On Sat, Feb 4, 2017 at 6:13 AM, Kees Cook <[email protected]> wrote: > On Thu, Feb 2, 2017 at 9:11 PM, Bhupesh Sharma <[email protected]> wrote: >> powerpc: arch_mmap_rnd() uses hard-coded values, (23-PAGE_SHIFT) for >> 32-bit and (30-PAGE_SHIFT) for 64-bit, to generate the random offset >> for the mmap base address. >> >> This value represents a compromise between increased >> ASLR effectiveness and avoiding address-space fragmentation. >> Replace it with a Kconfig option, which is sensibly bounded, so that >> platform developers may choose where to place this compromise. >> Keep default values as new minimums. >> >> This patch makes sure that now powerpc mmap arch_mmap_rnd() approach >> is similar to other ARCHs like x86, arm64 and arm. >> >> Cc: Alexander Graf <[email protected]> >> Cc: Benjamin Herrenschmidt <[email protected]> >> Cc: Paul Mackerras <[email protected]> >> Cc: Michael Ellerman <[email protected]> >> Cc: Anatolij Gustschin <[email protected]> >> Cc: Alistair Popple <[email protected]> >> Cc: Matt Porter <[email protected]> >> Cc: Vitaly Bordug <[email protected]> >> Cc: Scott Wood <[email protected]> >> Cc: Kumar Gala <[email protected]> >> Cc: Daniel Cashman <[email protected]> >> Signed-off-by: Bhupesh Sharma <[email protected]> >> Reviewed-by: Kees Cook <keescook at chromium.org> > > This " at " should be "@", but otherwise, yay v2! :) >
Noted. Sorry for the typo :( Regards, Bhupesh
