1 files changed, 10 insertions, 5 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 86de99ad2976..01625ccc3ae6 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1246,6 +1246,15 @@ static int unix_socketpair(struct socket *socka, struct socket *sockb)
         return 0;
 }
 
+static void unix_sock_inherit_flags(const struct socket *old,
+                                    struct socket *new)
+{
+        if (test_bit(SOCK_PASSCRED, &old->flags))
+                set_bit(SOCK_PASSCRED, &new->flags);
+        if (test_bit(SOCK_PASSSEC, &old->flags))
+                set_bit(SOCK_PASSSEC, &new->flags);
+}
+
 static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
 {
         struct sock *sk = sock->sk;
@@ -1280,6 +1289,7 @@ static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
         /* attach accepted sock to socket */
         unix_state_lock(tsk);
         newsock->state = SS_CONNECTED;
+        unix_sock_inherit_flags(sock, newsock);
         sock_graft(tsk, newsock);
         unix_state_unlock(tsk);
         return 0;
@@ -1744,7 +1754,6 @@ static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
 {
         struct unix_sock *u = unix_sk(sk);
 
-        msg->msg_namelen = 0;
         if (u->addr) {
                 msg->msg_namelen = u->addr->len;
                 memcpy(msg->msg_name, u->addr->name, u->addr->len);
@@ -1768,8 +1777,6 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         if (flags&MSG_OOB)
                 goto out;
 
-        msg->msg_namelen = 0;
-
         err = mutex_lock_interruptible(&u->readlock);
         if (err) {
                 err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
@@ -1914,8 +1921,6 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
         target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
         timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
 
-        msg->msg_namelen = 0;
-
         /* Lock the socket to prevent queue disordering
          * while sleeps in memcpy_tomsg
          */