diff mbox

[V2,1/4] qapi: output visitor crashes qemu if it encounters a NULL value

Message ID 1401108058-27348-2-git-send-email-marcel.a@redhat.com
State New
Headers show

Commit Message

Marcel Apfelbaum May 26, 2014, 12:40 p.m. UTC 
A NULL value is not added to visitor's stack, but there
is no check for that when the visitor tries to return
that value, leading to Qemu crash.

Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
---
 qapi/qmp-output-visitor.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c
index 74a5684..96b3384 100644
--- a/qapi/qmp-output-visitor.c
+++ b/qapi/qmp-output-visitor.c
@@ -66,6 +66,12 @@  static QObject *qmp_output_pop(QmpOutputVisitor *qov)
 static QObject *qmp_output_first(QmpOutputVisitor *qov)
 {
     QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack);
+
+    /* FIXME - find a better way to deal with NULL values */
+    if (!e) {
+        return NULL;
+    }
+
     return e->value;
 }