[PATCH] Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU

From	Amadeusz Sławiński <amadeusz.slawinski@tieto.com>
Newsgroups	linux.kernel
Subject	[PATCH] Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU
Date	2016-07-14 11:00 +0200
Message-ID	<rUKF0-7ra-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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When we retrieve imtu value from userspace we should use 16 bit pointer
cast instead of 32 as it's defined that way in headers. Fixes setsockopt
calls on big-endian platforms.

Signed-off-by: Amadeusz Sławiński <amadeusz.slawinski@tieto.com>
---
 net/bluetooth/l2cap_sock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 388ee8b..1842141 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -927,7 +927,7 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
 			break;
 		}
 
-		if (get_user(opt, (u32 __user *) optval)) {
+		if (get_user(opt, (u16 __user *) optval)) {
 			err = -EFAULT;
 			break;
 		}
-- 
1.9.1

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[PATCH] Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU Amadeusz Sławiński   <amadeusz.slawinski@tieto.com> - 2016-07-14 11:00 +0200
  Re: [PATCH] Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU Marcel Holtmann <marcel@holtmann.org> - 2016-07-14 11:10 +0200

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