[qemu-xen stable-4.16] chardev/wctable: don't free the instance in wctablet_chr_finalize

[patchbot@xxxxxxx]

commit 4658dfcbc09dcc90025604cce64d6fd01952b882
Author:     Daniil Tatianin <d-tatianin@xxxxxxxxxxxxxx>
AuthorDate: Wed Nov 17 17:23:49 2021 +0300
Commit:     Michael Roth <michael.roth@xxxxxxx>
CommitDate: Tue Dec 14 14:54:14 2021 -0600

    chardev/wctable: don't free the instance in wctablet_chr_finalize
    
    Object is supposed to be freed by invoking obj->free, and not
    obj->instance_finalize. This would lead to use-after-free followed by
    double free in object_unref/object_finalize.
    
    Signed-off-by: Daniil Tatianin <d-tatianin@xxxxxxxxxxxxxx>
    Reviewed-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
    Message-Id: <20211117142349.836279-1-d-tatianin@xxxxxxxxxxxxxx>
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
    (cherry picked from commit fdc6e168181d06391711171b7c409b34f2981ced)
    Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
---
 chardev/wctablet.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/chardev/wctablet.c b/chardev/wctablet.c
index 95e005f5a5..e8b292c43c 100644
--- a/chardev/wctablet.c
+++ b/chardev/wctablet.c
@@ -320,7 +320,6 @@ static void wctablet_chr_finalize(Object *obj)
     TabletChardev *tablet = WCTABLET_CHARDEV(obj);
 
     qemu_input_handler_unregister(tablet->hs);
-    g_free(tablet);
 }
 
 static void wctablet_chr_open(Chardev *chr,
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.16