linux_dsm_epyc7002/arch/sh/kernel
Linus Torvalds 050e9baa9d Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
The changes to automatically test for working stack protector compiler
support in the Kconfig files removed the special STACKPROTECTOR_AUTO
option that picked the strongest stack protector that the compiler
supported.

That was all a nice cleanup - it makes no sense to have the AUTO case
now that the Kconfig phase can just determine the compiler support
directly.

HOWEVER.

It also meant that doing "make oldconfig" would now _disable_ the strong
stackprotector if you had AUTO enabled, because in a legacy config file,
the sane stack protector configuration would look like

  CONFIG_HAVE_CC_STACKPROTECTOR=y
  # CONFIG_CC_STACKPROTECTOR_NONE is not set
  # CONFIG_CC_STACKPROTECTOR_REGULAR is not set
  # CONFIG_CC_STACKPROTECTOR_STRONG is not set
  CONFIG_CC_STACKPROTECTOR_AUTO=y

and when you ran this through "make oldconfig" with the Kbuild changes,
it would ask you about the regular CONFIG_CC_STACKPROTECTOR (that had
been renamed from CONFIG_CC_STACKPROTECTOR_REGULAR to just
CONFIG_CC_STACKPROTECTOR), but it would think that the STRONG version
used to be disabled (because it was really enabled by AUTO), and would
disable it in the new config, resulting in:

  CONFIG_HAVE_CC_STACKPROTECTOR=y
  CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
  CONFIG_CC_STACKPROTECTOR=y
  # CONFIG_CC_STACKPROTECTOR_STRONG is not set
  CONFIG_CC_HAS_SANE_STACKPROTECTOR=y

That's dangerously subtle - people could suddenly find themselves with
the weaker stack protector setup without even realizing.

The solution here is to just rename not just the old RECULAR stack
protector option, but also the strong one.  This does that by just
removing the CC_ prefix entirely for the user choices, because it really
is not about the compiler support (the compiler support now instead
automatially impacts _visibility_ of the options to users).

This results in "make oldconfig" actually asking the user for their
choice, so that we don't have any silent subtle security model changes.
The end result would generally look like this:

  CONFIG_HAVE_CC_STACKPROTECTOR=y
  CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
  CONFIG_STACKPROTECTOR=y
  CONFIG_STACKPROTECTOR_STRONG=y
  CONFIG_CC_HAS_SANE_STACKPROTECTOR=y

where the "CC_" versions really are about internal compiler
infrastructure, not the user selections.

Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-14 12:21:18 +09:00
..
cpu sh: fix build failure for J2 cpu with SMP disabled 2018-05-05 16:51:40 -04:00
vsyscall License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
.gitignore
asm-offsets.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crash_dump.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugtraps.S sh: kgdb: Rework breakpoint handling on top of notifier chain. 2009-12-22 12:44:14 +09:00
disassemble.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
dma-nommu.c PCI: remove PCI_DMA_BUS_IS_PHYS 2018-05-07 07:15:41 +02:00
dumpstack.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
dwarf.c kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2017-11-15 18:21:04 -08:00
entry-common.S sh: fix debug trap failure to process signals before return to user 2018-04-12 19:47:52 -04:00
ftrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
head_32.S sh: fix build regression with CONFIG_OF && !CONFIG_OF_FLATTREE 2016-07-31 03:33:32 +00:00
head_64.S mm, arch: remove empty_bad_page* 2017-11-15 18:21:03 -08:00
hw_breakpoint.c signal/sh: Use force_sig_fault in hw_breakpoint_handler 2018-04-19 16:41:27 -05:00
idle.c sched/idle, SH: Remove redundant cpuidle_idle_call() 2014-02-11 09:58:26 +01:00
io_trapped.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
io.c sh: support for platforms without PIO. 2010-06-02 16:31:42 +09:00
iomap.c sh: machvec IO death. 2010-11-01 09:49:04 -04:00
ioport.c sections: fix section conflicts in arch/sh 2012-10-06 03:04:40 +09:00
irq_32.c Fix IRQ flag handling naming 2010-10-07 14:08:55 +01:00
irq_64.c sh64: update for IRQ flag handling naming changes. 2010-10-27 15:34:51 +09:00
irq.c softirq/sh: Use nmi_count() on /proc/interrupts print out 2018-05-14 11:25:27 +02:00
kdebugfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kgdb.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
kprobes.c sh: migrate exception table users off module.h and onto extable.h 2017-01-24 12:41:47 -05:00
machine_kexec.c memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users 2011-12-08 10:22:08 -08:00
machvec.c sh: Kill off machvec IRQ hinting. 2012-05-21 17:54:01 +09:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
nmi_debug.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
perf_callchain.c perf core: Pass max stack as a perf_callchain_entry context 2016-05-16 23:11:50 -03:00
perf_event.c sh/perf: Convert the hotplug notifiers to state machine callbacks 2016-07-14 09:34:39 +02:00
process_32.c Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables 2018-06-14 12:21:18 +09:00
process_64.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
process.c Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables 2018-06-14 12:21:18 +09:00
ptrace_32.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
ptrace_64.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
ptrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
reboot.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
relocate_kernel.S
return_address.c sh: handle early calls to return_address() when using dwarf unwinder. 2010-05-25 16:16:40 +09:00
setup.c sh: switch to NO_BOOTMEM 2018-05-11 13:35:46 -04:00
sh_bios.c early_printk: consolidate random copies of identical code 2013-04-29 18:28:13 -07:00
sh_ksyms_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sh_ksyms_64.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
signal_32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
signal_64.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
smp.c sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
stacktrace.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
swsusp.c
sys_sh32.c mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64() 2018-04-02 20:16:10 +02:00
sys_sh.c mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() 2018-04-02 20:16:11 +02:00
syscalls_32.S sh: system call wire up 2016-08-05 03:29:44 +00:00
syscalls_64.S sh: system call wire up 2016-08-05 03:29:44 +00:00
time.c These changes improve device tree support (including builtin DTB), add 2016-08-06 09:00:05 -04:00
topology.c sh: fix function signature of cpu_coregroup_mask to match pointer type 2016-03-30 00:47:49 +00:00
traps_32.c signal/sh: Stop gcc warning about an impossible case in do_divide_error 2018-05-29 09:59:21 -05:00
traps_64.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
traps.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwinder.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
vmlinux.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00