From 37f7f421cce13435fdc0d870caf51141e5ebf079 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 16 Sep 2005 16:51:01 -0700 Subject: [PATCH] [NET]: Do not leak MSG_CMSG_COMPAT into userspace. Noticed by Sridhar Samudrala. Signed-off-by: David S. Miller --- net/socket.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/socket.c b/net/socket.c index c699e93c33d..f9264472377 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1862,7 +1862,8 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flag if (err < 0) goto out_freeiov; } - err = __put_user(msg_sys.msg_flags, COMPAT_FLAGS(msg)); + err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT), + COMPAT_FLAGS(msg)); if (err) goto out_freeiov; if (MSG_CMSG_COMPAT & flags)