diff options
| author | Igor Mammedov <imammedo@redhat.com> | 2019-02-14 05:57:33 -0500 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2019-03-06 11:51:08 -0300 |
| commit | 15160ab72ca48c86800b9227dfe806f27f7caf08 (patch) | |
| tree | 9aac391fff195b5dedda9f2edcbdb9eaf8f236a4 | |
| parent | 12b2e9f30f978f26f35f9df5c2ef96fbc019bab6 (diff) | |
hostmem: fix crash when querying empty host-nodes property via QMP
QEMU will crashes with
qapi/qobject-output-visitor.c:210: qobject_output_complete: Assertion `qov->root && ((&qov->stack)->slh_first == ((void *)0))' failed
when trying to get value of not set hostmem's "host-nodes"
property, HostMemoryBackend::host_nodes bitmap doesn't have
any bits set in it, which leads to find_first_bit() returning
MAX_NODES and consequently to an early return from
host_memory_backend_get_host_nodes() without calling visitor.
Fix it by calling visitor even if "host-nodes" property wasn't
set before exiting from property getter to return valid empty
list.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20190214105733.25643-1-imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
| -rw-r--r-- | backends/hostmem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/backends/hostmem.c b/backends/hostmem.c index 87b19d2111..04baf479a1 100644 --- a/backends/hostmem.c +++ b/backends/hostmem.c @@ -88,7 +88,7 @@ host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, value = find_first_bit(backend->host_nodes, MAX_NODES); if (value == MAX_NODES) { - return; + goto ret; } *node = g_malloc0(sizeof(**node)); @@ -106,6 +106,7 @@ host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name, node = &(*node)->next; } while (true); +ret: visit_type_uint16List(v, name, &host_nodes, errp); } |