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Do not allow nullable arrays, which were not correctly implemented

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Nullable arrays, which are not used anywhere, were marshalled the same
way as an empty non-null array. The demarshalling logic did not
recognize anything as a null array. Given this, it seems better to just
explicitly not support it.

Fixes https://gitlab.freedesktop.org/wayland/wayland/-/issues/306.

Signed-off-by: Ian Douglas Scott <idscott@system76.com>
This commit is contained in:
Ian Douglas Scott 2022-07-12 09:12:33 -07:00
parent 7cdc20cee6
commit 13b05c9ed1
4 changed files with 4 additions and 17 deletions
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2
src/connection.c
View file

@ -636,7 +636,7 @@ wl_closure_marshal(struct wl_object *sender, uint32_t opcode,
closure->args[i].n = object ? object->id : 0;
break;
case 'a':
if (!arg.nullable && args[i].a == NULL)
if (args[i].a == NULL)
goto err_null;
break;
case 'h':

3
src/scanner.c
View file

@ -411,11 +411,10 @@ static bool
is_nullable_type(struct arg *arg)
{
switch (arg->type) {
/* Strings, objects, and arrays are possibly nullable */
/* Strings and objects are possibly nullable */
case STRING:
case OBJECT:
case NEW_ID:
case ARRAY:
return true;
default:
return false;