[PATCH] unix domain sockets bugfix

[Balazs Scheidler]

Hi,

I've found a bug with unix domain sockets in both kernels 2.2 and 2.4.
If the program issues a recvfrom() on a SOCK_DGRAM socket, and the sender
had no name, the sockaddr returned is not filled in.

The returned socklen is 2, but the sockaddr.family is not touched. A fix is
below:

--- af_unix.c~	Mon Feb 25 20:38:16 2002
+++ af_unix.c	Fri Oct  4 09:46:26 2002
@@ -1392,6 +1392,9 @@
 		       sk->protinfo.af_unix.addr->name,
 		       sk->protinfo.af_unix.addr->len);
 	}
+	else {
+		((struct sockaddr *) msg->msg_name)->sa_family = AF_UNIX;
+	}
 }
 
 static int unix_dgram_recvmsg(struct socket *sock, struct msghdr *msg, int size,

-- 
Bazsi
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