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[PATCH] net/socket: fix bug in sys_accept

To: "David S. Miller" <davem@xxxxxxxxxx>
Subject: [PATCH] net/socket: fix bug in sys_accept
From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>
Date: Tue, 6 May 2003 22:12:29 -0300
Cc: Sridhar Samudrala <sri@xxxxxxxxxx>, Roger Luethi <rl@xxxxxxxxxxx>, netdev@xxxxxxxxxxx, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>
Mail-followup-to: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxx>, Sridhar Samudrala <sri@xxxxxxxxxx>, Roger Luethi <rl@xxxxxxxxxxx>, netdev@xxxxxxxxxxx, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>
Organization: Conectiva S.A.
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mutt/1.5.4i
Hi David,

        Please pull from:

bk://kernel.bkbits.net/acme/unix-2.5

        Sridhar, thanks, this indeed fixed the problems that Roger was
having, I tested this in vmware using unix sockets as modules and running
a full gnome2 installation + gkrellm.

- Arnaldo

You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.

===================================================================


ChangeSet@xxxxxx, 2003-05-06 21:50:40-03:00, sri@xxxxxxxxxx
  o net/socket: fix bug in sys_accept
  
  module_put() gets called twice on error. Once via the explicit module_put and
  the second via sock_release(). Also i think we should do a __module_get() with
  newsock's owner(although same as the original listening sock).


 socket.c |   12 +++++-------
 1 files changed, 5 insertions(+), 7 deletions(-)


diff -Nru a/net/socket.c b/net/socket.c
--- a/net/socket.c      Tue May  6 21:57:15 2003
+++ b/net/socket.c      Tue May  6 21:57:15 2003
@@ -1280,26 +1280,26 @@
         * We don't need try_module_get here, as the listening socket (sock)
         * has the protocol module (sock->ops->owner) held.
         */
-       __module_get(sock->ops->owner);
+       __module_get(newsock->ops->owner);
 
        err = sock->ops->accept(sock, newsock, sock->file->f_flags);
        if (err < 0)
-               goto out_module_put;
+               goto out_release;
 
        if (upeer_sockaddr) {
                if(newsock->ops->getname(newsock, (struct sockaddr *)address, 
&len, 2)<0) {
                        err = -ECONNABORTED;
-                       goto out_module_put;
+                       goto out_release;
                }
                err = move_addr_to_user(address, len, upeer_sockaddr, 
upeer_addrlen);
                if (err < 0)
-                       goto out_module_put;
+                       goto out_release;
        }
 
        /* File flags are not inherited via accept() unlike another OSes. */
 
        if ((err = sock_map_fd(newsock)) < 0)
-               goto out_module_put;
+               goto out_release;
 
        security_socket_post_accept(sock, newsock);
 
@@ -1307,8 +1307,6 @@
        sockfd_put(sock);
 out:
        return err;
-out_module_put:
-       module_put(sock->ops->owner);
 out_release:
        sock_release(newsock);
        goto out_put;

===================================================================


This BitKeeper patch contains the following changesets:
1.1081
## Wrapped with gzip_uu ##


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