Commit 1454d33f authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Paolo Bonzini

hostmem: fix QEMU crash by 'info memdev'

'info memdev' crashes QEMU:
   (qemu) info memdev
   Unexpected error in parse_str() at qapi/string-input-visitor.c:111:
   Parameter 'null' expects an int64 value or range
It is caused by null uint16List is returned if 'host-nodes' is the default
value

Return MAX_NODES under this case to fix this bug
Signed-off-by: 's avatarXiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: 's avatarPaolo Bonzini <pbonzini@redhat.com>
parent aa5cb7f5
......@@ -64,6 +64,14 @@ out:
error_propagate(errp, local_err);
}
static uint16List **host_memory_append_node(uint16List **node,
unsigned long value)
{
*node = g_malloc0(sizeof(**node));
(*node)->value = value;
return &(*node)->next;
}
static void
host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
......@@ -74,25 +82,23 @@ host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
unsigned long value;
value = find_first_bit(backend->host_nodes, MAX_NODES);
node = host_memory_append_node(node, value);
if (value == MAX_NODES) {
return;
goto out;
}
*node = g_malloc0(sizeof(**node));
(*node)->value = value;
node = &(*node)->next;
do {
value = find_next_bit(backend->host_nodes, MAX_NODES, value + 1);
if (value == MAX_NODES) {
break;
}
*node = g_malloc0(sizeof(**node));
(*node)->value = value;
node = &(*node)->next;
node = host_memory_append_node(node, value);
} while (true);
out:
visit_type_uint16List(v, name, &host_nodes, errp);
}
......
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