hw/smbios: Fix OEM strings table option validation

qemu_smbios_type11_opts did not have the list terminator and that
resulted in out-of-bound memory access. It also needs to have an element
for the type option.

Cc: qemu-stable@nongnu.org
Fixes: 2d6dcbf ("smbios: support setting OEM strings table")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit cd8a35b)

hw/smbios/smbios.c

@@ -369,6 +369,11 @@ static const QemuOptDesc qemu_smbios_type8_opts[] = {
 };
 
 static const QemuOptDesc qemu_smbios_type11_opts[] = {
+    {
+        .name = "type",
+        .type = QEMU_OPT_NUMBER,
+        .help = "SMBIOS element type",
+    },
     {
         .name = "value",
         .type = QEMU_OPT_STRING,
@@ -379,6 +384,7 @@ static const QemuOptDesc qemu_smbios_type11_opts[] = {
         .type = QEMU_OPT_STRING,
         .help = "OEM string data from file",
     },
+    { /* end of list */ }
 };
 
 static const QemuOptDesc qemu_smbios_type17_opts[] = {