From: Philippe Mathieu-Daudé <f4...@amsat.org> If the 'i8042' property is not set, mouse events handled by vmmouse_mouse_event() end calling i8042_isa_mouse_fake_event() with a NULL argument, resulting in ps2_mouse_fake_event() being called with invalid PS2MouseState pointer. Fix by requiring the 'i8042' property to be always set:
$ qemu-system-x86_64 -device vmmouse qemu-system-x86_64: -device vmmouse: 'i8042' link is not set Fixes: 91c9e09147b ("vmmouse: convert to qdev") Reported-by: Calvin Buckley <cal...@cmpct.info> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/752 Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> Message-Id: <20211201223253.36080-1-f4...@amsat.org> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- hw/i386/vmmouse.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/i386/vmmouse.c b/hw/i386/vmmouse.c index 3d66368286..a56c185f15 100644 --- a/hw/i386/vmmouse.c +++ b/hw/i386/vmmouse.c @@ -286,6 +286,10 @@ static void vmmouse_realizefn(DeviceState *dev, Error **errp) DPRINTF("vmmouse_init\n"); + if (!s->i8042) { + error_setg(errp, "'i8042' link is not set"); + return; + } if (!object_resolve_path_type("", TYPE_VMPORT, NULL)) { error_setg(errp, "vmmouse needs a machine with vmport"); return; -- 2.33.1