* Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin [not found] ` <851a0c99-db08-c3a8-f5c6-2e567971e2eb@au1.ibm.com> @ 2017-03-28 3:03 ` Andrew Donnellan 2017-03-28 19:00 ` Kees Cook 0 siblings, 1 reply; 2+ messages in thread From: Andrew Donnellan @ 2017-03-28 3:03 UTC (permalink / raw) To: Kees Cook, linux-kernel Cc: Emese Revfy, Arnd Bergmann, Josh Triplett, pageexec, yamada.masahiro, minipli, linux, catalin.marinas, linux, david.brown, benh, tglx, akpm, jlayton, sam, kernel-hardening, linuxppc-dev, Michael Ellerman On 27/03/17 18:38, Andrew Donnellan wrote: > On 01/02/17 07:24, Kees Cook wrote: >> From: Emese Revfy <re.emese@gmail.com> >> >> The kernel already has a mechanism to free up code and data memory that >> is only used during kernel or module initialization. This plugin will >> teach the compiler to find more such code and data that can be freed >> after initialization. > > Currently checking whether we can wire this up for powerpc without too > many problems... Added "select HAVE_GCC_PLUGIN_INITIFY_INIT_EXIT if GCC_PLUGINS" to arch/powerpc/Kconfig and have successfully compiled and booted a modular and non-modular powernv_defconfig, it looks like we handle the .exit sections correctly. Could this be folded in for further testing when you get around to v6, Kees? -- Andrew Donnellan OzLabs, ADL Canberra andrew.donnellan@au1.ibm.com IBM Australia Limited ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin 2017-03-28 3:03 ` [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin Andrew Donnellan @ 2017-03-28 19:00 ` Kees Cook 0 siblings, 0 replies; 2+ messages in thread From: Kees Cook @ 2017-03-28 19:00 UTC (permalink / raw) To: Andrew Donnellan Cc: LKML, Emese Revfy, Arnd Bergmann, Josh Triplett, PaX Team, Masahiro Yamada, minipli, Russell King, Catalin Marinas, Rasmus Villemoes, David Brown, benh@kernel.crashing.org, Thomas Gleixner, Andrew Morton, Jeff Layton, Sam Ravnborg, kernel-hardening@lists.openwall.com, linuxppc-dev, Michael Ellerman On Mon, Mar 27, 2017 at 8:03 PM, Andrew Donnellan <andrew.donnellan@au1.ibm.com> wrote: > On 27/03/17 18:38, Andrew Donnellan wrote: >> >> On 01/02/17 07:24, Kees Cook wrote: >>> >>> From: Emese Revfy <re.emese@gmail.com> >>> >>> The kernel already has a mechanism to free up code and data memory that >>> is only used during kernel or module initialization. This plugin will >>> teach the compiler to find more such code and data that can be freed >>> after initialization. >> >> >> Currently checking whether we can wire this up for powerpc without too >> many problems... > > > Added "select HAVE_GCC_PLUGIN_INITIFY_INIT_EXIT if GCC_PLUGINS" to > arch/powerpc/Kconfig and have successfully compiled and booted a modular and > non-modular powernv_defconfig, it looks like we handle the .exit sections > correctly. > > Could this be folded in for further testing when you get around to v6, Kees? Awesome, thanks for testing! I'll get it queued for a v6... -Kees -- Kees Cook Pixel Security ^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-03-28 3:03 ` [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin Andrew Donnellan
2017-03-28 19:00 ` Kees Cook
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