Thread (2 messages) 2 messages, 2 authors, 2016-07-14

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

STALE3735d

From: Amadeusz Sławiński <hidden>
Date: 2016-07-14 08:50:38
Also in: lkml
Subsystem: bluetooth subsystem, the rest · Maintainers: Marcel Holtmann, Luiz Augusto von Dentz, Linus Torvalds

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 <redacted>
---
 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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