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hw/i386/vmmouse: Require 'i8042' property to be set

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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: 91c9e09147 ("vmmouse: convert to qdev")
Reported-by: Calvin Buckley <calvin@cmpct.info>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/752
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211201223253.36080-1-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-12-01 23:32:53 +01:00 committed by Paolo Bonzini
parent 08c34c642d
commit 5a3a2eb3b1
1 changed files with 4 additions and 0 deletions
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hw/i386/vmmouse.c
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@ -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;