Fix GH-20404: crash when modifying weak references during destruction#22390
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khaledalam wants to merge 1 commit into
Open
Fix GH-20404: crash when modifying weak references during destruction#22390khaledalam wants to merge 1 commit into
khaledalam wants to merge 1 commit into
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Fixes GH-20404.
zend_weakrefs_notify()cleared weak references by iterating EG(weakrefs) in place. Clearing an entry can run a user destructor that reentrantly registers (grows/reallocates the HT mid-iteration → UAF) or unregisters pending entries.Reworked to pop one entry at a time, never holding a cursor across user code. Handles both the new-registration crash and the existing nested-WeakMap unregistration path.