News for hackers. Stuff that matters.

A comment on System memory allocator free operation zeroes out deallocated blocks in iOS 16. Parent comment

Re:System memory allocator free operation zeroes out dealloc... by thewebcount on Thursday September 22, 2022 @07:54PM (#32946173)
Well the change is to zero out memory on deallocation. So on allocation it may or may not be zero depending on whether it was previously freed, right?
[ Parent | on HN ]
Re:System memory allocator free operation zeroes out dealloc... by Taniwha on Saturday September 24, 2022 @01:52AM (#32960023)
not necessarily, even if was freed there might be defragged free blocks that still contain heap metadata by the time it gets reallocated
[ Parent | on HN ]