[PULL 01/11] vga: avoid crash if no default vga card

Laurent Vivier posted 11 patches 3 years, 7 months ago
Maintainers: Riku Voipio <riku.voipio@iki.fi>, Greg Kurz <groug@kaod.org>, Christian Schoenebeck <qemu_oss@crudebyte.com>, "Michael S. Tsirkin" <mst@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <ani@anisinha.ca>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Stefano Stabellini <sstabellini@kernel.org>, Anthony Perard <anthony.perard@citrix.com>, Paul Durrant <paul@xen.org>, John Snow <jsnow@redhat.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Peter Maydell <peter.maydell@linaro.org>, Jason Wang <jasowang@redhat.com>, Keith Busch <kbusch@kernel.org>, Klaus Jensen <its@irrelevant.dk>, "Cédric Le Goater" <clg@kaod.org>, Daniel Henrique Barboza <danielhb413@gmail.com>, David Gibson <david@gibson.dropbear.id.au>, Fam Zheng <fam@euphon.net>, Peter Xu <peterx@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>
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[PULL 01/11] vga: avoid crash if no default vga card
Posted by Laurent Vivier 3 years, 7 months ago
From: Guo Zhi <qtxuning1999@sjtu.edu.cn>

QEMU in some arch will crash when executing -vga help command, because
there is no default vga model.  Add check to this case and avoid crash.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/978

Signed-off-by: Guo Zhi <qtxuning1999@sjtu.edu.cn>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220503091724.970009-1-qtxuning1999@sjtu.edu.cn>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 softmmu/vl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/softmmu/vl.c b/softmmu/vl.c
index b24772841db3..3f264d4b0930 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -981,7 +981,8 @@ static void select_vgahw(const MachineClass *machine_class, const char *p)
 
             if (vga_interface_available(t) && ti->opt_name) {
                 printf("%-20s %s%s\n", ti->opt_name, ti->name ?: "",
-                       g_str_equal(ti->opt_name, def) ? " (default)" : "");
+                        (def && g_str_equal(ti->opt_name, def)) ?
+                        " (default)" : "");
             }
         }
         exit(0);
-- 
2.36.1