4 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@xxxxxxxxxxx>
Signed-off-by: Marko Kiiskila <marko@xxxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/bluetooth/hci_sock.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -1680,7 +1680,8 @@ static int hci_sock_sendmsg(struct socke
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)
Patches currently in stable-queue which might be from szymon.janc@xxxxxxxxxxx are
queue-4.9/bluetooth-fix-user-channel-for-32bit-userspace-on-64bit-kernel.patch