[PATCH] sparse: econet annotation

econet partially annotated.

It's still badly broken - it mixes userland and kernel chunks in the
same iovec, then does set_fs(KERNEL_FS) and sends that to
sock_sendmsg().  Do we still want to support that protocol family,
anyway?

diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 00ab04ef5b043f1f6f3428dccf1c8bcb7447dfac..6bcfb5974de5c765f936992a2225fd770247f14c 100644 (file)
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -418,10 +418,18 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
 
        /* tack our header on the front of the iovec */
        size = sizeof(struct aunhdr);
+       /*
+        * XXX: that is b0rken.  We can't mix userland and kernel pointers
+        * in iovec, since on a lot of platforms copy_from_user() will
+        * *not* work with the kernel and userland ones at the same time,
+        * regardless of what we do with set_fs().  And we are talking about
+        * econet-over-ethernet here, so "it's only ARM anyway" doesn't
+        * apply.  Any suggestions on fixing that code?         -- AV
+        */
        iov[0].iov_base = (void *)&ah;
        iov[0].iov_len = size;
        for (i = 0; i < msg->msg_iovlen; i++) {
-               void *base = msg->msg_iov[i].iov_base;
+               void __user *base = msg->msg_iov[i].iov_base;
                size_t len = msg->msg_iov[i].iov_len;
                /* Check it now since we switch to KERNEL_DS later. */
                if ((err = verify_area(VERIFY_READ, base, len)) < 0)
@@ -589,7 +597,7 @@ out:
  *     Handle Econet specific ioctls
  */
 
-static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void *arg)
+static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
 {
        struct ifreq ifr;
        struct ec_device *edev;
@@ -662,18 +670,19 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void *arg)
 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
        struct sock *sk = sock->sk;
+       void __user *argp = (void __user *)arg;
 
        switch(cmd) {
                case SIOCGSTAMP:
-                       return sock_get_timestamp(sk,(struct timeval __user *)arg);
+                       return sock_get_timestamp(sk, argp);
 
                case SIOCSIFADDR:
                case SIOCGIFADDR:
-                       return ec_dev_ioctl(sock, cmd, (void *)arg);
+                       return ec_dev_ioctl(sock, cmd, argp);
                        break;
 
                default:
-                       return dev_ioctl(cmd,(void __user *) arg);
+                       return dev_ioctl(cmd, argp);
        }
        /*NOTREACHED*/
        return 0;