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    Subject[018/101] net/9p: fix client code to fail more gracefully on protocol error
    2.6.33-longterm review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Eric Van Hensbergen <ericvh@gmail.com>

    commit b85f7d92d7bd7e3298159e8b1eed8cb8cbbb0348 upstream.

    There was a BUG_ON to protect against a bad id which could be dealt with
    more gracefully.

    Reported-by: Natalie Orlin <norlin@us.ibm.com>
    Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    net/9p/client.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/net/9p/client.c
    +++ b/net/9p/client.c
    @@ -230,7 +230,8 @@ struct p9_req_t *p9_tag_lookup(struct p9
    * buffer to read the data into */
    tag++;

    - BUG_ON(tag >= c->max_tag);
    + if(tag >= c->max_tag)
    + return NULL;

    row = tag / P9_ROW_MAXTAG;
    col = tag % P9_ROW_MAXTAG;



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