3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alex Elder <[email protected]> (cherry picked from commit 3da54776e2c0385c32d143fd497a7f40a88e29dd) Move the addition of the authorizer buffer to a connection's out_kvec out of get_connect_authorizer() and into its caller. This way, the caller--prepare_write_connect()--can avoid adding the connect header to out_kvec before it has been fully initialized. Prior to this patch, it was possible for a connect header to be sent over the wire before the authorizer protocol or buffer length fields were initialized. An authorizer buffer associated with that header could also be queued to send only after the connection header that describes it was on the wire. Fixes http://tracker.newdream.net/issues/2424 Signed-off-by: Alex Elder <[email protected]> Reviewed-by: Sage Weil <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/ceph/messenger.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -656,8 +656,6 @@ static void prepare_write_keepalive(stru static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, int *auth_proto) { - void *auth_buf; - int auth_len; struct ceph_auth_handshake *auth; if (!con->ops->get_authorizer) { @@ -680,15 +678,9 @@ static struct ceph_auth_handshake *get_c if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->state)) return ERR_PTR(-EAGAIN); - auth_buf = auth->authorizer_buf; - auth_len = auth->authorizer_buf_len; con->auth_reply_buf = auth->authorizer_reply_buf; con->auth_reply_buf_len = auth->authorizer_reply_buf_len; - con->out_connect.authorizer_len = cpu_to_le32(auth_len); - - if (auth_len) - ceph_con_out_kvec_add(con, auth_len, auth_buf); return auth; } @@ -737,12 +729,20 @@ static int prepare_write_connect(struct con->out_connect.protocol_version = cpu_to_le32(proto); con->out_connect.flags = 0; - ceph_con_out_kvec_add(con, sizeof (con->out_connect), &con->out_connect); auth_proto = CEPH_AUTH_UNKNOWN; auth = get_connect_authorizer(con, &auth_proto); if (IS_ERR(auth)) return PTR_ERR(auth); + con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); + con->out_connect.authorizer_len = auth ? + cpu_to_le32(auth->authorizer_buf_len) : 0; + + ceph_con_out_kvec_add(con, sizeof (con->out_connect), + &con->out_connect); + if (auth && auth->authorizer_buf_len) + ceph_con_out_kvec_add(con, auth->authorizer_buf_len, + auth->authorizer_buf); con->out_more = 0; set_bit(WRITE_PENDING, &con->state); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
