Fix GH-14639: Member access within null pointer in ext/spl/spl_observer.c #14849
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…erver.c `spl_object_storage_attach_handle` creates an entry already, but only fills it in at the end with `spl_object_storage_create_element` which allocates memory. In this case the allocation fails and we're left with a NULL slot. Doing the allocation first isn't an option because we want to check whether the slot is occupied before allocating memory. The simplest solution is to set the entry to NULL and check for a NULL pointer upon destruction.
Girgias
approved these changes
Jul 6, 2024
Yeah we seem to hit them a lot lately. And they're a pain to debug (like that Curl one) |
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spl_object_storage_attach_handlecreates an entry already, but only fills it in at the end withspl_object_storage_create_elementwhich allocates memory. In this case the allocation fails and we're left with a NULL slot. Doing the allocation first isn't an option because we want to check whether the slot is occupied before allocating memory. The simplest solution is to set the entry to NULL and check for a NULL pointer upon destruction.