Merge branch 'upstream-fixes' into upstream

[pandora-kernel.git] / net / unix / af_unix.c

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index aca6501..de6ec51 100644 (file)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -128,23 +128,17 @@ static atomic_t unix_nr_socks = ATOMIC_INIT(0);
 #define UNIX_ABSTRACT(sk)      (unix_sk(sk)->addr->hash != UNIX_HASH_SIZE)
 
 #ifdef CONFIG_SECURITY_NETWORK
-static void unix_get_peersec_dgram(struct sk_buff *skb)
+static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-       int err;
-
-       err = security_socket_getpeersec_dgram(skb, UNIXSECDATA(skb),
-                                              UNIXSECLEN(skb));
-       if (err)
-               *(UNIXSECDATA(skb)) = NULL;
+       memcpy(UNIXSID(skb), &scm->secid, sizeof(u32));
 }
 
 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-       scm->secdata = *UNIXSECDATA(skb);
-       scm->seclen = *UNIXSECLEN(skb);
+       scm->secid = *UNIXSID(skb);
 }
 #else
-static void unix_get_peersec_dgram(struct sk_buff *skb)
+static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 { }
 
 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
@@ -565,6 +559,14 @@ static struct proto unix_proto = {
        .obj_size = sizeof(struct unix_sock),
 };
 
+/*
+ * AF_UNIX sockets do not interact with hardware, hence they
+ * dont trigger interrupts - so it's safe for them to have
+ * bh-unsafe locking for their sk_receive_queue.lock. Split off
+ * this special lock-class by reinitializing the spinlock key:
+ */
+static struct lock_class_key af_unix_sk_receive_queue_lock_key;
+
 static struct sock * unix_create1(struct socket *sock)
 {
        struct sock *sk = NULL;
@@ -580,6 +582,8 @@ static struct sock * unix_create1(struct socket *sock)
        atomic_inc(&unix_nr_socks);
 
        sock_init_data(sock,sk);
+       lockdep_set_class(&sk->sk_receive_queue.lock,
+                               &af_unix_sk_receive_queue_lock_key);
 
        sk->sk_write_space      = unix_write_space;
        sk->sk_max_ack_backlog  = sysctl_unix_max_dgram_qlen;
@@ -653,11 +657,10 @@ static int unix_autobind(struct socket *sock)
                goto out;
 
        err = -ENOMEM;
-       addr = kmalloc(sizeof(*addr) + sizeof(short) + 16, GFP_KERNEL);
+       addr = kzalloc(sizeof(*addr) + sizeof(short) + 16, GFP_KERNEL);
        if (!addr)
                goto out;
 
-       memset(addr, 0, sizeof(*addr) + sizeof(short) + 16);
        addr->name->sun_family = AF_UNIX;
        atomic_set(&addr->refcnt, 1);
 
@@ -1045,7 +1048,7 @@ restart:
                goto out_unlock;
        }
 
-       unix_state_wlock(sk);
+       unix_state_wlock_nested(sk);
 
        if (sk->sk_state != st) {
                unix_state_wunlock(sk);
@@ -1313,8 +1316,7 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
        memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
        if (siocb->scm->fp)
                unix_attach_fds(siocb->scm, skb);
-
-       unix_get_peersec_dgram(skb);
+       unix_get_secdata(siocb->scm, skb);
 
        skb->h.raw = skb->data;
        err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);