ngctl can crash the kernel

[David Rhodus]

Same panic here...

Also the MPD2 port is broken,  I'm guessing a netgraph problem too.

2010/11/5 sdfsdf rwerwer <freebsd-tracker-int0dh at mail.ru>:
>
> Hi everybody,
>
> The following commands lead the 9.0-CURRENT kernel to crash:
>
>
> [root at freebsd /usr/home/int0dh]# ngctl
> Available commands:
>  config get or set configuration of node at <path>
>  connect Connects hook <peerhook> of the node at <relpath> to <hook>
>  debug Get/set debugging verbosity level
>  dot Produce a GraphViz (.dot) of the entire netgraph.
>  help Show command summary or get more help on a specific command
>  list Show information about all nodes
>  mkpeer Create and connect a new node to the node at "path"
>  msg Send a netgraph control message to the node at "path"
>  name Assign name <name> to the node at <path>
>  read Read and execute commands from a file
>  rmhook Disconnect hook "hook" of the node at "path"
>  show Show information about the node at <path>
>  shutdown Shutdown the node at <path>
>  status Get human readable status information from the node at <path>
>  types Show information about all installed node types
>  write Send a data packet down the hook named by "hook".
>  quit Exit program
> + mkpeer ksocket myhook inet/stream/tcp
> + msg .:myhook connect inet/127.0.0.1:22
>
> After last command the kernel panics.
>
>
> Any listening TCP port can be used instead of 22.
> The panic occurs here (sys/kern/uipc_sockbuf.c):
>
>
> int
> sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa,
>    struct mbuf *m0, struct mbuf *control)
> {
>        struct mbuf *m, *n, *nlast;
>        int space = asa->sa_len;
>
>        SOCKBUF_LOCK_ASSERT(sb);
>
>        if (m0 && (m0->m_flags & M_PKTHDR) == 0)
>        {
>                panic("sbappendaddr_locked" ;
>        }
>
> I`ve tried with the custom kernel only, but I think that issue can be reproduced with GENERIC too.
>
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