From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Whilst the spec doesn't speak to it directly my assumption is that
a request for more operations than exist should result in an invalid
input error return.

Fixes: 77a8e9fe0ecb ("hw/cxl/cxl-mailbox-utils: Add support for Media operations discovery commands cxl r3.2 (8.2.10.9.5.3)")
Closes: https://lore.kernel.org/qemu-devel/CAFEAcA-p5wZkNxK7wNVq_3PAzEE-muOd1Def-0O-FSpck4DrBQ@mail.gmail.com/
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260102154731.474859-3-Jonathan.Cameron@huawei.com>
(cherry picked from commit 25465c0e1fd74d2118dfec03912f2595eeb497d7)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index cf1d048d99..9b99d44a80 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -2011,7 +2011,7 @@ static CXLRetCode media_operations_discovery(uint8_t *payload_in,
      * sub class command.
      */
     if (media_op_in_disc_pl->dpa_range_count ||
-        start_index > ARRAY_SIZE(media_op_matrix)) {
+        start_index + num_ops > ARRAY_SIZE(media_op_matrix)) {
         return CXL_MBOX_INVALID_INPUT;
     }
 
-- 
2.47.3