Description
memoffset allows reading uninitialized memory
Details | |
---|---|
Status | unsound |
Package | memoffset |
Version | 0.5.6 |
URL | Gilnaa/memoffset#24 |
Date | 2023-06-21 |
memoffset allows attempt of reading data from address 0
with arbitrary type. This behavior is an undefined behavior because address 0
to std::mem::size_of<T>
may not have valid bit-pattern with T
. Old implementation dereferences uninitialized memory obtained from std::mem::align_of
. Older implementation prior to it allows using uninitialized data obtained from std::mem::uninitialized
with arbitrary type then compute offset by taking the address of field-projection. This may also result in an undefined behavior for "father" that includes (directly or transitively) type that does not allow to be uninitialized.
This flaw was corrected by using std::ptr::addr_of
in <Gilnaa/memoffset#50>.
See advisory page for additional details.
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