Fix crashes when entity declaration is removed while still having entity references #14089
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…ity references libxml doesn't do reference counting inside its node types. It's possible to remove an entity declaration out of the document, but then entity references will keep pointing to that stale declaration. This will cause crashes. One idea would be to check when a declaration is removed, to trigger a hook that updates all references. However this means we have to keep track of all references somehow, which would be a high-overhead solution. The solution in this patch makes sure that the fields are always updated before they are read.
devnexen
reviewed
Apr 30, 2024
devnexen
reviewed
Apr 30, 2024
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libxml doesn't do reference counting inside its node types. It's possible to remove an entity declaration out of the document, but then entity references will keep pointing to that stale declaration. This will cause crashes.
One idea would be to check when a declaration is removed, to trigger a hook that updates all references. However this means we have to keep track of all references somehow, which would be a high-overhead solution. The solution in this patch makes sure that the fields are always updated before they are read.