slab: add __alloc_size attributes for better bounds checking

slab: add __alloc_size attributes for better bounds checking

As already done in GrapheneOS, add the __alloc_size attribute for
regular kmalloc interfaces, to provide additional hinting for better
bounds checking, assisting CONFIG_FORTIFY_SOURCE and other compiler
optimizations.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kees Cook <[email protected]>
Co-developed-by: Daniel Micay <[email protected]>
Signed-off-by: Daniel Micay <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Andy Whitcroft <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Dwaipayan Ray <[email protected]>
Cc: Joe Perches <[email protected]>
Cc: Lukas Bulwahn <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Alexandre Bounine <[email protected]>
Cc: Gustavo A. R. Silva <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: Jing Xiangfeng <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: kernel test robot <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Souptick Joarder <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>