On 7/30/23 03:29, Boqun Feng wrote: > Currently the rust allocator simply passes the size of the type Layout > to krealloc(), and in theory the alignment requirement from the type > Layout may be larger than the guarantee provided by SLAB, which means > the allocated object is mis-aligned. > > Fix this by adjusting the allocation size to the nearest power of two, > which SLAB always guarantees a size-aligned allocation. And because Rust > guarantees that the original size must be a multiple of alignment and > the alignment must be a power of two, then the alignment requirement is > satisfied. > > Suggested-by: Vlastimil Babka <vbabka@xxxxxxx> > Co-developed-by: Andreas Hindborg (Samsung) <nmi@xxxxxxxxxxxx> > Signed-off-by: Andreas Hindborg (Samsung) <nmi@xxxxxxxxxxxx> > Signed-off-by: Boqun Feng <boqun.feng@xxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx # v6.1+ Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
