On Wed, Oct 3, 2012 at 7:43 AM, Ard Biesheuvel <ard.biesheu...@gmail.com> wrote: > This patch adds support for the PROT_FINAL flag to > the mmap() and mprotect() syscalls. > > The PROT_FINAL flag indicates that the requested set > of protection bits should be final, i.e., it shall > not be allowed for a subsequent mprotect call to > set protection bits that were not set already. > > This is mainly intended for the dynamic linker, > which sets up the address space on behalf of > dynamic binaries. By using this flag, it can > prevent exploited code from remapping read-only > executable code or data sections read-write. > > Signed-off-by: Ard Biesheuvel <ard.biesheu...@gmail.com>
Reviewed-by: Kees Cook <keesc...@chromium.org> If it wasn't clear before, I like this idea. :) -Kees -- Kees Cook Chrome OS Security -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
