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app: fix #15288 crash when loading malformed xcf

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ZDI-CAN-28376 vulnerability

Add extra tests to not crash on a NULL g_class.
This commit is contained in:
Jacob Boerema 2025-11-13 18:26:51 -05:00
parent 6687f38908
commit 5cc55d078b
1 changed files with 4 additions and 1 deletions
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5
app/core/gimpitemlist.c
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@ -345,7 +345,10 @@ gimp_item_list_named_new (GimpImage *image,
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
for (iter = items; iter; iter = iter->next)
g_return_val_if_fail (g_type_is_a (G_OBJECT_TYPE (iter->data), item_type), NULL);
{
g_return_val_if_fail (iter->data && ((GTypeInstance*) (iter->data))->g_class, NULL);
g_return_val_if_fail (g_type_is_a (G_OBJECT_TYPE (iter->data), item_type), NULL);
}
if (! items)
{