| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 5 Oct 2017 09:49:06 +0200 From: Christophe LEROY <christophe.leroy@....fr> To: Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org Cc: Paul Mackerras <paulus@...ba.org>, linuxppc-dev@...ts.ozlabs.org Subject: Re: [PATCH] powerpc: Default to enabling STRICT_KERNEL_RWX Le 05/10/2017 à 05:45, Kees Cook a écrit : > When available, CONFIG_KERNEL_RWX should be default-enabled. On PPC32, this option implies deactivating BATs and/or LTLB mapping of the linear kernel address space, hence a significant performance degradation. So at least on PPC32, it should remain unselected by default. Christophe > > Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org> > Cc: Paul Mackerras <paulus@...ba.org> > Cc: Michael Ellerman <mpe@...erman.id.au> > Cc: linuxppc-dev@...ts.ozlabs.org > Signed-off-by: Kees Cook <keescook@...omium.org> > --- > arch/powerpc/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 809c468edab1..9a549bbfc278 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -178,6 +178,7 @@ config PPC > select HAVE_ARCH_TRACEHOOK > select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) > select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX > + select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT > select HAVE_CBPF_JIT if !PPC64 > select HAVE_CONTEXT_TRACKING if PPC64 > select HAVE_DEBUG_KMEMLEAK >
Powered by blists - more mailing lists