lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <v2x7447a0ac1004212029qd1866eaekc769fee5b13ac09d@mail.gmail.com>
Date:	Wed, 21 Apr 2010 20:29:25 -0700
From:	Pavel Pergamenshchik <ppergame@...il.com>
To:	netdev@...r.kernel.org, davem@...emloft.net
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] net: change recvform to return same address length as 
	getsockname on unnamed unix sockets

unix_*_recvmsg() returns zero-length sockaddr if the sender is an
unnamed AF_UNIX socket. Change it to return a two-byte sockaddr with
just the address family, to be consistent with unix_getname().

Signed-off-by: Pavel Pergamenshchik <ppergame@...il.com>

---
Minimal example at http://xzrq.net/uaddrwtf.c
Solaris/OS X print 16 and 16. Linux prints 0 and 2 as described above.

--- a/net/unix/af_unix.c	2010-04-01 16:02:33.000000000 -0700
+++ b/net/unix/af_unix.c	2010-04-21 20:17:43.564703748 -0700
@@ -1634,9 +1634,13 @@
 static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
 {
 	struct unix_sock *u = unix_sk(sk);
+	struct sockaddr_un *sunaddr;

-	msg->msg_namelen = 0;
-	if (u->addr) {
+	if (!u->addr) {
+		msg->msg_namelen = sizeof(short);
+		sunaddr = msg->msg_name;
+		sunaddr->sun_family = AF_UNIX;
+	} else {
 		msg->msg_namelen = u->addr->len;
 		memcpy(msg->msg_name, u->addr->name, u->addr->len);
 	}
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ